What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?

Currently priced at £466, Iberia will fly you from San Francisco to London Heathrow Airport and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Air Canada - these airlines can fly you to your destination from £473 and £475, respectively. Users have found that Iberia is 23% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?

To fly one-way, consider booking your trip with Scandinavian Airlines, which is currently one of the cheapest options available, starting at £302. Virgin Atlantic flights start at £303 while deals on JetBlue start at £305 one-way.

What are the cheapest flights from San Francisco to London Heathrow Airport?

On average you can expect to pay £2,037 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £290 while the most popular route, (San Francisco - London Heathrow) is currently priced at £428.

What are the most reliable airlines from San Francisco to London Heathrow Airport?

Consider United Airlines (86%), Iberia (86%) or American Airlines (84%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.

What are the most popular airlines that fly from San Francisco to London Heathrow Airport?

The most popular airlines flying from San Francisco to London Heathrow Airport are Air Canada, Finnair and British Airways. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from San Francisco to London Heathrow Airport?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 34% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from San Francisco to London Heathrow Airport?

Our data shows that October tends to be the cheapest month to fly to London Heathrow Airport from San Francisco. Users have commonly found prices around £599 for the month, but tickets can be as low as £402. Due to multiple factors, prepare for potentially higher prices in June.

What airport do you fly from for flights from San Francisco to London Heathrow?

For a flight from San Francisco to London Heathrow, you will be flying from San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 32 outbound flights to London Heathrow per day. 10 airlines have flights to London Heathrow from San Francisco on a regular basis.

Can I find deals for flights from San Francisco to Heathrow that include hotel bookings?

Yes. In addition to deals on San Francisco to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from San Francisco to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Heathrow.

Can I find deals for business class flights from San Francisco to Heathrow?

Yes. Cheapflights offers flight deals from San Francisco to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£297+ Flights from San Francisco to London Heathrow Airport

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to Heathrow

Round-trip from	£466
One-way from	£297
Popular in	June
Cheapest in	October
Average price	£533
Good round-trip deal	£513 or less
Good one-way deal	£308 or less

Iberia
6/4-22/4
Nonstop
21h 25m total
San Francisco to London

Search Deals

4/4
2 total stops
56h 20m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£119 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from San Francisco to London Heathrow.

Search Deals

Price to beat on a one-way flight from San Francisco to London Heathrow.

Search Deals

Find flight deals from San Francisco to Heathrow

Cheapest flights from San Francisco to Heathrow
Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2025.

Mon 7/408:05SFO - LHR

1 stop14h 20mIberia

Tue 15/410:45LHR - SFO

Nonstop11h 05mIberia

Deal found 19/3£463

Sun 19/1019:40SFO - LHR

1 stop14h 00mScandinavian Airlines

Sun 26/1019:30LHR - SFO

1 stop30h 25mScandinavian Airlines

Deal found 20/3£465

Sun 6/416:40SFO - LHR

1 stop13h 35mVirgin Atlantic

Tue 22/406:15LHR - SFO

1 stop14h 35mVirgin Atlantic

Deal found 21/3£468

Sun 6/407:00SFO - LHR

1 stop22h 20mMultiple Airlines

Tue 22/408:45LHR - SFO

1 stop15h 25mMultiple Airlines

Deal found 21/3£471

Sun 6/407:00SFO - LHR

1 stop22h 20mAir Canada

Tue 22/414:05LHR - SFO

1 stop15h 40mAir Canada

Deal found 21/3£474

Wed 19/1117:30SFO - LHR

Nonstop10h 30mBritish Airways

Fri 28/1111:45LHR - SFO

Nonstop11h 15mBritish Airways

Deal found 21/3£484

Sun 6/419:30SFO - LHR

Nonstop10h 25mFinnair

Tue 22/410:45LHR - SFO

Nonstop11h 05mFinnair

Deal found 21/3£485

Mon 24/318:20SFO - LHR

1 stop15h 30mAer Lingus

Wed 2/408:50LHR - SFO

1 stop14h 55mAer Lingus

Deal found 21/3£489

Wed 23/419:40SFO - LHR

Nonstop10h 30mUnited Airlines

Mon 28/412:10LHR - SFO

1 stop36h 00mUnited Airlines

Deal found 20/3£492

Tue 30/912:30SFO - LHR

1 stop14h 50mDelta

Tue 14/1016:25LHR - SFO

Nonstop11h 05mDelta

Deal found 19/3£498

Thu 11/1219:25SFO - LHR

1 stop33h 35mSWISS

Tue 16/1206:00LHR - SFO

1 stop18h 25mSWISS

Deal found 21/3£529

Tue 13/513:45SFO - LHR

1 stop12h 05mKLM

Wed 28/506:30LHR - SFO

1 stop13h 15mKLM

Deal found 20/3£531

Best flights from San Francisco to Heathrow
Discover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 March 2025.

Sun 6/419:30SFO - LHR

Nonstop10h 25mIberia

Tue 22/414:15LHR - SFO

Nonstop11h 00mIberia

Deal found 21/3£466

Mon 14/411:40SFO - LHR

1 stop34h 55mMultiple Airlines

Thu 24/408:40LHR - SFO

1 stop15h 30mMultiple Airlines

Deal found 20/3£467

Sun 6/406:10SFO - LHR

1 stop19h 50mVirgin Atlantic

Tue 22/406:15LHR - SFO

1 stop14h 35mVirgin Atlantic

Deal found 22/3£473

Sun 6/407:00SFO - LHR

1 stop22h 20mAir Canada

Tue 22/409:30LHR - SFO

1 stop20h 15mAir Canada

Deal found 21/3£475

Tue 1/419:40SFO - LHR

1 stop14h 00mScandinavian Airlines

Tue 15/406:40LHR - SFO

1 stop17h 50mScandinavian Airlines

Deal found 22/3£475

Wed 16/412:55SFO - LHR

Nonstop10h 30mUnited Airlines

Wed 7/510:50LHR - SFO

1 stop16h 10mUnited Airlines

Deal found 21/3£482

Sun 6/419:30SFO - LHR

1 stop14h 20mSWISS

Tue 22/420:05LHR - SFO

1 stop28h 05mSWISS

Deal found 21/3£484

Sun 6/419:30SFO - LHR

Nonstop10h 25mFinnair

Tue 22/414:15LHR - SFO

Nonstop11h 00mFinnair

Deal found 22/3£485

Wed 16/419:40SFO - LHR

Nonstop10h 30mLufthansa

Wed 30/412:20LHR - SFO

Nonstop11h 05mLufthansa

Deal found 21/3£489

Wed 23/406:10SFO - LHR

1 stop19h 50mDelta

Wed 7/506:15LHR - SFO

1 stop20h 00mDelta

Deal found 21/3£492

Sun 6/416:20SFO - LHR

Nonstop10h 35mBritish Airways

Thu 24/410:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 21/3£516

Wed 9/417:45SFO - LHR

1 stop13h 10mAer Lingus

Thu 24/409:50LHR - SFO

1 stop13h 55mAer Lingus

Deal found 21/3£518

Direct flights from San Francisco to Heathrow
Explore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 22 March 2025.

Sun 6/419:30SFO - LHR

Nonstop10h 25mIberia

Tue 22/414:15LHR - SFO

Nonstop11h 00mIberia

Deal found 21/3£466

Sun 6/416:05SFO - LHR

Nonstop10h 20mVirgin Atlantic

Tue 22/411:15LHR - SFO

Nonstop11h 05mVirgin Atlantic

Deal found 21/3£479

Sun 6/419:30SFO - LHR

Nonstop10h 25mFinnair

Tue 22/414:15LHR - SFO

Nonstop11h 00mFinnair

Deal found 22/3£485

Wed 16/419:40SFO - LHR

Nonstop10h 30mLufthansa

Wed 30/412:20LHR - SFO

Nonstop11h 05mLufthansa

Deal found 21/3£489

Tue 15/416:05SFO - LHR

Nonstop10h 20mDelta

Tue 29/411:15LHR - SFO

Nonstop11h 05mDelta

Deal found 21/3£492

Sun 6/415:55SFO - LHR

Nonstop10h 30mUnited Airlines

Fri 18/412:20LHR - SFO

Nonstop11h 05mUnited Airlines

Deal found 22/3£494

Sun 27/419:30SFO - LHR

Nonstop10h 25mBritish Airways

Sun 25/510:45LHR - SFO

Nonstop11h 05mBritish Airways

Deal found 21/3£508

Sun 6/419:30SFO - LHR

Nonstop10h 25mAer Lingus

Tue 22/414:15LHR - SFO

Nonstop11h 00mAer Lingus

Deal found 21/3£651

Fri 18/412:55SFO - LHR

Nonstop10h 30mBrussels Airlines

Fri 25/416:15LHR - SFO

Nonstop11h 05mBrussels Airlines

Deal found 21/3£693

Last-minute flights from San Francisco to Heathrow
Discover last-minute flight deals from San Francisco to Heathrow. Data last updated 22 March 2025 and is based on user searches.

Mon 24/318:20SFO - LHR

1 stop15h 30mAer Lingus

Wed 2/408:50LHR - SFO

1 stop14h 55mAer Lingus

Deal found 21/3£489

Mon 24/321:35SFO - LHR

1 stop14h 00mLufthansa

Mon 31/318:30LHR - SFO

1 stop26h 10mLufthansa

Deal found 21/3£536

Thu 27/321:35SFO - LHR

1 stop14h 00mLufthansa

Thu 10/410:50LHR - SFO

1 stop16h 10mLufthansa

Deal found 21/3£546

Thu 27/313:20SFO - LHR

1 stop15h 20mBritish Airways

Sun 13/415:10LHR - SFO

1 stop16h 31mBritish Airways

Deal found 22/3£574

Thu 27/309:15SFO - LHR

1 stop15h 40mAir France

Mon 31/319:45LHR - SFO

2 stops31h 18mAir France

Deal found 21/3£584

Thu 27/317:40SFO - LHR

Nonstop10h 15mVirgin Atlantic

Tue 1/411:15LHR - SFO

Nonstop11h 05mVirgin Atlantic

Deal found 21/3£618

Fri 28/310:37SFO - LHR

1 stop13h 13mIberia

Sat 3/510:45LHR - SFO

Nonstop11h 05mIberia

Deal found 21/3£567

Sat 29/316:04SFO - LHR

2 stops18h 26mScandinavian Airlines

Mon 31/321:05LHR - SFO

2 stops27h 25mScandinavian Airlines

Deal found 21/3£469

Sun 30/319:30SFO - LHR

1 stop14h 20mSWISS

Mon 7/420:05LHR - SFO

1 stop28h 05mSWISS

Deal found 21/3£499

Mon 31/315:55SFO - LHR

Nonstop10h 30mMultiple Airlines

Tue 13/508:45LHR - SFO

1 stop15h 25mMultiple Airlines

Deal found 21/3£501

Mon 31/316:05SFO - LHR

Nonstop10h 20mDelta

Wed 14/506:30LHR - SFO

1 stop13h 15mDelta

Deal found 21/3£504

Mon 31/311:55SFO - LHR

1 stop13h 40mAir Canada

Tue 13/510:15LHR - SFO

2 stops20h 56mAir Canada

Deal found 21/3£520

One-way flights from San Francisco to Heathrow
Search for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 22 March 2025.

Fri 4/421:55SFO - LHR

2 stops56h 20mMultiple Airlines

Deal found 21/3£297

Sun 18/519:40SFO - LHR

1 stop18h 00mScandinavian Airlines

Deal found 21/3£302

Sun 4/521:20SFO - LHR

Nonstop10h 20mVirgin Atlantic

Deal found 21/3£303

Thu 24/408:25SFO - LHR

1 stop14h 05mJetBlue

Deal found 22/3£305

Wed 30/419:30SFO - LHR

Nonstop10h 25mBritish Airways

Deal found 21/3£308

Tue 22/417:45SFO - LHR

1 stop18h 35mAer Lingus

Deal found 22/3£308

Wed 30/419:30SFO - LHR

Nonstop10h 25mIberia

Deal found 21/3£310

Tue 22/416:05SFO - LHR

Nonstop10h 20mDelta

Deal found 21/3£312

Mon 21/400:08SFO - LHR

1 stop22h 12mUnited Airlines

Deal found 22/3£316

Fri 20/614:45SFO - LHR

3 stops37h 20mWestJet

Deal found 21/3£322

Wed 9/716:20SFO - LHR

1 stop17h 25mTAP AIR PORTUGAL

Deal found 22/3£323

Fri 18/422:45SFO - LHR

2 stops27h 15mAir Canada

Deal found 21/3£325

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 6/4

19:30-13:55

Nonstop10h 25m

London Heathrow

Tue 22/4

14:15-17:15

Nonstop11h 00m

£466

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 14/4

11:40-06:35

1 stop34h 55m

London Heathrow

Thu 24/4

08:40-16:10

1 stop15h 30m

£467

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 6/4

06:10-10:00

1 stop19h 50m

London Heathrow

Tue 22/4

06:15-12:50

1 stop14h 35m

£473

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 6/4

07:00-13:20

1 stop22h 20m

London Heathrow

Tue 22/4

14:05-21:45

1 stop15h 40m

£474

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 1/4

19:40-17:40

1 stop14h 00m

London Heathrow

Tue 15/4

06:40-16:30

1 stop17h 50m

£475

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 16/4

19:40-14:10

Nonstop10h 30m

London Heathrow

Tue 6/5

07:25-19:00

1 stop19h 35m

£482

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 6/4

19:30-17:50

1 stop14h 20m

London Heathrow

Tue 22/4

20:05-16:10

1 stop28h 05m

£484

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 6/4

19:30-13:55

Nonstop10h 25m

London Heathrow

Tue 22/4

14:15-17:15

Nonstop11h 00m

£485

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 16/4

19:40-14:10

Nonstop10h 30m

London Heathrow

Wed 30/4

12:20-15:25

Nonstop11h 05m

£489

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 23/4

06:10-10:00

1 stop19h 50m

London Heathrow

Wed 7/5

06:15-18:15

1 stop20h 00m

£492

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 33 results

Best time to book a flight from San Francisco to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to London Heathrow Airport

How far ahead should I book a flight from San Francisco to London Heathrow Airport?

Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £112). Flying from San Francisco to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to LHR?

When flying from San Francisco to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 27% versus a flight at midday.

What is the cheapest day to fly from San Francisco to London Heathrow Airport?

Travellers seeking maximum savings on their San Francisco to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to London Heathrow Airport

The most flights from SFO to LHR are scheduled on a Monday (32 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

To help decide which airline to fly from San Francisco to London, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,892 reviews

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,319 reviews

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,266 reviews

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

768 reviews

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,567 reviews

Delta

8.0

Very Good

7,892 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from San Francisco to London Heathrow?
For a flight from San Francisco to London Heathrow, you will be flying from San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 32 outbound flights to London Heathrow per day. 10 airlines have flights to London Heathrow from San Francisco on a regular basis.
What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?
Currently priced at £466, Iberia will fly you from San Francisco to London Heathrow Airport and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Air Canada - these airlines can fly you to your destination from £473 and £475, respectively. Users have found that Iberia is 23% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?
To fly one-way, consider booking your trip with Scandinavian Airlines, which is currently one of the cheapest options available, starting at £302. Virgin Atlantic flights start at £303 while deals on JetBlue start at £305 one-way.
What are the most reliable airlines from San Francisco to London Heathrow Airport?
Consider United Airlines (86%), Iberia (86%) or American Airlines (84%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.
What are the cheapest flights from San Francisco to London Heathrow Airport?
On average you can expect to pay £2,037 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £290 while the most popular route, (San Francisco - London Heathrow) is currently priced at £428.
Can I find deals for flights from San Francisco to Heathrow that include hotel bookings?
Yes. In addition to deals on San Francisco to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Heathrow.
Can I find deals for business class flights from San Francisco to Heathrow?
Yes. Cheapflights offers flight deals from San Francisco to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £112). Flying from San Francisco to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Milton Keynes

Gatwick

Croydon

Slough

Luton

Eastbourne

Northampton

Ilford

Swindon

Hayes

Crawley

Southend-on-Sea

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Maidstone

Winchester

Ipswich

Watford

Southall

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from San Francisco to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£379	Average£666	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
TAP AIR PORTUGAL	Cheapest£406	Average£422	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£438	Average£610	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£444	Average£556	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£447	Average£555	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£451	Average£693	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
KLM	Cheapest£459	Average£526	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£472	Average£652	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£500	Average£735	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Delta	Cheapest£530	Average£720	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights

Fly with Cheapflights

How does Cheapflights help users find flights from San Francisco to Heathrow?

Cheapflights helps you search for flights from San Francisco to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from San Francisco to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from San Francisco to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from San Francisco to Heathrow become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Francisco today and book when prices fit your budget.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from San Francisco to London Heathrow Airport from £297

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or February, booked 64 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from San Francisco to Heathrow

Cheapest flights from San Francisco to HeathrowExplore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2025.

Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2025.

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Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.

Best time to book a flight from San Francisco to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to London Heathrow Airport

How far ahead should I book a flight from San Francisco to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from San Francisco to Heathrow. Price data was last updated on 14 March 2025.

What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?

What is the cheapest time of day to fly from SFO to LHR?

Find hourly flight availability from San Francisco to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 March 2025.

What is the cheapest day to fly from San Francisco to London Heathrow Airport?

Use this chart to determine the cheapest time to fly return from San Francisco to Heathrow. Price data was last updated on 16 March 2025.

Weekly flight availability from San Francisco to London Heathrow Airport

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

To help decide which airline to fly from San Francisco to London, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from San Francisco to London Heathrow?

What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?

What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?

What are the most reliable airlines from San Francisco to London Heathrow Airport?

What are the cheapest flights from San Francisco to London Heathrow Airport?

Can I find deals for flights from San Francisco to Heathrow that include hotel bookings?

How can I find direct flights from San Francisco to Heathrow?

Can I find deals for business class flights from San Francisco to Heathrow?

What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?

Travelling to a place near San Francisco?

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Alternative routes for San Francisco to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from San Francisco to Heathrow

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Cheapest flights from San Francisco to Heathrow
Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2025.