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Cheap flights from San Francisco to London from £301

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
15 Apr — 22 Apr1
1 adult

Cheapflights Tip: The best prices from San Francisco to London are usually found in October or September, booked 38 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 April 2025.

Round-trip from

£480

One-way from

£301

Popular in

June

Cheapest in

October

Average price

£527

Good round-trip deal

£518 or less

Good one-way deal

£338 or less
British Airways
  • British Airways
  • 30/4-15/5
  • 2 total stops
  • 33h 50m total
  • San Francisco to London
25/5
  • 25/5
  • 3 total stops
  • 38h 35m total
  • San Francisco to London
Highest demand for flights based on searches. 19% potential increase in price (£109 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from San Francisco to London (LON).
Price to beat on a one-way flight from San Francisco to London (LON).

Find flight deals from San Francisco to London

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 April 2025.

Sun 27/419:30SFO - LGW
1 stop14h 20mSWISS
Tue 6/518:35LGW - SFO
1 stop29h 35mSWISS
Deal found 10/4£480
Sat 2/808:00SFO - LHR
1 stop14h 25mIberia
Sat 6/914:25LHR - SFO
1 stop15h 04mIberia
Deal found 8/4£480
Tue 2/906:20SFO - LGW
1 stop17h 50mMultiple Airlines
Wed 17/915:05LGW - SFO
1 stop16h 52mMultiple Airlines
Deal found 9/4£481
Tue 15/419:40SFO - LHR
2 stops17h 55mScandinavian Airlines
Thu 24/406:40LHR - SFO
1 stop17h 50mScandinavian Airlines
Deal found 9/4£481
Sun 27/416:05SFO - LHR
Nonstop10h 20mDelta
Fri 16/516:25LHR - SFO
Nonstop11h 05mDelta
Deal found 9/4£482
Tue 29/419:30SFO - LCY
1 stop14h 00mSWISS
Tue 13/519:20LCY - SFO
1 stop28h 50mSWISS
Deal found 9/4£482
Wed 3/1216:35SFO - LGW
1 stop15h 10mTAP AIR PORTUGAL
Wed 10/1209:35LGW - SFO
2 stops61h 10mTAP AIR PORTUGAL
Deal found 9/4£485
Sat 10/522:20SFO - LHR
1 stop13h 25mAmerican Airlines
Thu 22/507:40LHR - SFO
1 stop16h 15mAmerican Airlines
Deal found 9/4£485
Wed 7/508:29SFO - LHR
1 stop19h 21mAir Canada
Thu 22/508:40LHR - SFO
2 stops19h 30mAir Canada
Deal found 9/4£487
Thu 1/511:25SFO - LHR
1 stop35h 05mMultiple Airlines
Tue 13/520:05LHR - SFO
1 stop28h 05mMultiple Airlines
Deal found 9/4£488
Wed 20/811:30SFO - LGW
1 stop14h 30mDelta
Fri 29/812:00LGW - SFO
1 stop17h 08mDelta
Deal found 9/4£489
Wed 30/413:30SFO - LHR
1 stop13h 40mUnited Airlines
Wed 7/508:40LHR - SFO
1 stop15h 30mUnited Airlines
Deal found 9/4£491

Cheapflights Fare Finder

Customise your flight search to find flights from San Francisco to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 April 2025.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Sun 27/4

19:30-17:50

1 stop14h 20m

London Gatwick

Tue 6/5

18:35-16:10

1 stop29h 35m

£480

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 2/8

08:00-06:25

1 stop14h 25m

London Heathrow

Sat 6/9

14:25-21:29

1 stop15h 04m

£480

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Tue 2/9

06:20-08:10

1 stop17h 50m

London Gatwick

Wed 17/9

15:05-23:57

1 stop16h 52m

£481

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 28/4

21:20-15:40

Nonstop10h 20m

London Heathrow

Tue 6/5

16:25-19:30

Nonstop11h 05m

£481

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 22/4

16:05-10:25

Nonstop10h 20m

London Heathrow

Wed 30/4

16:25-19:30

Nonstop11h 05m

£482

San FranciscoLondon

SFO - LCY

SFOLCY

San Francisco

Tue 29/4

19:30-17:30

1 stop14h 00m

London City

Tue 13/5

19:20-16:10

1 stop28h 50m

£482

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 21/9

19:40-17:40

1 stop14h 00m

London Heathrow

Sun 28/9

21:05-16:30

2 stops27h 25m

£484

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 10/5

22:20-19:45

1 stop13h 25m

London Heathrow

Thu 22/5

07:40-15:55

1 stop16h 15m

£485

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Tue 9/9

18:45-09:45

2 stops31h 00m

London Gatwick

Tue 16/9

16:25-14:35

1 stop30h 10m

£486

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 28/4

10:56-17:50

2 stops22h 54m

London Heathrow

Thu 15/5

08:40-16:10

1 stop15h 30m

£486

Flights are sorted by cheapest return flights first.

Deals found on 10/4

Showing 1-10 of 60 results
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Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 4 April 2025.

The price you pay for your flight from San Francisco to London may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London 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 LON?

Find hourly flight availability from San Francisco to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 April 2025.

When flying from San Francisco to London, 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?

Use this chart to determine the cheapest time to fly return from San Francisco to London. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their San Francisco to London 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

Explore weekly flight availability from San Francisco to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 10 April 2025.

The most flights from SFO to LON are scheduled on a Monday (37 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (37 on average).

Rainfall in London by month

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

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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 London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 10 April 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from San Francisco to London. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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.
8.0
Very Good

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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.

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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.

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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.

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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.

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

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

Find useful and relevant information for your journey from San Francisco to London. 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?

    Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 37 daily outbound flights to London from 10 different airlines.

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

    Our cheapest airline available from San Francisco to London is British Airways. Our recent data shows that you can find tickets from as low as £480 on this airline. Additional options worth looking into are Iberia and Delta, starting at £480 and £481 round-trip. British Airways is currently priced 20% below the average price you’ll pay for this route.

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

    For one-way options, check prices for Virgin Atlantic. According to our data, you can fly for as low as £301. Users have also found prices from £304 and £308 on Scandinavian Airlines and JetBlue, respectively.

  • What are the most popular routes from San Francisco to London?

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

    Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Air Canada (85%), Austrian Airlines (85%), SWISS( 85%).

  • What are the cheapest flights from San Francisco to London?

    Looking at all options, your cheapest flight can be booked for £297. While the most popular route (San Francisco - London Heathrow) can be booked for £417 on average our data indicates £2,337 when flying from San Francisco to London.

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

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

  • How can I find direct flights from San Francisco to London?

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

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

    Yes. Cheapflights offers flight deals from San Francisco to London 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?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to London (average of £112). Flying from San Francisco to London 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Luton
Gatwick
Croydon
Slough
Eastbourne
Wembley
Crawley
Hayes
Southend-on-Sea
Maidstone
Ilford
Winchester
Ipswich
Southall
Folkestone
Dartford
Watford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from San Francisco to London

Discover the top 10 airlines that operate flights from San Francisco to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 April 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£382Average£673FlexibilityNo cancel feeOn-time76%
Search Finnair flights
TAP AIR PORTUGALCheapest£410Average£426FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£442Average£632FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IberiaCheapest£448Average£562FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£451Average£570FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£455Average£700FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£464Average£531FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£477Average£707FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£505Average£725FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
DeltaCheapest£535Average£727FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Fly with Cheapflights

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

When you search for this flight from San Francisco to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from San Francisco.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to London flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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