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Cheap flights from the United Kingdom to San Francisco from £239

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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
31 Mar — 7 Apr1
1 adult

Cheap flight deals from United Kingdom to San Francisco

Keep the following information in mind while searching for United Kingdom to San Francisco flight deals. Data was last updated 26 March 2025.

Round-trip from

£400

One-way from

£239

Popular in

July

Cheapest in

February

Average price

£477

Good round-trip deal

£459 or less

Good one-way deal

£488 or less
KLM
  • KLM
  • 28/4-20/5
  • Nonstop
  • 21h 25m total
  • United Kingdom to San Francisco
Search Deals
3/5
  • 3/5
  • 3 total stops
  • 43h 50m total
  • United Kingdom to San Francisco
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£92 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 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 United Kingdom to San Francisco.
Search Deals
Price to beat on a one-way flight from United Kingdom to San Francisco.
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Find flight deals from United Kingdom to San Francisco

Cheapest flights from United Kingdom to San Francisco
Explore the most affordable flight options available from United Kingdom to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2025.

Mon 28/416:25LHR - SFO
Nonstop11h 05mAir France
Tue 20/521:20SFO - LHR
Nonstop10h 20mAir France
Deal found 25/3£400
Fri 2/508:40LHR - SFO
1 stop15h 30mMultiple Airlines
Fri 9/508:15SFO - LHR
1 stop14h 15mMultiple Airlines
Deal found 26/3£400
Fri 9/518:40LHR - SFO
1 stop29h 50mScandinavian Airlines
Sun 18/519:40SFO - LHR
1 stop14h 00mScandinavian Airlines
Deal found 26/3£401
Tue 22/414:10LHR - SFO
1 stop14h 41mAir Canada
Tue 29/408:30SFO - LHR
1 stop14h 05mAir Canada
Deal found 25/3£403
Sat 18/1011:25LHR - SFO
2 stops20h 46mUnited Airlines
Sat 22/1112:50SFO - LHR
Nonstop10h 35mUnited Airlines
Deal found 26/3£404
Mon 21/406:30LHR - SFO
1 stop17h 35mLufthansa
Sat 10/515:55SFO - LHR
Nonstop10h 30mLufthansa
Deal found 26/3£405
Thu 11/911:15LHR - SFO
Nonstop11h 00mKLM
Sat 20/921:20SFO - LHR
Nonstop10h 20mKLM
Deal found 25/3£407
Mon 21/408:55EDI - SFO
1 stop16h 20mBritish Airways
Mon 28/419:30SFO - EDI
1 stop13h 10mBritish Airways
Deal found 25/3£410
Wed 14/518:35LGW - SFO
1 stop29h 35mSWISS
Tue 20/514:00SFO - LGW
1 stop19h 50mSWISS
Deal found 26/3£410
Mon 28/415:05LGW - SFO
1 stop17h 05mBritish Airways
Sun 11/507:21SFO - LGW
1 stop16h 29mBritish Airways
Deal found 26/3£412
Thu 8/506:00LHR - SFO
1 stop18h 10mSWISS
Mon 12/519:30SFO - LHR
1 stop14h 20mSWISS
Deal found 25/3£413
Sun 14/909:50LHR - SFO
1 stop13h 55mBritish Airways
Wed 24/916:35SFO - LHR
Nonstop10h 25mBritish Airways
Deal found 25/3£414

Cheapflights Fare Finder

Customise your flight search to find flights from United Kingdom to San Francisco 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 26 March 2025.
Use the filters below to find and compare flights from the United Kingdom to San Francisco that are best for you.

Fly from

United Kingdom

Fly to

San Francisco

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 28/4

16:25-19:30

Nonstop11h 05m

San Francisco

Tue 20/5

21:20-15:40

Nonstop10h 20m

£400

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 2/5

08:40-16:10

1 stop15h 30m

San Francisco

Fri 9/5

08:15-06:30

1 stop14h 15m

£400

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 9/5

18:40-16:30

1 stop29h 50m

San Francisco

Sun 18/5

19:40-17:40

1 stop14h 00m

£401

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 1/5

16:15-19:20

Nonstop11h 05m

San Francisco

Thu 8/5

19:40-14:10

Nonstop10h 30m

£402

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 22/4

14:10-20:51

1 stop14h 41m

San Francisco

Tue 29/4

08:30-06:35

1 stop14h 05m

£403

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 28/4

06:30-11:45

1 stop13h 15m

San Francisco

Mon 5/5

21:20-15:40

Nonstop10h 20m

£404

EdinburghSan Francisco

EDI - SFO

EDISFO

Edinburgh Turnhouse

Mon 21/4

08:55-17:15

1 stop16h 20m

San Francisco

Mon 28/4

19:30-16:40

1 stop13h 10m

£410

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Wed 14/5

18:35-16:10

1 stop29h 35m

San Francisco

Tue 20/5

14:00-17:50

1 stop19h 50m

£410

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 9/5

08:40-16:25

1 stop15h 45m

San Francisco

Fri 23/5

07:25-11:10

1 stop19h 45m

£412

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Mon 28/4

15:05-00:10

1 stop17h 05m

San Francisco

Sun 11/5

07:21-07:50

1 stop16h 29m

£412

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 60 results
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6

Best time to book a flight from United Kingdom to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from United Kingdom 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 the United Kingdom to San Francisco

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

Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Francisco (average of £538). Flying from United Kingdom to San Francisco in July is currently the most expensive (average of £803). 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 GB to SFO?

Find hourly flight availability from United Kingdom to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 March 2025.

When flying from United Kingdom to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in San Francisco by month

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

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

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

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September 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 11.0 C).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 26 March 2025.
Read reviews from past customers who have flown ANA, Delta and Air New Zealand from United Kingdom to San Francisco. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.
ANA
8.3
Very Good
828 reviews
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.
Delta
8.0
Very Good
7,891 reviews
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.
Air New Zealand
7.9
Good
456 reviews
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.
KLM
7.8
Good
1,319 reviews
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.
Air Transat
7.8
Good
381 reviews
ANA
8.3
Very Good
828 reviews
Check prices

Entertainment

7.9

Crew

8.7

Overall

8.3

Comfort

8.2

Boarding

8.5

Food

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Mar 2025

SFO - HND

Don't bother with economy, it's so small!!! I'm a small person and I was cramped in the middle seat on a 11 hour flight. Not fun. Go for business or first class for such a long flight if you can or be prepared to have trouble moving when you stand up. Also be prepared to have trouble sleeping too. Crew was awesome though, they were helpful and provided excellent service.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to San Francisco. 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 into for flights to San Francisco from United Kingdom?

    If you book a flight to San Francisco from United Kingdom, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at £287. Vueling flights start at £300 while deals on TAP AIR PORTUGAL start at £362 one-way.

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

    Most travelers choose London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco when deciding on the best route from United Kingdom to San Francisco.

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

    The top 3 most reliable airlines when flying from United Kingdom to San Francisco are American Airlines (91%), Aer Lingus (91%) and Alaska Airlines (91%).

  • What are the cheapest flights from United Kingdom to San Francisco?

    On average you can expect to pay £1,804 for a flight from United Kingdom to San Francisco. The cheapest flight overall is £389 while the most popular route, (London Heathrow - San Francisco) is currently priced at £331.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from United Kingdom to San Francisco 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 United Kingdom to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from United Kingdom to San Francisco (average of £538). Flying from United Kingdom to San Francisco in July is currently the most expensive (average of £803). 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 the United Kingdom?

Book flights to the United Kingdom if you plan to visit one of these locations
Santa Cruz
San Mateo
Los Banos
Vallejo
Newark
South San Francisco
Pacific Grove
Union City

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Alternative routes for United Kingdom to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from United Kingdom to San Francisco

Discover the top 10 airlines that operate flights from United Kingdom to San Francisco. 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 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£247Average£555FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£289Average£591FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£358Average£515FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£361Average£556FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£367Average£553FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Virgin AtlanticCheapest£372Average£595FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£380Average£616FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Brussels AirlinesCheapest£384Average£508FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£384Average£535FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£388Average£613FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find United Kingdom to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to San Francisco.

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

Yes, we can. To see specific flights from United Kingdom to San Francisco with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from United Kingdom to San Francisco 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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