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$494+ Cheap flights from London (LON) to San Francisco (SFO)

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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from London to San Francisco are usually found in February or November, booked 83 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from London to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to San Francisco (SFO). 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 January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$533
(Delta)

One-way from

$494
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$628

Good round-trip deal

$556 or less

Good one-way deal

$621 or less
Provider with most accurate pricing for London (LON)-San Francisco flight deals.
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Provider most trusted by Cheapflights users for London (LON)-San Francisco flights.
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From London (LON) to San Francisco
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One-way flight from London (LON) to San Francisco
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Price to beat on a round-trip flight from London (LON) to San Francisco.
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Price to beat on a one-way flight from London (LON) to San Francisco.
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Find flight deals from London to San Francisco

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This oojo deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/86:40 pmLHR - SFO
1 stop29h 45mMultiple Airlines
Fri 2/212:55 pmSFO - LHR
1 stop14h 35mMultiple Airlines
Deal found 1/21$527
This CrystalTravel deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2311:40 amLHR - SFO
Nonstop11h 05mVirgin Atlantic
Sat 2/84:40 pmSFO - LHR
Nonstop10h 15mVirgin Atlantic
Deal found 1/21$528
This Gotogate deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/244:40 pmLGW - SFO
1 stop30h 15mTAP AIR PORTUGAL
Fri 1/317:15 pmSFO - LGW
2 stops29h 05mTAP AIR PORTUGAL
Deal found 1/21$532
This Delta deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/26:30 amLHR - SFO
1 stop13h 20mDelta
Thu 2/2712:40 amSFO - LHR
1 stop22h 25mDelta
Deal found 1/21$533
This Kiwi.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/66:40 pmLGW - SFO
1 stop29h 45mSWISS
Mon 2/107:25 pmSFO - LGW
1 stop14h 25mSWISS
Deal found 1/21$533
This World Air Fares deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/269:25 amLCY - SFO
1 stop15h 00mSWISS
Tue 12/27:25 pmSFO - LCY
1 stop13h 40mSWISS
Deal found 1/20$533
This Kiwi.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/258:30 amLHR - SFO
1 stop15h 30mLufthansa
Sun 2/28:25 amSFO - LHR
1 stop14h 15mLufthansa
Deal found 1/19$534
This Kiwi.com deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/248:55 amLHR - SFO
1 stop15h 30mSWISS
Sun 3/238:25 pmSFO - LHR
1 stop14h 25mSWISS
Deal found 1/19$535
This TravelUp deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/119:15 amLCY - SFO
1 stop15h 10mMultiple Airlines
Wed 2/192:40 pmSFO - LCY
1 stop18h 00mMultiple Airlines
Deal found 1/20$537
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/281:45 pmLHR - SFO
Nonstop11h 10mUnited Airlines
Sun 2/165:25 pmSFO - LHR
Nonstop10h 35mUnited Airlines
Deal found 1/19$540
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/196:50 amLTN - SFO
1 stop16h 40mMultiple Airlines
Wed 2/265:20 pmSFO - LTN
1 stop21h 55mMultiple Airlines
Deal found 1/20$543
This Brussels Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/310:05 amLHR - SFO
Nonstop11h 10mBrussels Airlines
Sat 5/312:55 pmSFO - LHR
Nonstop10h 30mBrussels Airlines
Deal found 1/21$544

Find flights from London to San Francisco within your budget

Customize your flight search to find flights from London 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 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/17

6:30 am-11:50 am

1 stop13h 20m

San Francisco

Sun 2/23

12:40 am-7:05 am

1 stop22h 25m

$533

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Thu 2/6

6:40 pm-4:25 pm

1 stop29h 45m

San Francisco

Mon 2/10

7:25 pm-5:50 pm

1 stop14h 25m

$533

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 2/14

11:10 am-8:07 pm

1 stop16h 57m

San Francisco

Sun 2/23

12:50 pm-7:25 am

Nonstop10h 35m

$534

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Mon 2/24

9:30 pm-2:40 pm

2 stops49h 10m

San Francisco

Mon 3/3

4:40 pm-3:45 pm

1 stop15h 05m

$534

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Thu 2/20

9:25 am-4:25 pm

1 stop15h 00m

San Francisco

Thu 2/27

7:25 pm-5:05 pm

1 stop13h 40m

$534

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/24

8:55 am-4:25 pm

1 stop15h 30m

San Francisco

Sun 3/23

8:25 pm-5:50 pm

1 stop14h 25m

$535

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 2/6

6:30 am-11:50 am

1 stop13h 20m

San Francisco

Tue 4/1

1:36 pm-10:00 am

1 stop12h 24m

$536

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Tue 2/11

9:15 am-4:25 pm

1 stop15h 10m

San Francisco

Wed 2/19

2:40 pm-4:40 pm

1 stop18h 00m

$537

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 3/1

5:30 pm-3:40 pm

2 stops30h 10m

San Francisco

Sat 3/8

5:30 pm-9:35 pm

2 stops20h 05m

$538

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 2/9

1:45 pm-4:55 pm

Nonstop11h 10m

San Francisco

Sun 2/16

12:50 pm-7:25 am

Nonstop10h 35m

$541

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 60 results
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Compare providers for flights from London to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to San Francisco in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
ScholarTripPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.
Estimated round-trip 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.

Travel insights for flights from London to San Francisco

Get recent, data-driven insights about flights from London to San Francisco including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from London to San Francisco. Price data was last updated on January 17, 2025.

The price you pay for your flight from London to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 83 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 London to San Francisco?

Currently, January is the cheapest month in which you can book a flight from London to San Francisco (average of $276). Flying from London to San Francisco in June is currently the most expensive (average of $405). 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 LON to SFO?

Find hourly flight availability from London 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 January 21, 2025.

It’s optimal to fly from London to San Francisco at noon. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from London to San Francisco. Price data was last updated on April 28, 2024.

Travelers seeking maximum savings on their London to San Francisco flight should consider departing on Thursday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to San Francisco

Explore weekly flight availability from London to San Francisco. 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 January 21, 2025.

The most flights from LON to SFO are scheduled on a Monday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (26 on average).

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 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 January 21, 2025.
See what other customers who have flown with SWISS, ITA Airways and Delta from London to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air New Zealand
7.9
Good
485 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,286 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

7.9

Comfort

8.0

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from London 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 London?

    Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 30 daily inbound flights from London from 12 different airlines.

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

    Delta, at $533, was found to be the cheapest airline from London to San Francisco.Alternate airlines to your destination round-trip include SWISS and United Airlines. You may be able to fly from London to San Francisco for 21% less than the average price by searching for these airlines.

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

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $494. However, be on the lookout for offers from Vueling and TAP AIR PORTUGAL, as they are both options that can get you from London to San Francisco for a low price.

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

    When deciding which route to take from London to San Francisco consider London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco as they are the most popular.

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

    No one likes to see their flight delayed. When booking a flight from London to San Francisco consider choosing Air Canada (63%), Austrian Airlines (63%) or United Airlines (63%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from London to San Francisco is generally $1,311, our data shows the cheapest flight currently is $518. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $446 for that flight.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London to San Francisco (average of $276). Flying from London to San Francisco in June is currently the most expensive (average of $405). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Roseville
Mountain View
Turlock
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Fairfield
Manteca
Sausalito
Watsonville
Hayward
Richmond
Hollister
South San Francisco
Antioch
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Elk Grove
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Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London 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 London to San Francisco

Discover the top 10 airlines that operate flights from London 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 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$415Average$680FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$476Average$692FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$513Average$819FlexibilityNo cancel feeOn-time70%
DeltaCheapest$519Average$715FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$525Average$674FlexibilityNo cancel feeOn-time76%
FinnairCheapest$525Average$571FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$544Average$736FlexibilityNo cancel feeOn-time71%
Brussels AirlinesCheapest$546Average$633FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$549Average$719FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$551Average$755FlexibilityNo cancel feeOn-time72%
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