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$330+ Cheap flights from San Francisco (SFO) to London (LON)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
Sep 15 — Sep 221
Tue 9/15
Tue 9/22
1 adult, Economy
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Find cheap flights from San Francisco to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from San Francisco to London are usually found in February or January, booked 23 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap 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 August 16, 2026.

This Ticket deal was found by Cheapflights users on 8/16. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:30 pm -
1 stop17h 15m
Tue 10/61:45 pm -
1 stop32h 50m
Deal found 8/16$637
This Gotogate deal was found by Cheapflights users on 8/14. 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.
Thu 9/174:30 pm -
1 stop22h 25m
Mon 9/281:45 pm -
1 stop31h 50m
Deal found 8/14$641
This Flightnetwork deal was found by Cheapflights users on 8/13. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:30 pm -
1 stop18h 20m
Mon 9/286:45 pm -
1 stop26h 50m
Deal found 8/13$658
This Vliegwinkel deal was found by Cheapflights users on 8/16. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:30 pm -
1 stop33h 15m
Tue 10/64:25 pm -
1 stop30h 10m
Deal found 8/16$659
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Mon 10/54:30 pm -
2 stops19h 25m
Wed 10/148:35 pm -
2 stops25h 55m
Deal found 8/14$662
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Mon 10/54:30 pm -
2 stops18h 55m
Wed 10/149:15 pm -
2 stops25h 15m
Deal found 8/14$666
This Booking.com deal was found by Cheapflights users on 8/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/134:20 pm -
1 stop15h 15m
Wed 10/214:25 pm -
1 stop30h 05m
Deal found 8/13$671
This Booking.com deal was found by Cheapflights users on 8/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:20 pm -
1 stop15h 15m
Wed 10/214:25 pm -
1 stop30h 05m
Deal found 8/15$672
This Mytrip deal was found by Cheapflights users on 8/15. 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.
Tue 10/64:30 pm -
2 stops19h 25m
Wed 10/148:35 pm -
2 stops25h 55m
Deal found 8/15$672
This Trip.com deal was found by Cheapflights users on 8/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:20 pm -
1 stop15h 15m
Tue 11/104:35 pm -
1 stop30h 10m
Deal found 8/11$673
This oojo deal was found by Cheapflights users on 8/12. 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.
Tue 10/64:20 pm -
1 stop15h 15m
Tue 10/274:35 pm -
1 stop30h 10m
Deal found 8/12$675
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Mon 10/54:30 pm -
2 stops19h 05m
Wed 10/149:20 pm -
2 stops25h 10m
Deal found 8/14$688

Find 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 August 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$605
(Gotogate)

One-way from

$330
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$943

Good round-trip deal

$956 or less

Good one-way deal

$458 or less
Provider with most accurate pricing for San Francisco-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-London (LON) flights.
Search Deals
From San Francisco to London (LON)
Search Deals
One-way flight from San Francisco to London (LON)
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($216 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to London (LON).
Search Deals
Price to beat on a one-way flight from San Francisco to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated August 16, 2026.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoLondon

SFO San Francisco - LTN London Luton

SFOLTN

San Francisco

Mon 9/28

4:45 pm-10:50 pm

2 stops22h 05m

London Luton

Mon 10/5

2:25 pm-2:40 pm

2 stops32h 15m

$761

San FranciscoLondon

SFO San Francisco - LTN London Luton

SFOLTN

San Francisco

Tue 9/8

11:10 am-7:55 pm

2 stops24h 45m

London Luton

Tue 9/15

8:35 pm-4:15 pm

2 stops27h 40m

$779

San FranciscoLondon

SFO San Francisco - LTN London Luton

SFOLTN

San Francisco

Mon 9/21

8:10 am-12:20 pm

2 stops20h 10m

London Luton

Tue 10/6

5:45 pm-12:40 pm

2 stops26h 55m

$791

San FranciscoLondon

SFO San Francisco - LGW London Gatwick

SFOLGW

San Francisco

Mon 9/21

4:30 pm-11:20 am

2 stops34h 50m

London Gatwick

Tue 10/6

4:25 pm-2:35 pm

1 stop30h 10m

$792

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 11/24

12:50 pm-7:25 am

Nonstop10h 35m

London Heathrow

Thu 12/10

6:35 am-2:50 pm

1 stop16h 15m

$853

San FranciscoLondon

SFO San Francisco - LTN London Luton

SFOLTN

San Francisco

Mon 10/19

12:15 pm-11:00 pm

3 stops26h 45m

London Luton

Fri 10/23

7:40 pm-12:40 pm

2 stops25h 00m

$866

San FranciscoLondon

SFO San Francisco - LTN London Luton

SFOLTN

San Francisco

Wed 9/30

7:35 pm-12:30 am

2 stops20h 55m

London Luton

Wed 10/7

7:20 pm-6:41 pm

3 stops31h 21m

$871

San FranciscoLondon

SFO San Francisco - LGW London Gatwick

SFOLGW

San Francisco

Wed 9/9

4:35 pm-9:45 am

1 stop33h 10m

London Gatwick

Mon 9/14

9:15 pm-2:35 pm

2 stops49h 20m

$891

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 11/1

12:50 pm-7:25 am

Nonstop10h 35m

London Heathrow

Wed 11/18

11:10 am-7:35 pm

1 stop16h 25m

$892

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 11/11

12:50 pm-7:25 am

Nonstop10h 35m

London Heathrow

Wed 11/25

6:35 am-2:50 pm

1 stop16h 15m

$892

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from San Francisco to London

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 San Francisco to London in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
JetabroadPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 San Francisco-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-London 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 San Francisco-London 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 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 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.

Cheapflights Insights

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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to London (average of $647). Flying from San Francisco to London in June is currently the most expensive (average of $1,280). 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 August 16, 2026.

One of the essential ways to save on airfare from San Francisco to London is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 10% on airfare.

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 August 16, 2026.

The most flights from SFO to LON are scheduled on a Monday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).

How much does it cost to fly round-trip from San Francisco to London?

Airfare is below average for this route at the moment.
San Francisco to London flights typically cost between $736 and $1,098 in January.
The cheapest round-trip price found within the last 5 days was $605 on Multiple Airlines (Jan 12-Feb 6).

What’s the top layover airport for flights from San Francisco to London?

Share of 1-stop round-trip flights from San Francisco to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Copenhagen (CPH) – chosen by Cheapflights users on 64% of 1-stop itineraries from San Francisco to London on Cheapflights.

What’s the cheapest layover airport for flights from San Francisco to London?

Average round-trip fare for 1-stop flights from San Francisco to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $620.

What’s the fastest layover option from San Francisco to London?

Shortest average travel time for 1-stop one-way flights from San Francisco to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 13h 25m.

Which airport typically offers the quickest layover for flights from San Francisco to London?

Average layover duration for 1-stop one-way flights from San Francisco to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Istanbul (IST) offer the fastest connection on this route, with an average layover time of 2h 13m.

How often are flights from San Francisco to London delayed?

About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 153 minutes.

What is the most punctual flight time for San Francisco to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Francisco to London flights?

Over the last year, British Airways have had the lowest number of delays on this route, with just 8% of flights being delayed.

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

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 day to fly from San Francisco to London?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to London. Price data was last updated on August 8, 2026.

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

The best insider tips for San Francisco to London flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to London trip
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Blane Bachelor

Blane Bachelor

Expert on Virgin Atlantic and Lufthansa

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 August 16, 2026.
Read reviews from past customers who have flown Delta,Virgin Atlantic, andScandinavian Airlines from San Francisco to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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
7.8
Good
8,505 reviews
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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.
Virgin Atlantic
7.5
Good
694 reviews
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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.
Scandinavian Airlines
7.4
Good
1,952 reviews
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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.
United Airlines
7.4
Good
10,106 reviews
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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.
British Airways
6.7
Okay
8,169 reviews
Delta
7.8
Good
8,505 reviews

Food

7.2

Overall

7.8

Crew

8.5

Entertainment

7.8

Boarding

8.1

Comfort

7.8

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?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to London. On average, San Francisco has 38 outbound flights to London per day from 21 airlines. San Francisco is conveniently located just 11.0 mi from San Francisco’s city center.

  • How long is the flight from San Francisco to London?

    A quick flight from San Francisco to London can take about 10h 35m. TAP AIR PORTUGAL provides one of the quickest options available for as low as $853. The distance between San Francisco and London is about 5350 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $400, Iberia will fly you from San Francisco to London and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from TAP AIR PORTUGAL and Virgin Atlantic - these airlines can fly you to your destination from $434 and $454, respectively. You may be able to fly from San Francisco to London for 53% less than the average price by searching for these airlines.

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

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $213. Users have also found prices from $229 and $236 on KLM and WestJet, respectively.

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

    The most popular route from San Francisco to London is San Francisco - London Heathrow. You may also consider San Francisco - London Gatwick or San Francisco - London City.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Francisco to London on time: Air Canada (83%), Austrian Airlines (83%), United Airlines (83%).

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

    On average you can expect to pay $3,641 for a flight from San Francisco to London. The cheapest flight overall is $318 while the most popular route, (San Francisco - London Heathrow) is currently priced at $605.

  • Where are the most common layover locations when flying from San Francisco to London?

    San Francisco to London flights have a layover in Copenhagen most of the time.

  • What are some popular things to do or see while on a layover in Copenhagen?

    Tivoli, Amager Square, and Kongens Nytorv are the most popular attractions in Copenhagen if you're in need of something to do during your layover. Tivoli, Amager Square, and Kongens Nytorv can be accessed by traveling approximately 5.1 mi, 5.2 mi, and 5.1 mi, respectively from Kastrup Copenhagen. Travelers can book a car rental at Kastrup Copenhagen for about $50 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for San Francisco to London flights?

    San Francisco to London flights that have layovers will least frequently stop in New York.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from San Francisco to London (average of $647). Flying from San Francisco to London in June is currently the most expensive (average of $1,280). 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
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
Harlow

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 2,558,603 searches. Data last updated August 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$400Average$730FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$434Average$578FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$454Average$933FlexibilityNo cancel feeOn-time72%
Alaska AirlinesCheapest$495Average$989FlexibilityNo cancel feeOn-time75%
DeltaCheapest$510Average$962FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$525Average$1,088FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$536Average$830FlexibilityNo cancel feeOn-time77%
FinnairCheapest$584Average$825FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$585Average$1,080FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$586Average$858FlexibilityNo cancel feeOn-time70%

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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.