$347+ Cheap flights from San Francisco (SFO) to London, ON (YXU)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
Nov 26 — Dec 31
Round-trip
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Francisco to London
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Best
Last-minute
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Cheapest flights from San Francisco to LondonExplore 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 October 27, 2026.
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 October 27, 2026.
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:25 am -
1 stop9h 02m
Sat 11/219:05 pm -
1 stop17h 05m
Deal found 10/22![Air Canada logo]()
$474
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sun 12/612:10 am -
2 stops11h 32m
Mon 12/143:20 pm -
1 stop9h 10m
Deal found 10/23![United Airlines logo]()
$661
This Air Canada deal was found by Cheapflights users on 10/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:40 pm -
1 stop12h 57m
Mon 11/93:25 pm -
1 stop9h 05m
Deal found 10/23![Air Canada logo]()
$667
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 12/912:10 am -
2 stops11h 32m
Thu 12/175:30 am -
1 stop8h 40m
Deal found 10/26![United Airlines logo]()
$685
This Air Canada deal was found by Cheapflights users on 10/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:10 am -
1 stop9h 17m
Mon 11/99:15 am -
1 stop9h 25m
Deal found 10/24![Air Canada logo]()
$940
Best flights from San Francisco to LondonDiscover carefully curated flight deals from San Francisco to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.
Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2026.
This Air Canada deal was found by Cheapflights users on 10/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/186:30 am -
2 stops12h 22m
Thu 1/213:20 pm -
1 stop9h 00m
Deal found 10/26![Air Canada logo]()
$410
This United deal was found by Cheapflights users on 10/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2210:35 pm -
2 stops13h 04m
Sat 4/245:30 am -
2 stops11h 17m
Deal found 10/22![Multiple Airlines logo]()
$550
This WestJet deal was found by Cheapflights users on 10/24. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/184:40 pm -
1 stop9h 55m
Thu 1/216:40 am -
1 stop12h 10m
Deal found 10/24![WestJet logo]()
$577
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sun 12/612:10 am -
2 stops11h 32m
Mon 12/143:20 pm -
1 stop9h 10m
Deal found 10/23![United Airlines logo]()
$661
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:25 am -
1 stop9h 02m
Sat 11/219:05 pm -
1 stop17h 05m
Deal found 10/22![Air Canada logo]()
$474
Last-minute flights from San Francisco to LondonDiscover last-minute flight deals from San Francisco to London. Data last updated October 27, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to London. Data last updated October 27, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 10/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:10 am -
1 stop9h 17m
Mon 11/99:15 am -
1 stop9h 25m
Deal found 10/24![Air Canada logo]()
$940
This Air Canada deal was found by Cheapflights users on 10/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/64:40 pm -
1 stop12h 57m
Mon 11/93:25 pm -
1 stop9h 05m
Deal found 10/23![Air Canada logo]()
$667
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 11/611:15 pm -
2 stops18h 12m
Mon 11/99:05 pm -
2 stops25h 53m
Deal found 10/23![United Airlines logo]()
$989
This Air Canada deal was found by Cheapflights users on 10/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:25 am -
1 stop9h 02m
Tue 11/103:25 pm -
1 stop9h 05m
Deal found 10/24![Air Canada logo]()
$968
This Air Canada deal was found by Cheapflights users on 10/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:25 am -
1 stop9h 02m
Sun 11/89:05 pm -
1 stop17h 05m
Deal found 10/24![Air Canada logo]()
$992
This Air Canada deal was found by Cheapflights users on 10/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/148:25 am -
1 stop9h 02m
Sat 11/219:05 pm -
1 stop17h 05m
Deal found 10/22![Air Canada logo]()
$474
One-way flights from San Francisco to LondonSearch for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated October 27, 2026.
This Air Canada deal was found by Cheapflights users on 10/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/314:40 pm -
1 stop12h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Air Canada logo]()
$347
This Air Canada deal was found by Cheapflights users on 10/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/282:45 pm -
2 stops20h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Air Canada logo]()
$371
This Air Canada deal was found by Cheapflights users on 10/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/174:40 pm -
1 stop12h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Air Canada logo]()
$393
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Wed 12/305:00 am -
2 stops13h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![United Airlines logo]()
$397
This Air Canada deal was found by Cheapflights users on 10/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3011:30 pm -
2 stops12h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Air Canada logo]()
$421
This WestJet deal was found by Cheapflights users on 10/23. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/174:40 pm -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$457
This WestJet deal was found by Cheapflights users on 10/23. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/214:40 pm -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![WestJet logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 10/23. 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.
Sun 11/19:15 am -
2 stops17h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sun 12/205:10 pm -
2 stops18h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$525
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Fri 12/181:55 pm -
2 stops15h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$530
This Air Canada deal was found by Cheapflights users on 10/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/224:40 pm -
1 stop12h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Air Canada logo]()
$540
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 (YXU). 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 October 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $385 (Air Canada) |
One-way from | $347 (Air Canada) |
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 7,457,451 searches. Data last updated October 27, 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
Cheapest round-trip
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Mon 12/28
2:45 pm-2:42 pm
2 stops20h 57m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$371
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Wed 12/30
5:00 am-9:52 pm
2 stops13h 52m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$397
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Fri 1/1
5:00 am-9:52 pm
2 stops13h 52m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$397
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Mon 1/18
6:30 am-9:52 pm
2 stops12h 22m
London
Thu 1/21
3:20 pm-9:20 pm
1 stop9h 00m
$410
Quickest round-trip
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Thu 12/17
4:40 pm-5:35 am
1 stop9h 55m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$457
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Sat 11/14
8:25 am-8:27 pm
1 stop9h 02m
London
Sat 11/21
9:05 pm-11:10 am
1 stop17h 05m
$474
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Sun 11/1
9:15 am-5:35 am
2 stops17h 20m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$504
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Tue 12/22
1:55 pm-8:32 am
2 stops15h 37m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$530
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Fri 12/18
1:55 pm-8:37 am
2 stops15h 42m
London
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$530
San FranciscoLondon
SFO San Francisco - YXU London
SFOYXU
San Francisco
Thu 4/22
10:35 pm-2:39 pm
2 stops13h 04m
London
Sat 4/24
5:30 am-1:47 pm
2 stops11h 17m
$550
Showing 1-10 of 15 resultsSorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-London, Ontario 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, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-London, Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-London, Ontario 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, Ontario 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.
SFO-YXU
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.
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 October 27, 2026.
Read through reviews of airlines operating flights from San Francisco to London, such as WestJet and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.1
Food
6.2
Boarding
7.4
Overall
7.2
Crew
7.9
Comfort
7.1
Reviews
1 / 20
10.0
ExcellentBrian,Aug 2023
SFO - YYC
Entertainment
6.1
Food
6.2
Boarding
7.4
Overall
7.2
Crew
7.9
Comfort
7.1
Reviews
1 / 20
10.0
ExcellentBrian,Aug 2023
SFO - YYC
Entertainment
6.1
Food
6.2
Boarding
7.4
Overall
7.2
Crew
7.9
Comfort
7.1
Reviews
1 / 20
10.0
ExcellentBrian,Aug 2023
SFO - YYC
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.
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.
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Complete your trip
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Alternative routes for San Francisco to London
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to London by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to London by cabin class
Find flights from San Francisco to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to London
Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 27, 2026.
San Francisco and London flights
Browse other San Francisco and London flight options. Last updated on October 27, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on October 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from San Francisco to London
Discover the top 2 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 7,457,451 searches. Data last updated October 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$357 | Average$674 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$366 | Average$660 | FlexibilityNo cancel fee | On-time60% |