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$182+ Cheap flights from London, ON (YXU) 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
Aug 23 — Aug 301
Sun 8/23
Sun 8/30
1 adult, Economy
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1. Tell us where you want to go

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Cheap 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 July 24, 2026.

This WestJet deal was found by Cheapflights users on 7/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Wed 9/96:05 pm
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 7/19$306
This oojo deal was found by Cheapflights users on 7/22. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Sat 9/121:00 pm
SFO
-
YXU
1 stop13h 20m
WestJet
Deal found 7/22$307
This oojo deal was found by Cheapflights users on 7/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Tue 10/136:00 am
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 7/23$310
This WestJet deal was found by Cheapflights users on 7/22. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Mon 9/146:00 am
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 7/22$321
This Air Canada deal was found by Cheapflights users on 7/22. 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.
Thu 9/105:40 am
YXU
-
SFO
2 stops12h 41m
Air Canada
Mon 9/146:40 am
SFO
-
YXU
2 stops12h 00m
Air Canada
Deal found 7/22$337
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:40 pm
YXU
-
SFO
1 stop18h 20m
WestJet
Sat 8/291:00 pm
SFO
-
YXU
2 stops21h 50m
WestJet
Deal found 7/20$339
This WestJet deal was found by Cheapflights users on 7/23. 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.
Sun 9/66:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Sun 9/136:00 am
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 7/23$342

Find flight deals from London to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) 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 July 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$306
(WestJet)

One-way from

$182
(WestJet)

Popular in

September

Cheapest in

August

Average price

$388
Provider with most accurate pricing for London-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for London-San Francisco flights.
Search Deals
From London to San Francisco
Search Deals
One-way flight from London to San Francisco
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
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 July 24, 2026.
Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 9/5

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Sat 9/12

1:00 pm-5:20 am

1 stop13h 20m

$307
Quickest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 9/10

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Mon 9/14

6:00 am-4:45 pm

1 stop7h 45m

$322

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 9/10

3:30 pm-8:59 pm

1 stop8h 29m

San Francisco

Mon 9/14

6:40 am-9:40 pm

2 stops12h 00m

$337

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 8/21

6:10 am-9:55 pm

1 stop18h 45m

San Francisco

Sat 8/29

6:00 am-4:45 pm

1 stop7h 45m

$407

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 10/8

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Tue 10/13

6:00 am-5:20 am

1 stop20h 20m

$407

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 10/9

3:30 pm-10:51 pm

2 stops10h 21m

San Francisco

Mon 10/12

11:30 pm-2:55 pm

2 stops12h 25m

$408

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/20

5:40 am-3:35 pm

2 stops12h 55m

San Francisco

Thu 8/27

10:51 pm-9:20 am

1 stop7h 29m

$415
Cheapest one-way

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 8/31

6:10 am-12:00 pm

1 stop8h 50m

$213
Quickest one-way

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 9/4

5:40 am-10:45 am

1 stop8h 05m

$221

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 9/4

8:40 pm-4:40 pm

1 stop23h 00m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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, Ontario-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, Ontario-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London, Ontario-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London, Ontario-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, Ontario-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.

Cheapflights Insights

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

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

Airfare is typical for this route at the moment.

London, Ontario to San Francisco flights typically cost between $278 and $320 in September.
The cheapest round-trip price found within the last 5 days was $306 on WestJet (Sep 2-Sep 9).

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.

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

    Airlines like WestJet and Air Canada fly from London, Ontario to San Francisco in about 8h 29m. The time it takes to get you to your destination can typically vary by up to 21m. The distance from London, Ontario to San Francisco is about 2180 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
South San Francisco
Santa Clara
Santa Cruz
Fairfield
Roseville
Burlingame
Rancho Cordova
San Bruno
Cupertino
Emeryville
Newark
Watsonville
Hayward
Redwood City
San Carlos
San Ramon
Turlock
Vallejo
San Lorenzo
Davis

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