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$191+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
1 adult, Economy
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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 March 15, 2026.

This WestJet deal was found by Cheapflights users on 3/12. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Sat 5/306:00 am
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 3/12$332
This oojo deal was found by Cheapflights users on 3/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:10 pm
YXU
-
SFO
1 stop19h 00m
WestJet
Wed 4/291:00 pm
SFO
-
YXU
1 stop13h 20m
WestJet
Deal found 3/11$349
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:10 pm
YXU
-
SFO
1 stop19h 00m
WestJet
Thu 4/301:00 pm
SFO
-
YXU
1 stop13h 20m
WestJet
Deal found 3/11$355
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:10 pm
YXU
-
SFO
1 stop19h 00m
WestJet
Fri 5/11:00 pm
SFO
-
YXU
1 stop13h 20m
WestJet
Deal found 3/11$356
This Air Canada deal was found by Cheapflights users on 3/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/159:25 am
YXU
-
SFO
1 stop8h 55m
Air Canada
Wed 4/292:30 pm
SFO
-
YXU
1 stop15h 14m
Air Canada
Deal found 3/12$364
This Air Canada deal was found by Cheapflights users on 3/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/79:25 am
YXU
-
SFO
1 stop8h 55m
Air Canada
Wed 4/292:30 pm
SFO
-
YXU
1 stop15h 14m
Air Canada
Deal found 3/12$365
This FlightHub deal was found by Cheapflights users on 3/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:00 am
YXU
-
SFO
1 stop31h 05m
WestJet
Wed 4/291:00 pm
SFO
-
YXU
1 stop13h 20m
WestJet
Deal found 3/11$369
This FlightHub deal was found by Cheapflights users on 3/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:10 pm
YXU
-
SFO
1 stop19h 00m
WestJet
Tue 4/286:00 am
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 3/11$373
This oojo deal was found by Cheapflights users on 3/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/105:55 pm
YXU
-
SFO
1 stop21h 05m
WestJet
Sun 5/176:00 am
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 3/14$374

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 March 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$332
(WestJet)

One-way from

$191
(Air Canada)

Popular in

March

Cheapest in

August

Average price

$806
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. 27% potential increase in price ($152 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 15, 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
Quickest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 5/29

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Sat 5/30

6:00 am-4:45 pm

1 stop7h 45m

$332

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 4/24

5:10 am-9:34 pm

3 stops19h 24m

San Francisco

Fri 5/1

10:55 pm-9:38 pm

2 stops19h 43m

$448

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/15

5:10 am-9:34 pm

3 stops19h 24m

San Francisco

Fri 5/1

11:56 pm-5:33 pm

2 stops14h 37m

$448

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 4/25

5:10 am-3:32 pm

2 stops13h 22m

San Francisco

Sat 5/2

10:42 pm-11:43 am

1 stop10h 01m

$461

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/15

5:10 am-9:34 pm

3 stops19h 24m

San Francisco

Wed 4/29

5:00 am-9:19 pm

2 stops13h 19m

$476

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 4/13

5:40 pm-1:35 am

2 stops10h 55m

San Francisco

Mon 4/27

11:52 pm-5:04 pm

2 stops14h 12m

$482

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/15

5:10 am-9:34 pm

3 stops19h 24m

San Francisco

Sat 4/25

12:45 am-5:04 pm

2 stops13h 19m

$484

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/8

9:25 am-6:38 pm

2 stops12h 13m

San Francisco

Mon 4/27

11:52 pm-9:19 pm

2 stops18h 27m

$489

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 4/13

5:40 pm-1:17 am

2 stops10h 37m

San Francisco

Sun 4/26

10:50 pm-5:04 pm

2 stops15h 14m

$489

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 5/29

5:40 am-10:50 am

1 stop8h 10m

San Francisco

Sat 5/30

12:50 pm-8:53 am

2 stops17h 03m

$497

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 19 resultsSorted by cheapest first
1
2
  • 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

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

Currently, August is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $159). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of $253). 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.

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 United Airlines fly from London, Ontario to San Francisco in about 8h 50m. The time it takes to get you to your destination can typically vary by up to 10h 34m. 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.

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

    Currently, August is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of $159). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of $253). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
South San Francisco
Santa Clara
Santa Cruz
Livermore
Roseville
Watsonville
San Bruno
Sunnyvale
Vacaville
Turlock
San Carlos
San Ramon
Redwood City
Daly City
Rancho Cordova
San Lorenzo
Davis
Hollister
Manteca
Union City

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