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Cheap flights from San Francisco to London, ON from C$ 259

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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
13 Jul — 20 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

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 13 June 2026.

Thu 16/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Thu 23/75:55 p.m.
YXU
-
SFO
1 stop25h 45m
WestJet
Deal found 9/6C$ 620
Fri 21/86:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Thu 27/86:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 12/6C$ 629
Tue 13/1011:35 a.m.
SFO
-
YXU
1 stop7h 05m
Air Canada
Thu 15/105:40 a.m.
YXU
-
SFO
1 stop9h 54m
Air Canada
Deal found 9/6C$ 653
Tue 15/94:35 p.m.
SFO
-
YXU
2 stops13h 45m
Air Canada
Wed 16/93:30 p.m.
YXU
-
SFO
1 stop8h 29m
Air Canada
Deal found 11/6C$ 660
Sun 2/86:00 a.m.
SFO
-
YXU
1 stop7h 45m
Multiple Airlines
Sat 8/86:10 a.m.
YXU
-
SFO
2 stops17h 30m
Multiple Airlines
Deal found 11/6C$ 664
Sun 2/810:47 p.m.
SFO
-
YXU
1 stop7h 30m
United Airlines
Sat 8/85:40 a.m.
YXU
-
SFO
2 stops14h 55m
United Airlines
Deal found 13/6C$ 839

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 13 June 2026.

Round-trip from

C$ 620

One-way from

C$ 259
WestJet
  • WestJet
  • 16/7-23/7
  • 2 total stops
  • 33h 30m total
  • San Francisco to London
Search Deals
WestJet
  • WestJet
  • 2/8
  • 1 total stop
  • 7h 45m total
  • San Francisco to London
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 629,999 searches. Data last updated 13 June 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 - YXU

SFOYXU

San Francisco

Thu 16/7

6:00 a.m.-4:45 p.m.

1 stop7h 45m

London

Thu 23/7

5:55 p.m.-4:40 p.m.

1 stop25h 45m

C$ 620
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 15/9

11:35 a.m.-9:40 p.m.

1 stop7h 05m

London

Wed 16/9

5:40 a.m.-10:39 a.m.

1 stop7h 59m

C$ 653

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 13/10

11:35 a.m.-9:40 p.m.

1 stop7h 05m

London

Thu 15/10

5:40 a.m.-3:21 p.m.

2 stops12h 41m

C$ 660

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 2/8

10:47 p.m.-9:17 a.m.

1 stop7h 30m

London

Sat 8/8

5:40 a.m.-5:35 p.m.

2 stops14h 55m

C$ 839
Cheapest one-way
Quickest one-way

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 2/8

6:00 a.m.-4:45 p.m.

1 stop7h 45m

C$ 259

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 1/8

12:50 a.m.-8:32 p.m.

2 stops16h 42m

C$ 393

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Sorted by cheapest first

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.

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.

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

    WestJet and Air Canada can get you from San Francisco to London, Ontario in just under 7h 05m. Your travel time can differ by up to 40m. San Francisco and London, Ontario are separated by a distance of 3508 km. This flight may include one or multiple stops.

  • 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.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

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Can Cheapflights find flights from San Francisco to London with no change fees?

Need flexible booking options for your flight to London from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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