Find flights
When to book
FAQs

Cheap flights from San Francisco to London, ON from C$ 440

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
24 May — 31 May1
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 24 April 2026.

Fri 10/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Tue 14/72:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Deal found 23/4C$ 440
Tue 12/56:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Sun 17/56:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 22/4C$ 473
Tue 21/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Thu 23/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 23/4C$ 487
Mon 31/87:30 p.m.
SFO
-
YXU
2 stops13h 15m
Air Canada
Wed 2/95:40 a.m.
YXU
-
SFO
1 stop9h 52m
Air Canada
Deal found 21/4C$ 517
Mon 31/86:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Wed 2/96:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Deal found 19/4C$ 535
Fri 10/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
Multiple Airlines
Mon 13/75:55 p.m.
YXU
-
SFO
2 stops29h 45m
Multiple Airlines
Deal found 23/4C$ 625
Fri 10/76:05 p.m.
SFO
-
YXU
1 stop8h 15m
WestJet
Sun 12/72:40 p.m.
YXU
-
SFO
2 stops10h 15m
WestJet
Deal found 23/4C$ 655

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 24 April 2026.

Round-trip from

C$ 440
WestJet
  • WestJet
  • 10/7-13/7
  • 2 total stops
  • 39h 15m 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 24 April 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
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 21/7

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

1 stop7h 45m

London

Thu 23/7

6:10 a.m.-12:00 p.m.

1 stop8h 50m

C$ 487

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 31/8

7:30 p.m.-11:45 a.m.

2 stops13h 15m

London

Wed 2/9

5:40 a.m.-12:32 p.m.

1 stop9h 52m

C$ 517

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 21/7

10:47 p.m.-9:20 a.m.

1 stop7h 33m

London

Thu 23/7

6:20 p.m.-1:57 a.m.

2 stops10h 37m

C$ 694

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/7

11:47 p.m.-2:55 p.m.

2 stops12h 08m

London

Tue 14/7

5:10 a.m.-2:09 p.m.

2 stops11h 59m

C$ 705

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 31/8

6:00 a.m.-5:20 a.m.

1 stop20h 20m

London

Wed 2/9

6:10 a.m.-12:00 p.m.

1 stop8h 50m

C$ 900

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 6/6

4:30 p.m.-11:43 a.m.

1 stop16h 13m

London

Sat 13/6

5:10 a.m.-10:50 a.m.

1 stop8h 40m

C$ 938

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/7

6:34 p.m.-2:55 p.m.

2 stops17h 21m

London

Mon 13/7

6:20 p.m.-1:57 a.m.

2 stops10h 37m

C$ 1,077
Cheapest one-way

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 21/5

10:57 a.m.-5:20 a.m.

3 stops39h 23m

C$ 477
Quickest one-way

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 21/5

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

1 stop7h 45m

C$ 572

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/4

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 can get you from San Francisco to London, Ontario in just under 8h 15m. Your travel time can differ by up to . San Francisco and London, Ontario are separated by a distance of 3508 km.

  • 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

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.

Alternative routes for San Francisco to London

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Pearson Intl flights
San Francisco to Pearson Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
San Diego to Pearson Intl flights
San Francisco to Toronto Island flights
Los Angeles to Toronto Island flights
Ontario to Pearson Intl flights
San Diego to Pierre Elliott Trudeau Intl flights
San Jose to Pearson Intl flights
Las Vegas to Pearson Intl flights
Sacramento to Pearson Intl flights
San Francisco to Hamilton flights
Los Angeles to Hamilton flights
Oakland to Pearson Intl flights
Santa Ana to Pearson Intl flights
Ontario to Pierre Elliott Trudeau Intl flights
Los Angeles to Region of Waterloo Intl flights
Las Vegas to Pierre Elliott Trudeau Intl flights
Burbank to Pearson Intl flights
Los Angeles to Ottawa flights
San Jose to Pierre Elliott Trudeau Intl flights
Sacramento to Pierre Elliott Trudeau Intl flights
Santa Ana to Pierre Elliott Trudeau Intl flights
San Francisco to Ottawa flights
Oakland to Pierre Elliott Trudeau Intl flights
Fresno to Pearson Intl flights
Las Vegas to Hamilton flights
Reno to Pearson Intl flights
Burbank to Pierre Elliott Trudeau Intl flights
San Diego to Ottawa flights
Palm Springs to Pearson Intl flights
Las Vegas to Region of Waterloo Intl flights
Las Vegas to Ottawa flights
Santa Ana to Ottawa flights
Santa Barbara to Pierre Elliott Trudeau Intl flights
Sacramento to Ottawa flights
San Jose to Ottawa flights
Tijuana to Pearson Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from San Francisco today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Francisco to London?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from San Francisco.

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.

Can Cheapflights notify me if prices for flights from San Francisco to London become cheaper?

Of course! You can now track prices for flights from San Francisco to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.