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Cheap flights from San Francisco to London, ON from C$ 162

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 13/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YXU
27 nov. — 4 dic.1
1 adult
1 adult, Economy, 0 bags

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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 28 octubre 2025.

mar. 23/129:41 p.m.SFO - YXU
2 stops29h 53mMultiple Airlines
mié. 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 27/10C$ 705
mar. 23/129:41 p.m.SFO - YXU
2 stops29h 53mMultiple Airlines
jue. 8/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 27/10C$ 736
jue. 25/122:30 p.m.SFO - YXU
1 stop15h 16mAir Canada
vie. 9/15:15 a.m.YXU - SFO
2 stops13h 20mAir Canada
Deal found 27/10C$ 783
jue. 25/128:30 a.m.SFO - YXU
1 stop9h 51mAir Canada
jue. 8/15:15 a.m.YXU - SFO
2 stops13h 20mAir Canada
Deal found 28/10C$ 785
mié. 24/126:00 a.m.SFO - YXU
2 stops21h 34mMultiple Airlines
mié. 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 28/10C$ 790
dom. 21/1210:45 p.m.SFO - YXU
2 stops28h 49mMultiple Airlines
mié. 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 27/10C$ 792
jue. 25/1210:15 a.m.SFO - YXU
2 stops17h 19mMultiple Airlines
mié. 7/18:10 p.m.YXU - SFO
1 stop19h 02mMultiple Airlines
Deal found 27/10C$ 797
mié. 24/126:00 p.m.SFO - YXU
2 stops20h 05mAir Canada
jue. 8/15:15 a.m.YXU - SFO
1 stop8h 39mAir Canada
Deal found 27/10C$ 810
mié. 24/121:20 p.m.SFO - YXU
2 stops24h 45mAir Canada
vie. 9/15:15 a.m.YXU - SFO
2 stops13h 20mAir Canada
Deal found 28/10C$ 811

Cheap 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 28 octubre 2025.

Round-trip from

C$ 504

One-way from

C$ 162

Popular in

December

Cheapest in

March
WestJet
  • WestJet
  • 15/1-28/1
  • 2 total stops
  • 33h 36m total
  • San Francisco to London
Search Deals
13/1
  • 13/1
  • 2 total stops
  • 17h 19m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease (C$ 80 potential savings vs. average RT price).
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 28 octubre 2025.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 15/1

1:00 p.m.-6:34 a.m.

1 stop14h 34m

London

mié. 28/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 504

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 15/1

10:15 a.m.-6:34 a.m.

2 stops17h 19m

London

mié. 28/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 508

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 19/2

6:00 p.m.-8:46 a.m.

2 stops11h 46m

London

lun. 23/2

9:25 a.m.-9:39 p.m.

1 stop15h 14m

C$ 639

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

mié. 18/2

12:43 a.m.-5:05 p.m.

2 stops13h 22m

London

lun. 23/2

5:15 a.m.-11:59 p.m.

2 stops21h 44m

C$ 738

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 25/12

11:20 a.m.-8:46 a.m.

2 stops18h 26m

London

jue. 8/1

5:15 a.m.-10:54 a.m.

1 stop8h 39m

C$ 783

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

vie. 26/12

8:30 a.m.-9:21 p.m.

1 stop9h 51m

London

jue. 8/1

5:15 a.m.-3:35 p.m.

2 stops13h 20m

C$ 785

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

dom. 21/12

10:45 p.m.-6:34 a.m.

2 stops28h 49m

London

jue. 8/1

8:10 p.m.-12:12 p.m.

1 stop19h 02m

C$ 821

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 15/1

10:15 a.m.-6:34 a.m.

2 stops17h 19m

C$ 218

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

jue. 15/1

1:00 p.m.-6:34 a.m.

1 stop14h 34m

C$ 241

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

mar. 13/1

1:00 p.m.-6:34 a.m.

1 stop14h 34m

C$ 249

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 17 results
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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.

Cheapflights Insights

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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to London, Ontario (average of C$ 178). Flying from San Francisco to London, Ontario in December is currently the most expensive (average of C$ 297). 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 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, Air Canada, and United Airlines can get you from San Francisco to London, Ontario in just under 11h 46m. Your travel time can differ by up to 2h 48m. 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.

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

    Currently, February is the cheapest month in which you can book a flight from San Francisco to London, Ontario (average of C$ 178). Flying from San Francisco to London, Ontario in December is currently the most expensive (average of C$ 297). 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

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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Alternative routes for San Francisco to London

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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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