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Cheap flights from London, ON to San Francisco from C$ 262

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 21/10. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to San Francisco

Enter your travel dates to find the best prices.

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 10 June 2026.

Thu 8/106:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Tue 13/106:00 a.m.
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 10/6C$ 491
Fri 24/76:10 a.m.
YXU
-
SFO
1 stop8h 50m
WestJet
Fri 31/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 9/6C$ 501
Thu 8/103:30 p.m.
YXU
-
SFO
2 stops12h 29m
United Airlines
Tue 13/1010:51 p.m.
SFO
-
YXU
1 stop7h 29m
United Airlines
Deal found 9/6C$ 545
Thu 3/125:45 a.m.
YXU
-
SFO
1 stop10h 30m
Air Canada
Sat 5/1210:45 p.m.
SFO
-
YXU
1 stop7h 21m
Air Canada
Deal found 9/6C$ 552
Thu 3/123:25 p.m.
YXU
-
SFO
2 stops12h 04m
United Airlines
Sat 5/1210:50 p.m.
SFO
-
YXU
2 stops13h 16m
United Airlines
Deal found 8/6C$ 561
Tue 21/72:40 p.m.
YXU
-
SFO
2 stops24h 20m
WestJet
Tue 28/76:00 a.m.
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 6/6C$ 590

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 10 June 2026.

Round-trip from

C$ 476

One-way from

C$ 262

Popular in

September

Cheapest in

August

Average price

C$ 827
WestJet
  • WestJet
  • 9/7-29/7
  • 2 total stops
  • 31h 15m total
  • London to San Francisco
Search Deals
WestJet
  • WestJet
  • 21/10
  • 1 total stop
  • 8h 50m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease (C$ 129 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 629,999 searches. Data last updated 10 June 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 24/7

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

1 stop8h 50m

San Francisco

Fri 31/7

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

1 stop7h 45m

C$ 501

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/10

3:30 p.m.-12:59 a.m.

2 stops12h 29m

San Francisco

Tue 13/10

10:51 p.m.-9:20 a.m.

1 stop7h 29m

C$ 545

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/10

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

1 stop8h 50m

San Francisco

Tue 13/10

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

1 stop20h 20m

C$ 558

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 3/12

3:25 p.m.-12:29 a.m.

2 stops12h 04m

San Francisco

Sat 5/12

10:50 p.m.-3:06 p.m.

2 stops13h 16m

C$ 561

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 21/7

2:40 p.m.-12:00 p.m.

2 stops24h 20m

San Francisco

Tue 28/7

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

1 stop7h 45m

C$ 590

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 9/7

10:05 a.m.-10:51 p.m.

2 stops15h 46m

San Francisco

Tue 28/7

12:50 a.m.-2:52 p.m.

2 stops11h 02m

C$ 657

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 8/7

3:30 p.m.-6:53 a.m.

2 stops18h 23m

San Francisco

Mon 13/7

12:45 a.m.-5:42 p.m.

2 stops13h 57m

C$ 657

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 3/12

5:45 a.m.-4:06 p.m.

2 stops13h 21m

San Francisco

Sat 5/12

2:15 p.m.-9:06 a.m.

1 stop15h 51m

C$ 668
Cheapest one-way

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 21/10

5:40 a.m.-8:47 p.m.

2 stops18h 07m

C$ 361

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 9/7

10:05 a.m.-1:15 a.m.

2 stops18h 10m

C$ 363

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

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

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.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 10 June 2026.
Read through reviews of airlines operating flights from London to San Francisco, such as WestJet and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
3,356 reviews
Check prices

Boarding

7.4

Entertainment

6.1

Overall

7.2

Comfort

7.0

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
WestJet
7.2
Good
3,356 reviews
WestJet
7.2
Good
3,356 reviews
Check prices

Boarding

7.4

Entertainment

6.1

Overall

7.2

Comfort

7.0

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
Air Canada
7.1
Good
11,154 reviews
WestJet
7.2
Good
3,356 reviews
Check prices

Boarding

7.4

Entertainment

6.1

Overall

7.2

Comfort

7.0

Crew

7.9

Food

6.2

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

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?

    A quick flight from London, Ontario to San Francisco can take about 8h 50m. WestJet provides one of the quickest options available for as low as C$ 501. The distance between London, Ontario and San Francisco is about 3508 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

    According to our current data, WestJet (C$ 222), and Air Canada (C$ 257) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 69% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Burlingame
San Bruno
Roseville
Livermore
South San Francisco
Novato
Vallejo

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from London to San Francisco

Discover the top 2 airlines that operate flights from London to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 222AverageC$ 426FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 257AverageC$ 846FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 London to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Francisco.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to San Francisco flexibly with Cheapflights today.

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

Of course! You can now track prices for flights from London to San Francisco 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.

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