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$127+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SFO
May 29 — Jun 51
Fri 5/29
Fri 6/5
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 April 29, 2026.

This oojo deal was found by Cheapflights users on 4/29. 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.
Thu 10/86:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Tue 10/136:00 am
SFO
-
YXU
1 stop20h 20m
WestJet
Deal found 4/29$239
This oojo deal was found by Cheapflights users on 4/28. 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.
Tue 5/262:40 pm
YXU
-
SFO
2 stops10h 15m
WestJet
Sat 8/16:05 pm
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 4/28$268
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Tue 5/266:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Sun 8/26:00 am
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 4/27$285
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
Tue 5/262:40 pm
YXU
-
SFO
2 stops10h 15m
WestJet
Tue 8/46:05 pm
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 4/27$289
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Tue 5/262:40 pm
YXU
-
SFO
2 stops10h 15m
WestJet
Thu 7/306:05 pm
SFO
-
YXU
1 stop8h 15m
WestJet
Deal found 4/28$290
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Tue 5/266:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Mon 8/36:00 am
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 4/28$291
This WestJet deal was found by Cheapflights users on 4/24. 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.
Thu 7/96:10 am
YXU
-
SFO
1 stop8h 50m
WestJet
Mon 7/136:00 am
SFO
-
YXU
1 stop7h 45m
WestJet
Deal found 4/24$304

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 April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$239
(oojo)

One-way from

$189
(WestJet)

Popular in

March

Cheapest in

August

Average price

$344
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. 28% potential increase in price ($164 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 29, 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

Tue 5/26

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Mon 8/3

6:00 am-4:45 pm

1 stop7h 45m

$291

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 7/9

6:10 am-12:00 pm

1 stop8h 50m

San Francisco

Mon 7/13

6:00 am-4:45 pm

1 stop7h 45m

$304

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/27

5:40 am-12:32 pm

1 stop9h 52m

San Francisco

Mon 8/31

11:59 pm-2:55 pm

2 stops11h 56m

$406

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 7/9

6:20 pm-1:57 am

2 stops10h 37m

San Francisco

Mon 7/13

11:30 pm-2:55 pm

2 stops12h 25m

$412

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 6/8

3:30 pm-1:15 am

2 stops12h 45m

San Francisco

Mon 6/15

11:30 pm-2:58 pm

2 stops12h 28m

$440

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 6/13

6:10 pm-9:09 am

1 stop17h 59m

San Francisco

Sat 6/27

9:00 pm-9:37 pm

2 stops21h 37m

$495

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 5/26

12:20 pm-7:24 pm

2 stops10h 04m

San Francisco

Tue 8/4

5:05 am-9:40 pm

2 stops13h 35m

$522

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 5/26

12:20 pm-9:18 pm

2 stops11h 58m

San Francisco

Mon 8/3

11:05 pm-2:55 pm

2 stops12h 50m

$522
Cheapest one-way

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 10/21

6:10 am-12:00 pm

1 stop8h 50m

$127

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 10/20

5:40 am-3:21 pm

2 stops12h 41m

$156

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 20 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

How much does it cost to fly round-trip from London, Ontario to San Francisco?

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 1h 02m. 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.

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 Cruz
Santa Clara
Fairfield
Rancho Cordova
San Bruno
Watsonville
San Ramon
Emeryville
Vacaville
Roseville
San Carlos
Redwood City
Sunnyvale
Turlock
San Lorenzo
Davis
Manteca
Union City
Elk Grove

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