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Cheap flights from San Francisco to London from $154

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 4/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from San Francisco to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
2:20 pm - 9:55 pm
YXU
-
SFO
10h 35m
2 stops
$288WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$318WestJet
Sat, Jul 11 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
2:20 pm - 9:55 pm
YXU
-
SFO
10h 35m
2 stops
$322WestJet
Sat, Jul 11 - Tue, Jul 14
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 4:40 pm
YXU
-
SFO
13h 30m
1 stop
$324WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:00 am - 2:45 pm
SFO
-
YXU
29h 45m
2 stops
WestJet Logo
2:20 pm - 9:55 pm
YXU
-
SFO
10h 35m
2 stops
$350WestJet
Sat, Jul 11 - Tue, Jul 14
Air Canada Logo
6:00 pm - 5:03 pm
SFO
-
YXU
20h 03m
2 stops
Air Canada Logo
9:25 am - 3:20 pm
YXU
-
SFO
8h 55m
1 stop
$377Air Canada
Sat, Apr 11 - Wed, Apr 15
Air Canada Logo
11:20 am - 8:43 am
SFO
-
YXU
18h 23m
2 stops
Air Canada Logo
5:10 am - 10:55 am
YXU
-
SFO
8h 45m
1 stop
$382Air Canada
Sat, Apr 11 - Wed, Apr 15
Air Canada Logo
1:20 pm - 8:43 am
SFO
-
YXU
16h 23m
2 stops
Air Canada Logo
5:10 am - 12:30 pm
YXU
-
SFO
10h 20m
2 stops
$387Air Canada
Sat, Apr 11 - Wed, Apr 15
Air Canada Logo
4:15 pm - 8:43 am
SFO
-
YXU
13h 28m
1 stop
Air Canada Logo
9:25 am - 9:30 pm
YXU
-
SFO
15h 05m
1 stop
$402Air Canada
Fri, Apr 17 - Mon, Apr 20
WestJet Logo
1:00 pm - 2:45 pm
SFO
-
YXU
46h 45m
2 stops
WestJet Logo
2:20 pm - 9:55 pm
YXU
-
SFO
10h 35m
2 stops
$405WestJet
Fri, Jul 10 - Tue, Jul 14

Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets
Air Canada
Apr 11
SFO4:15 pmSan Francisco
13h 28m
1 stop
YXU8:43 amLondon
Apr 15
YXU9:25 amLondon
8h 55m
1 stop
SFO3:20 pmSan Francisco
$377
Air Canada
Apr 11
SFO11:20 amSan Francisco
18h 23m
2 stops
YXU8:43 amLondon
Apr 15
YXU5:10 amLondon
8h 45m
1 stop
SFO10:55 amSan Francisco
$382
Air Canada
Apr 11
SFO1:20 pmSan Francisco
16h 23m
2 stops
YXU8:43 amLondon
Apr 15
YXU5:10 amLondon
10h 20m
2 stops
SFO12:30 pmSan Francisco
$387

United Airlines flights from San Francisco to London, Ontario

Our best United Airlines deals on San Francisco to London, Ontario flight tickets
United Airlines
Mar 30
SFO6:55 pmSan Francisco
19h 08m
2 stops
YXU5:03 pmLondon
Apr 6
YXU5:40 pmLondon
10h 37m
2 stops
SFO1:17 amSan Francisco
$452
United Airlines
Mar 30
SFO10:42 pmSan Francisco
15h 21m
1 stop
YXU5:03 pmLondon
Apr 6
YXU5:40 pmLondon
10h 37m
2 stops
SFO1:17 amSan Francisco
$468
United Airlines
Mar 30
SFO4:20 pmSan Francisco
13h 23m
1 stop
YXU8:43 amLondon
Apr 6
YXU9:25 amLondon
8h 55m
1 stop
SFO3:20 pmSan Francisco
$599

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to London, Ontario 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, momondo users made 832,500 searches. Data last updated February 16, 2026.
Use the filters below to find and compare flights from San Francisco to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

2:20 pm-9:55 pm

2 stops10h 35m

$288

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 7/11

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

6:10 am-12:00 pm

1 stop8h 50m

$318

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 7/11

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

2:20 pm-9:55 pm

2 stops10h 35m

$322

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

6:10 am-4:40 pm

1 stop13h 30m

$324

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 7/11

6:00 am-2:45 pm

2 stops29h 45m

London

Tue 7/14

2:20 pm-9:55 pm

2 stops10h 35m

$350

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 4/11

6:00 pm-5:03 pm

2 stops20h 03m

London

Wed 4/15

9:25 am-3:20 pm

1 stop8h 55m

$377

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 4/11

11:20 am-8:43 am

2 stops18h 23m

London

Wed 4/15

5:10 am-10:55 am

1 stop8h 45m

$382

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 4/11

1:20 pm-8:43 am

2 stops16h 23m

London

Wed 4/15

5:10 am-12:30 pm

2 stops10h 20m

$387

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 4/17

4:15 pm-8:43 am

1 stop13h 28m

London

Mon 4/20

9:25 am-9:30 pm

1 stop15h 05m

$402

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

1:00 pm-2:45 pm

2 stops46h 45m

London

Tue 7/14

2:20 pm-9:55 pm

2 stops10h 35m

$405

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Francisco to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on San Francisco to London, Ontario flights?

You could potentially save up to 66% on your flight if you consider stops on a San Francisco to London, Ontario flight.

When to book flights from San Francisco to London, Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to London, Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to London, Ontario (SFO to YXU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to London, Ontario

Fastest flight time

8h 15m

Direct flights

None
The fastest flight from San Francisco to London, Ontario takes 8h 15m
There are no direct flights from San Francisco to London, Ontario. There are no popular flight routes from San Francisco to London, Ontario.
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  • How far is San Francisco to London by plane?

    San Francisco and London are 2173.0 mi apart from one another. Typically, this will take 8h 15m by plane in normal conditions.

  • When did momondo last update prices for flights from San Francisco Airport to London Airport?

    Prices for flights from San Francisco Airport to London Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to London Airport?

  • How old do you have to be to fly from San Francisco Airport to London Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to London Airport.

  • What documentation or ID do you need to fly to London Airport?

    The necessary travel and health documents for your London Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Francisco to London, Ontario?

Best airlines flying from San Francisco to London, Ontario

Compare and see reviews for airlines that fly from San Francisco to London, Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $145Free CancellationRating
7.1
10,723 reviews
Search Air Canada flights
WestJetPriceFrom $162Free CancellationRating
7.2
3,266 reviews
Search WestJet flights
United AirlinesPriceFrom $192Free CancellationRating
7.4
9,308 reviews
Search United Airlines flights

Traveling to a place near London?

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

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Francisco to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from San Francisco to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from San Francisco with this policy.

How can momondo help me find flights from San Francisco to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Francisco to London.

I’m not ready to book a flight from San Francisco to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from San Francisco. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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