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Cheap flights from San Francisco to London from $322

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 7/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
2:40 pm - 9:55 pm
YXU
-
SFO
10h 15m
2 stops
$322WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$346WestJet
Tue, May 12 - Sun, May 17
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
5:55 pm - 9:55 pm
YXU
-
SFO
31h 00m
1 stop
$355WestJet
Fri, Jul 10 - Tue, Jul 14
WestJet Logo
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$356WestJet
Tue, Jul 21 - Thu, Jul 23
Air Canada Logo
7:30 pm - 11:45 am
SFO
-
YXU
13h 15m
2 stops
Air Canada Logo
5:40 am - 12:32 pm
YXU
-
SFO
9h 52m
1 stop
$378Air Canada
Mon, Aug 31 - Wed, Sep 2
WestJet Logo
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
2:40 pm - 4:40 pm
YXU
-
SFO
29h 00m
2 stops
$380WestJet
Tue, May 12 - Sun, May 17
Air Canada Logo
7:30 pm - 8:55 am
SFO
-
YXU
10h 25m
2 stops
Air Canada Logo
5:40 am - 3:22 pm
YXU
-
SFO
12h 42m
2 stops
$383Air Canada
Mon, Aug 31 - Wed, Sep 2
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
6:10 am - 9:55 pm
YXU
-
SFO
18h 45m
1 stop
$387WestJet
Tue, Jul 21 - Thu, Jul 23
Multiple Airlines Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
Multiple Airlines Logo
5:55 pm - 8:40 pm
YXU
-
SFO
29h 45m
2 stops
$457Multiple Airlines
Fri, Jul 10 - Mon, Jul 13
WestJet Logo
6:05 pm - 5:20 am
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
2:40 pm - 9:55 pm
YXU
-
SFO
10h 15m
2 stops
$479WestJet
Fri, Jul 10 - Sun, Jul 12

Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets
Air Canada
Aug 31
SFO7:30 pmSan Francisco
13h 15m
2 stops
YXU11:45 amLondon
Sep 2
YXU5:40 amLondon
9h 52m
1 stop
SFO12:32 pmSan Francisco
$378
Air Canada
Aug 31
SFO7:30 pmSan Francisco
10h 25m
2 stops
YXU8:55 amLondon
Sep 2
YXU5:40 amLondon
12h 42m
2 stops
SFO3:22 pmSan Francisco
$383
Air Canada
Jul 21
SFO10:47 pmSan Francisco
7h 33m
1 stop
YXU9:20 amLondon
Jul 23
YXU5:10 amLondon
12h 59m
2 stops
SFO3:09 pmSan Francisco
$507

United Airlines flights from San Francisco to London, Ontario

Our best United Airlines deals on San Francisco to London, Ontario flight tickets
United Airlines
Jul 21
SFO11:59 pmSan Francisco
11h 56m
2 stops
YXU2:55 pmLondon
Jul 23
YXU6:20 pmLondon
10h 37m
2 stops
SFO1:57 amSan Francisco
$516
United Airlines
May 2
SFO10:42 pmSan Francisco
10h 01m
1 stop
YXU11:43 amLondon
May 30
YXU5:10 amLondon
8h 40m
1 stop
SFO10:50 amSan Francisco
$661
United Airlines
May 1
SFO9:08 pmSan Francisco
17h 25m
2 stops
YXU5:33 pmLondon
May 30
YXU5:10 amLondon
8h 40m
1 stop
SFO10:50 amSan Francisco
$671

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 April 25, 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

Cheapest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

2:40 pm-9:55 pm

2 stops10h 15m

$322
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 5/12

6:00 am-4:45 pm

1 stop7h 45m

London

Sun 5/17

6:10 am-12:00 pm

1 stop8h 50m

$346

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Tue 7/14

5:55 pm-9:55 pm

1 stop31h 00m

$355

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 7/21

6:00 am-4:45 pm

1 stop7h 45m

London

Thu 7/23

6:10 am-12:00 pm

1 stop8h 50m

$356

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/31

7:30 pm-11:45 am

2 stops13h 15m

London

Wed 9/2

5:40 am-12:32 pm

1 stop9h 52m

$378

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 5/12

6:00 am-4:45 pm

1 stop7h 45m

London

Sun 5/17

2:40 pm-4:40 pm

2 stops29h 00m

$380

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/31

7:30 pm-8:55 am

2 stops10h 25m

London

Wed 9/2

5:40 am-3:22 pm

2 stops12h 42m

$383

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 7/21

6:05 pm-5:20 am

1 stop8h 15m

London

Thu 7/23

6:10 am-9:55 pm

1 stop18h 45m

$387

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 7/13

5:55 pm-8:40 pm

2 stops29h 45m

$457

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 7/10

6:05 pm-5:20 am

1 stop8h 15m

London

Sun 7/12

2:40 pm-9:55 pm

2 stops10h 15m

$479

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 5% 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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Frequently asked questions about flying from San Francisco to London, Ontario

  • How far is San Francisco to London by plane?

    San Francisco and London are 2172.7 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
WestJetPriceFrom $162Free CancellationRating
7.2
3,325 reviews
Search WestJet 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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