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Cheap flights from San Francisco to London from $207

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 10/12. 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
6:00 am - 4:45 pm
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$416WestJet
Thu, Oct 8 - Tue, Oct 13
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
$421WestJet
Mon, Oct 12 - Wed, Oct 21
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
$484WestJet
Wed, Aug 26 - Wed, Sep 23
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
$494WestJet
Mon, Oct 12 - Wed, Oct 14
Air Canada Logo
7:35 pm - 5:45 pm
SFO
-
YXU
19h 10m
2 stops
Air Canada Logo
5:40 am - 10:39 am
YXU
-
SFO
7h 59m
1 stop
$537Air Canada
Fri, Oct 9 - Tue, Oct 13
Air Canada Logo
11:10 am - 9:20 am
SFO
-
YXU
19h 10m
2 stops
Air Canada Logo
5:40 am - 10:39 am
YXU
-
SFO
7h 59m
1 stop
$545Air Canada
Thu, Oct 8 - Tue, Oct 13
Air Canada Logo
11:10 am - 9:20 am
SFO
-
YXU
19h 10m
2 stops
Air Canada Logo
5:40 am - 10:39 am
YXU
-
SFO
7h 59m
1 stop
$548Air Canada
Thu, Oct 8 - Tue, Oct 13
Air Canada Logo
11:10 am - 9:20 am
SFO
-
YXU
19h 10m
2 stops
Air Canada Logo
3:30 pm - 10:20 am
YXU
-
SFO
21h 50m
2 stops
$564Air Canada
Fri, Oct 9 - Tue, Oct 13
Air Canada Logo
11:10 am - 9:20 am
SFO
-
YXU
19h 10m
2 stops
Air Canada Logo
6:20 pm - 10:20 am
YXU
-
SFO
19h 00m
2 stops
$567Air Canada
Thu, Oct 8 - Tue, Oct 13
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
$572WestJet
Wed, Aug 19 - Mon, Aug 24

WestJet flights from San Francisco to London, Ontario

Our best WestJet deals on San Francisco to London, Ontario flight tickets
WestJet
Oct 8
SFO6:00 amSan Francisco
7h 45m
1 stop
YXU4:45 pmLondon
Oct 13
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$416
WestJet
Oct 12
SFO6:00 amSan Francisco
7h 45m
1 stop
YXU4:45 pmLondon
Oct 21
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$421
WestJet
Aug 26
SFO6:05 pmSan Francisco
8h 15m
1 stop
YXU5:20 amLondon
Sep 23
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$484

United Airlines flights from San Francisco to London, Ontario

Our best United Airlines deals on San Francisco to London, Ontario flight tickets
United Airlines
Jun 11
SFO10:35 pmSan Francisco
13h 23m
2 stops
YXU2:58 pmLondon
Jun 17
YXU3:30 pmLondon
8h 40m
1 stop
SFO9:10 pmSan Francisco
$638
United Airlines
Jun 11
SFO10:35 pmSan Francisco
13h 23m
2 stops
YXU2:58 pmLondon
Jun 17
YXU5:10 amLondon
11h 05m
2 stops
SFO1:15 pmSan Francisco
$653
United Airlines
Jun 11
SFO10:35 pmSan Francisco
13h 23m
2 stops
YXU2:58 pmLondon
Jun 20
YXU10:05 amLondon
12h 50m
1 stop
SFO7:55 pmSan Francisco
$663

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 May 29, 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
Quickest round-trip

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 10/8

6:00 am-4:45 pm

1 stop7h 45m

London

Tue 10/13

6:10 am-12:00 pm

1 stop8h 50m

$416

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 10/12

6:00 am-4:45 pm

1 stop7h 45m

London

Wed 10/21

6:10 am-12:00 pm

1 stop8h 50m

$421

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 8/26

6:05 pm-5:20 am

1 stop8h 15m

London

Wed 9/23

6:10 am-12:00 pm

1 stop8h 50m

$484

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 10/12

6:00 am-4:45 pm

1 stop7h 45m

London

Wed 10/14

6:10 am-12:00 pm

1 stop8h 50m

$494

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/9

7:35 pm-5:45 pm

2 stops19h 10m

London

Tue 10/13

5:40 am-10:39 am

1 stop7h 59m

$537

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 10/8

11:10 am-9:20 am

2 stops19h 10m

London

Tue 10/13

5:40 am-10:39 am

1 stop7h 59m

$545

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 10/8

11:10 am-9:20 am

2 stops19h 10m

London

Tue 10/13

5:40 am-10:39 am

1 stop7h 59m

$548

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/9

11:10 am-9:20 am

2 stops19h 10m

London

Tue 10/13

3:30 pm-10:20 am

2 stops21h 50m

$564

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 10/8

11:10 am-9:20 am

2 stops19h 10m

London

Tue 10/13

6:20 pm-10:20 am

2 stops19h 00m

$567

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 8/19

6:05 pm-5:20 am

1 stop8h 15m

London

Mon 8/24

6:10 am-12:00 pm

1 stop8h 50m

$572

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 50% 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

7h 33m

Direct flights

None
The fastest flight from San Francisco to London, Ontario takes 7h 33m
There are no direct flights from San Francisco to London, Ontario. There are no popular flight routes from San Francisco to London, Ontario.
Search flight deals

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 7h 33m 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
3,349 reviews
Search WestJet flights
Air CanadaPriceFrom $210Free CancellationRating
7.1
11,096 reviews
Search Air Canada 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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