What is the cheapest airline that flies from San Francisco to London?

Air Canada and WestJet are the most popular carriers operating from San Francisco to London

What airlines fly to London, Ontario?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to London, Ontario from San Francisco according to our data. Air Canada is the first choice among our users, with 38% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 8 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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?

As of August 2026, there are 2 operators available to choose from 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.

$188 Cheap Flights from San Francisco to London, Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:05 am - 5:43 pmSFO San Francisco-YXU London

14h 38m1 stop Toronto Pearson Intl

3:30 pm - 8:59 pmYXU London-SFO San Francisco

8h 29m1 stop Toronto Pearson Intl

$382Air Canada

Wed, Sep 16 - Thu, Sep 24

4:40 pm - 5:35 amSFO San Francisco-YXU London

9h 55m1 stop Calgary

6:40 am - 3:50 pmYXU London-SFO San Francisco

12h 10m1 stop Calgary

$382WestJet

Fri, Nov 6 - Mon, Nov 9

6:00 am - 5:20 amSFO San Francisco-YXU London

20h 20m1 stop Calgary

5:55 pm - 12:00 pmYXU London-SFO San Francisco

21h 05m1 stop Calgary

$388WestJet

Fri, Sep 25 - Mon, Sep 28

6:00 am - 4:45 pmSFO San Francisco-YXU London

7h 45m1 stop Calgary

6:10 am - 12:00 pmYXU London-SFO San Francisco

8h 50m1 stop Calgary

$398WestJet

Fri, Oct 9 - Fri, Oct 16

6:00 am - 5:20 amSFO San Francisco-YXU London

20h 20m1 stop Calgary

6:10 am - 3:46 pmYXU London-SFO San Francisco

12h 36m2 stops Calgary Phoenix Sky Harbor Intl

$447Multiple Airlines

Fri, Sep 25 - Mon, Sep 28

12:05 am - 5:43 pmSFO San Francisco-YXU London

14h 38m1 stop Toronto Pearson Intl

5:40 am - 6:31 pmYXU London-SFO San Francisco

15h 51m2 stops Toronto Pearson Intl Vancouver Intl

$452Air Canada

Wed, Sep 16 - Thu, Sep 24

11:35 am - 9:40 pmSFO San Francisco-YXU London

7h 05m1 stop Toronto Pearson Intl

5:40 am - 10:44 amYXU London-SFO San Francisco

8h 04m1 stop Toronto Pearson Intl

$456Air Canada

Tue, Oct 20 - Thu, Oct 22

7:30 pm - 2:50 pmSFO San Francisco-YXU London

16h 20m2 stops Vancouver Intl Toronto Pearson Intl

5:40 am - 10:44 amYXU London-SFO San Francisco

8h 04m1 stop Toronto Pearson Intl

$460Air Canada

Tue, Sep 29 - Sat, Oct 3

1:02 pm - 5:20 amSFO San Francisco-YXU London

13h 18m2 stops Phoenix Sky Harbor Intl Calgary

6:10 am - 12:00 pmYXU London-SFO San Francisco

8h 50m1 stop Calgary

$500Multiple Airlines

Fri, Oct 9 - Fri, Oct 16

6:00 am - 5:20 amSFO San Francisco-YXU London

20h 20m1 stop Calgary

6:10 am - 9:27 pmYXU London-SFO San Francisco

18h 17m3 stops Calgary Phoenix Sky Harbor Intl Los Angeles

$511Multiple Airlines

Fri, Sep 25 - Mon, Sep 28

Cheap last minute flights

Enter your travel dates to find the best prices.

10:59 pm - 5:20 amSFO San Francisco-YXU London

27h 21m2 stops Detroit Metropolitan Wayne County Calgary

5:55 pm - 9:55 pmYXU London-SFO San Francisco

31h 00m1 stop Calgary

$1,039WestJet

Fri, Aug 28 - Mon, Aug 31

5:36 am - 5:20 amSFO San Francisco-YXU London

20h 44m2 stops Detroit Metropolitan Wayne County Calgary

5:55 pm - 12:00 pmYXU London-SFO San Francisco

21h 05m1 stop Calgary

$1,080WestJet

Thu, Aug 27 - Mon, Aug 31

10:59 pm - 5:20 amSFO San Francisco-YXU London

27h 21m2 stops Detroit Metropolitan Wayne County Calgary

5:55 pm - 9:55 pmYXU London-SFO San Francisco

31h 00m1 stop Calgary

$1,080WestJet

Fri, Aug 28 - Mon, Aug 31

6:05 pm - 5:20 amSFO San Francisco-YXU London

8h 15m1 stop Calgary

6:10 am - 9:55 pmYXU London-SFO San Francisco

18h 45m1 stop Calgary

$1,089WestJet

Thu, Aug 27 - Mon, Aug 31

6:00 am - 4:45 pmSFO San Francisco-YXU London

7h 45m1 stop Calgary

6:10 am - 9:55 pmYXU London-SFO San Francisco

18h 45m1 stop Calgary

$1,090WestJet

Fri, Aug 28 - Mon, Aug 31

6:05 pm - 5:20 amSFO San Francisco-YXU London

8h 15m1 stop Calgary

6:10 am - 9:55 pmYXU London-SFO San Francisco

18h 45m1 stop Calgary

$1,090WestJet

Thu, Aug 27 - Mon, Aug 31

6:20 am - 5:20 amSFO San Francisco-YXU London

20h 00m2 stops Seattle/Tacoma Intl Calgary

5:55 pm - 4:40 pmYXU London-SFO San Francisco

25h 45m1 stop Calgary

$1,101WestJet

Thu, Aug 27 - Mon, Aug 31

10:59 pm - 5:20 amSFO San Francisco-YXU London

27h 21m2 stops Detroit Metropolitan Wayne County Calgary

5:55 pm - 9:55 pmYXU London-SFO San Francisco

31h 00m1 stop Calgary

$1,101WestJet

Fri, Aug 28 - Mon, Aug 31

5:00 am - 5:42 pmSFO San Francisco-YXU London

9h 42m2 stops Denver Intl Toronto Pearson Intl

3:30 pm - 10:55 pmYXU London-SFO San Francisco

10h 25m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$1,505Air Canada

Fri, Aug 28 - Mon, Aug 31

8:39 am - 9:40 pmSFO San Francisco-YXU London

10h 01m2 stops Calgary Toronto Pearson Intl

5:40 am - 1:11 pmYXU London-SFO San Francisco

10h 31m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$1,611Air Canada

Fri, Aug 28 - Mon, Aug 31

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Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets

Air Canada

Sep 16

SFO12:05 amSan Francisco

14h 38m

1 stop

YXU5:43 pmLondon

Sep 24

YXU3:30 pmLondon

8h 29m

1 stop

SFO8:59 pmSan Francisco

$382

Air Canada

Sep 16

SFO12:05 amSan Francisco

14h 38m

1 stop

YXU5:43 pmLondon

Sep 24

YXU5:40 amLondon

15h 51m

2 stops

SFO6:31 pmSan Francisco

$452

Air Canada

Oct 20

SFO11:35 amSan Francisco

7h 05m

1 stop

YXU9:40 pmLondon

Oct 22

YXU5:40 amLondon

8h 04m

1 stop

SFO10:44 amSan Francisco

$456

WestJet flights from San Francisco to London, Ontario

Our best WestJet deals on San Francisco to London, Ontario flight tickets

WestJet

Sep 25

SFO6:00 amSan Francisco

20h 20m

1 stop

YXU5:20 amLondon

Sep 28

YXU5:55 pmLondon

21h 05m

1 stop

SFO12:00 pmSan Francisco

$388

WestJet

Oct 9

SFO6:00 amSan Francisco

7h 45m

1 stop

YXU4:45 pmLondon

Oct 16

YXU6:10 amLondon

8h 50m

1 stop

SFO12:00 pmSan Francisco

$398

WestJet

Nov 6

SFO4:40 pmSan Francisco

9h 55m

1 stop

YXU5:35 amLondon

Nov 9

YXU6:40 amLondon

12h 10m

1 stop

SFO3:50 pmSan Francisco

$406

momondo Fare Finder

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 San Francisco - YXU London

SFOYXU

San Francisco

Wed 9/16

12:05 am-5:43 pm

1 stop14h 38m

London

Thu 9/24

3:30 pm-8:59 pm

1 stop8h 29m

$382

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 11/6

4:40 pm-5:35 am

1 stop9h 55m

London

Mon 11/9

6:40 am-3:50 pm

1 stop12h 10m

$382

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 9/25

6:00 am-5:20 am

1 stop20h 20m

London

Mon 9/28

5:55 pm-12:00 pm

1 stop21h 05m

$388

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 10/9

6:00 am-4:45 pm

1 stop7h 45m

London

Fri 10/16

6:10 am-12:00 pm

1 stop8h 50m

$398

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 9/25

6:00 am-5:20 am

1 stop20h 20m

London

Mon 9/28

6:10 am-3:46 pm

2 stops12h 36m

$447

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Wed 9/16

12:05 am-5:43 pm

1 stop14h 38m

London

Thu 9/24

5:40 am-6:31 pm

2 stops15h 51m

$452

Quickest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 10/20

11:35 am-9:40 pm

1 stop7h 05m

London

Thu 10/22

5:40 am-10:44 am

1 stop8h 04m

$456

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 9/29

7:30 pm-2:50 pm

2 stops16h 20m

London

Sat 10/3

5:40 am-10:44 am

1 stop8h 04m

$460

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 10/9

1:02 pm-5:20 am

2 stops13h 18m

London

Fri 10/16

6:10 am-12:00 pm

1 stop8h 50m

$500

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 9/25

6:00 am-5:20 am

1 stop20h 20m

London

Mon 9/28

6:10 am-9:27 pm

3 stops18h 17m

$511

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

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

Prices

Airlines

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

You could potentially save up to 4% 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

Best Price Found	$188
Fastest flight time	7h 29m
Direct flights	None

The best one-way flight to London, Ontario from San Francisco in the past 72 hours is $188. The best round-trip flight deal from San Francisco to London, Ontario found on momondo in the last 72 hours is $382.

The fastest flight from San Francisco to London, Ontario takes 7h 29m

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 29m 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?
As of August 2026, there are 2 operators available to choose from 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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Francisco to London, Ontario is WestJet (78% of total bookings). The next most popular airline is Air Canada (22%).

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 Canada	PriceFrom $358	Free Cancellation	Rating 7.1 11,540 reviews		Search Air Canada flights
WestJet	PriceFrom $366	Free Cancellation	Rating 7.2 3,437 reviews		Search WestJet flights

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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.

An easier way to manage your London, Ontario trip

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Cheap flights from San Francisco to London from $188

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 10/10. 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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Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets

WestJet flights from San Francisco to London, Ontario

Our best WestJet deals on San Francisco to London, Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from San Francisco to London, Ontario that are best for you.

See travel insights to London from

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

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

What is the cheapest airline that flies from San Francisco to London?

What airlines fly to London, Ontario?

When to book flights from San Francisco to London, Ontario

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London, Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Airports servicing Ontario

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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