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Cheap flights from San Francisco to London from $209

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 7/21. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
$341WestJet
Sun, Aug 2 - Sat, Aug 8
WestJet Logo
1:00 pm - 5:20 am
SFO
-
YXU
13h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$354WestJet
Sat, Aug 8 - Mon, Aug 17
WestJet Logo
1:00 pm - 5:20 am
SFO
-
YXU
13h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$361WestJet
Fri, Aug 7 - Fri, Aug 14
WestJet Logo
6:00 am - 1:50 pm
SFO
-
YXU
28h 50m
2 stops
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$368WestJet
Mon, Aug 17 - Wed, Aug 26
WestJet Logo
6:00 am - 1:50 pm
SFO
-
YXU
28h 50m
2 stops
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$371WestJet
Sat, Aug 8 - Mon, Aug 17
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
$374WestJet
Tue, Aug 18 - Fri, Aug 21
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
$380WestJet
Tue, Aug 18 - Fri, Aug 21
WestJet Logo
6:00 am - 5:20 am
SFO
-
YXU
20h 20m
1 stop
WestJet Logo
6:10 am - 12:00 pm
YXU
-
SFO
8h 50m
1 stop
$385WestJet
Tue, Sep 15 - Sat, Sep 19
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
$390WestJet
Mon, Sep 21 - Thu, Sep 24
Air Canada Logo
8:10 am - 9:20 am
SFO
-
YXU
22h 10m
2 stops
Air Canada Logo
10:05 am - 8:51 pm
YXU
-
SFO
13h 46m
2 stops
$403Air Canada
Tue, Aug 18 - Fri, Aug 21

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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
Aug 18
SFO8:10 amSan Francisco
22h 10m
2 stops
YXU9:20 amLondon
Aug 21
YXU10:05 amLondon
13h 46m
2 stops
SFO8:51 pmSan Francisco
$403
Air Canada
Sep 21
SFO7:30 pmSan Francisco
19h 13m
2 stops
YXU5:43 pmLondon
Sep 24
YXU3:30 pmLondon
8h 29m
1 stop
SFO8:59 pmSan Francisco
$466
Air Canada
Sep 21
SFO7:30 pmSan Francisco
19h 13m
2 stops
YXU5:43 pmLondon
Sep 24
YXU3:30 pmLondon
8h 29m
1 stop
SFO8:59 pmSan Francisco
$477

WestJet flights from San Francisco to London, Ontario

Our best WestJet deals on San Francisco to London, Ontario flight tickets
WestJet
Aug 2
SFO6:00 amSan Francisco
7h 45m
1 stop
YXU4:45 pmLondon
Aug 8
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$341
WestJet
Aug 8
SFO1:00 pmSan Francisco
13h 20m
1 stop
YXU5:20 amLondon
Aug 17
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$354
WestJet
Aug 7
SFO1:00 pmSan Francisco
13h 20m
1 stop
YXU5:20 amLondon
Aug 14
YXU6:10 amLondon
8h 50m
1 stop
SFO12:00 pmSan Francisco
$361

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 June 26, 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

Sun 8/2

6:00 am-4:45 pm

1 stop7h 45m

London

Sat 8/8

6:10 am-12:00 pm

1 stop8h 50m

$341

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 8/8

1:00 pm-5:20 am

1 stop13h 20m

London

Mon 8/17

6:10 am-12:00 pm

1 stop8h 50m

$354

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 8/7

1:00 pm-5:20 am

1 stop13h 20m

London

Fri 8/14

6:10 am-12:00 pm

1 stop8h 50m

$361

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/17

6:00 am-1:50 pm

2 stops28h 50m

London

Wed 8/26

6:10 am-12:00 pm

1 stop8h 50m

$368

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 8/8

6:00 am-1:50 pm

2 stops28h 50m

London

Mon 8/17

6:10 am-12:00 pm

1 stop8h 50m

$371

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 8/18

6:05 pm-5:20 am

1 stop8h 15m

London

Fri 8/21

6:10 am-12:00 pm

1 stop8h 50m

$374

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 8/18

6:05 pm-5:20 am

1 stop8h 15m

London

Fri 8/21

2:40 pm-9:55 pm

2 stops10h 15m

$380

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 9/15

6:00 am-5:20 am

1 stop20h 20m

London

Sat 9/19

6:10 am-12:00 pm

1 stop8h 50m

$385

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 9/21

6:00 am-4:45 pm

1 stop7h 45m

London

Thu 9/24

6:10 am-12:00 pm

1 stop8h 50m

$390

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Tue 8/18

8:10 am-9:20 am

2 stops22h 10m

London

Fri 8/21

10:05 am-8:51 pm

2 stops13h 46m

$403

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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

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.
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 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
3,384 reviews
Search WestJet flights
Air CanadaPriceFrom $210Free CancellationRating
7.1
11,254 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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