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Cheap flights from San Francisco to London from C$ 298

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 23/4. 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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Find the cheapest flights from San Francisco to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
8:30 a.m. - 9:18 p.m.
SFO
-
YXU
9h 48m
1 stop
Air Canada Logo
5:10 a.m. - 10:55 a.m.
YXU
-
SFO
8h 45m
1 stop
C$ 640Air Canada
Sat, 11 Apr - Wed, 15 Apr
Air Canada Logo
7:25 a.m. - 9:18 p.m.
SFO
-
YXU
10h 53m
2 stops
Air Canada Logo
9:25 a.m. - 3:20 p.m.
YXU
-
SFO
8h 55m
1 stop
C$ 647Air Canada
Sat, 11 Apr - Wed, 15 Apr
Air Canada Logo
7:25 a.m. - 9:18 p.m.
SFO
-
YXU
10h 53m
2 stops
Air Canada Logo
5:10 a.m. - 3:32 p.m.
YXU
-
SFO
13h 22m
2 stops
C$ 654Air Canada
Sat, 11 Apr - Wed, 15 Apr
Air Canada Logo
4:20 p.m. - 8:46 a.m.
SFO
-
YXU
13h 26m
1 stop
Air Canada Logo
5:10 a.m. - 10:55 a.m.
YXU
-
SFO
8h 45m
1 stop
C$ 673Air Canada
Mon, 23 Mar - Mon, 30 Mar
Multiple Airlines Logo
8:09 p.m. - 6:35 a.m.
SFO
-
YXU
31h 26m
2 stops
Multiple Airlines Logo
8:10 p.m. - 12:10 p.m.
YXU
-
SFO
19h 00m
1 stop
C$ 725Multiple Airlines
Mon, 23 Mar - Mon, 30 Mar
United Airlines Logo
10:45 p.m. - 9:21 p.m.
SFO
-
YXU
19h 36m
2 stops
United Airlines Logo
9:40 a.m. - 6:38 p.m.
YXU
-
SFO
11h 58m
2 stops
C$ 777United Airlines
Mon, 23 Mar - Mon, 30 Mar
United Airlines Logo
6:40 p.m. - 9:21 p.m.
SFO
-
YXU
23h 41m
2 stops
United Airlines Logo
5:10 a.m. - 3:23 p.m.
YXU
-
SFO
13h 13m
2 stops
C$ 960United Airlines
Sat, 21 Mar - Sat, 28 Mar
United Airlines Logo
6:40 p.m. - 9:21 p.m.
SFO
-
YXU
23h 41m
2 stops
United Airlines Logo
5:40 p.m. - 9:23 a.m.
YXU
-
SFO
18h 43m
1 stop
C$ 972United Airlines
Sat, 21 Mar - Sat, 28 Mar
United Airlines Logo
7:10 p.m. - 5:05 p.m.
SFO
-
YXU
18h 55m
3 stops
United Airlines Logo
5:10 a.m. - 3:23 p.m.
YXU
-
SFO
13h 13m
2 stops
C$ 1,142United Airlines
Sat, 21 Mar - Sat, 28 Mar
Air Canada Logo
8:30 a.m. - 9:21 p.m.
SFO
-
YXU
9h 51m
1 stop
Air Canada Logo
5:40 p.m. - 9:23 a.m.
YXU
-
SFO
18h 43m
1 stop
C$ 1,151Air Canada
Sat, 21 Mar - Sat, 28 Mar

Air Canada flights from San Francisco to London, Ontario

Our best Air Canada deals on San Francisco to London, Ontario flight tickets
Air Canada
11 Apr
SFO8:30 a.m.San Francisco
9h 48m
1 stop
YXU9:18 p.m.London
15 Apr
YXU5:10 a.m.London
8h 45m
1 stop
SFO10:55 a.m.San Francisco
C$ 640
Air Canada
11 Apr
SFO7:25 a.m.San Francisco
10h 53m
2 stops
YXU9:18 p.m.London
15 Apr
YXU9:25 a.m.London
8h 55m
1 stop
SFO3:20 p.m.San Francisco
C$ 647
Air Canada
11 Apr
SFO7:25 a.m.San Francisco
10h 53m
2 stops
YXU9:18 p.m.London
15 Apr
YXU5:10 a.m.London
13h 22m
2 stops
SFO3:32 p.m.San Francisco
C$ 654

United Airlines flights from San Francisco to London, Ontario

Our best United Airlines deals on San Francisco to London, Ontario flight tickets
United Airlines
23 Mar
SFO10:45 p.m.San Francisco
19h 36m
2 stops
YXU9:21 p.m.London
30 Mar
YXU9:40 a.m.London
11h 58m
2 stops
SFO6:38 p.m.San Francisco
C$ 777
United Airlines
21 Mar
SFO6:40 p.m.San Francisco
23h 41m
2 stops
YXU9:21 p.m.London
28 Mar
YXU5:10 a.m.London
13h 13m
2 stops
SFO3:23 p.m.San Francisco
C$ 960
United Airlines
21 Mar
SFO6:40 p.m.San Francisco
23h 41m
2 stops
YXU9:21 p.m.London
28 Mar
YXU5:40 p.m.London
18h 43m
1 stop
SFO9:23 a.m.San Francisco
C$ 972

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 96,600 searches. Data last updated 7 February 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

Sat 11/4

8:30 a.m.-9:18 p.m.

1 stop9h 48m

London

Wed 15/4

5:10 a.m.-10:55 a.m.

1 stop8h 45m

C$ 640

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 11/4

7:25 a.m.-9:18 p.m.

2 stops10h 53m

London

Wed 15/4

9:25 a.m.-3:20 p.m.

1 stop8h 55m

C$ 647

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 11/4

7:25 a.m.-9:18 p.m.

2 stops10h 53m

London

Wed 15/4

5:10 a.m.-3:32 p.m.

2 stops13h 22m

C$ 654

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

4:20 p.m.-8:46 a.m.

1 stop13h 26m

London

Mon 30/3

5:10 a.m.-10:55 a.m.

1 stop8h 45m

C$ 673

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

8:09 p.m.-6:35 a.m.

2 stops31h 26m

London

Mon 30/3

8:10 p.m.-12:10 p.m.

1 stop19h 00m

C$ 725

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 23/3

10:45 p.m.-9:21 p.m.

2 stops19h 36m

London

Mon 30/3

9:40 a.m.-6:38 p.m.

2 stops11h 58m

C$ 777

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 21/3

6:40 p.m.-9:21 p.m.

2 stops23h 41m

London

Sat 28/3

5:10 a.m.-3:23 p.m.

2 stops13h 13m

C$ 960

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 21/3

6:40 p.m.-9:21 p.m.

2 stops23h 41m

London

Sat 28/3

5:40 p.m.-9:23 a.m.

1 stop18h 43m

C$ 972

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 21/3

7:10 p.m.-5:05 p.m.

3 stops18h 55m

London

Sat 28/3

5:10 a.m.-3:23 p.m.

2 stops13h 13m

C$ 1,142

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sat 21/3

8:30 a.m.-9:21 p.m.

1 stop9h 51m

London

Sat 28/3

5:40 p.m.-9:23 a.m.

1 stop18h 43m

C$ 1,151

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

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

Air Canada is the most popular carrier operating from San Francisco to London

Which airlines fly to London, Ontario?

Porter Airlines, Air Canada and Air Transat are the top three most popular airlines that fly to London, Ontario from San Francisco according to our data. Porter Airlines is the first choice among our users, with 46% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 6 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

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

10h 30m

Direct flights

None
The fastest flight from San Francisco to London, Ontario takes 10h 30m
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

  • How far is San Francisco to London by plane?

    There are 3497.0 km between San Francisco and London. 10h 30m is a normal flight duration for this route.

  • 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 are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to London Airport.

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

    The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling 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?

Finding the right flight to London from San Francisco is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for San Francisco to London flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to London from San Francisco. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from San Francisco and alert you when they change.

An easier way to manage your London, Ontario trip

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