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Cheap flights from London, Ontario to San Francisco from C$ 275

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to San Francisco departing on 20/5. 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

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Find the cheapest flights from London, Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
C$ 441WestJet
Wed, 20 May - Mon, 25 May
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
C$ 448WestJet
Thu, 21 May - Mon, 25 May
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 5:20 a.m.
SFO
-
YXU
20h 20m
1 stop
C$ 484WestJet
Sun, 10 May - Sat, 16 May
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
C$ 491WestJet
Thu, 2 Jul - Mon, 6 Jul
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 4:45 p.m.
SFO
-
YXU
7h 45m
1 stop
C$ 497WestJet
Thu, 9 Jul - Wed, 29 Jul
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
C$ 506WestJet
Thu, 4 Jun - Mon, 8 Jun
WestJet Logo
6:10 a.m. - 9:55 p.m.
YXU
-
SFO
18h 45m
1 stop
WestJet Logo
6:00 a.m. - 1:50 p.m.
SFO
-
YXU
28h 50m
2 stops
C$ 522WestJet
Sun, 10 May - Sat, 16 May
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
6:00 a.m. - 1:50 p.m.
SFO
-
YXU
28h 50m
2 stops
C$ 529WestJet
Thu, 2 Jul - Mon, 6 Jul
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
WestJet Logo
1:00 p.m. - 5:20 a.m.
SFO
-
YXU
13h 20m
1 stop
C$ 563WestJet
Wed, 29 Apr - Sat, 2 May
WestJet Logo
2:40 p.m. - 9:55 p.m.
YXU
-
SFO
10h 15m
2 stops
WestJet Logo
6:05 p.m. - 1:50 p.m.
SFO
-
YXU
40h 45m
2 stops
C$ 567WestJet
Fri, 22 May - Fri, 29 May

WestJet flights from London, Ontario to San Francisco

Our best WestJet deals on London, Ontario to San Francisco flight tickets
WestJet
20 May
YXU6:10 a.m.London
8h 50m
1 stop
SFO12:00 p.m.San Francisco
25 May
SFO6:05 p.m.San Francisco
8h 15m
1 stop
YXU5:20 a.m.London
C$ 441
WestJet
21 May
YXU6:10 a.m.London
8h 50m
1 stop
SFO12:00 p.m.San Francisco
25 May
SFO6:05 p.m.San Francisco
8h 15m
1 stop
YXU5:20 a.m.London
C$ 448
WestJet
2 Jul
YXU6:10 a.m.London
8h 50m
1 stop
SFO12:00 p.m.San Francisco
6 Jul
SFO6:05 p.m.San Francisco
8h 15m
1 stop
YXU5:20 a.m.London
C$ 491

United Airlines flights from London, Ontario to San Francisco

Our best United Airlines deals on London, Ontario to San Francisco flight tickets
United Airlines
29 Apr
YXU5:10 a.m.London
21h 49m
2 stops
SFO11:59 p.m.San Francisco
2 May
SFO11:56 p.m.San Francisco
18h 42m
2 stops
YXU9:38 p.m.London
C$ 582
United Airlines
22 May
YXU5:10 a.m.London
8h 40m
1 stop
SFO10:50 a.m.San Francisco
29 May
SFO4:40 p.m.San Francisco
21h 53m
2 stops
YXU5:33 p.m.London
C$ 598
United Airlines
29 Apr
YXU5:10 a.m.London
20h 45m
2 stops
SFO10:55 p.m.San Francisco
2 May
SFO11:56 p.m.San Francisco
18h 42m
2 stops
YXU9:38 p.m.London
C$ 605

momondo Fare Finder

 
Customize your flight search to find flights from London, Ontario to San Francisco 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 10 April 2026.
Use the filters below to find and compare flights from London, Ontario to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 20/5

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Mon 25/5

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 441

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 21/5

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Mon 25/5

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 448

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 10/5

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Sat 16/5

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 484

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 2/7

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Mon 6/7

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 491
Quickest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 9/7

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Wed 29/7

6:00 a.m.-4:45 p.m.

1 stop7h 45m

C$ 497

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 4/6

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Mon 8/6

6:05 p.m.-5:20 a.m.

1 stop8h 15m

C$ 506

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sun 10/5

6:10 a.m.-9:55 p.m.

1 stop18h 45m

San Francisco

Sat 16/5

6:00 a.m.-1:50 p.m.

2 stops28h 50m

C$ 522

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 2/7

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Mon 6/7

6:00 a.m.-1:50 p.m.

2 stops28h 50m

C$ 528

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 29/4

6:10 a.m.-12:00 p.m.

1 stop8h 50m

San Francisco

Sat 2/5

1:00 p.m.-5:20 a.m.

1 stop13h 20m

C$ 563

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 22/5

2:40 p.m.-9:55 p.m.

2 stops10h 15m

San Francisco

Fri 29/5

6:05 p.m.-1:50 p.m.

2 stops40h 45m

C$ 567

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 San Francisco from

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

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 typical price of a round-trip flight between London, Ontario and San Francisco?

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

You could potentially save up to 55% on your flight if you consider stops on a London, Ontario to San Francisco flight.

When to book flights from London, Ontario to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from London, Ontario to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

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

Find info about flight duration, direct flights, and airports for your flight from London, Ontario to San Francisco

Fastest flight time

8h 40m

Direct flights

None
The fastest flight from London, Ontario to San Francisco takes 8h 40m
There are no direct flights from London, Ontario to San Francisco. There are no popular flight routes from London, Ontario to San Francisco.
Search flight deals

Frequently asked questions about flying from London, Ontario to San Francisco

  • How far is London to San Francisco by plane?

    San Francisco is 3496.6 km away from London. In terms of flight time, this usually takes a little over 8h 40m.

  • When did momondo last update prices for flights from London Airport to San Francisco Airport?

    Prices for flights from London Airport to San Francisco Airport were last updated today.

  • How many operators does momondo search for flights from London Airport to San Francisco Airport?

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to San Francisco Airport.

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

    The necessary travel and health documents for your San Francisco 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 London, Ontario to San Francisco?

Best airlines flying from London, Ontario to San Francisco

Compare and see reviews for airlines that fly from London, Ontario to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 220Free CancellationRating
7.2
3,320 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 255Free CancellationRating
7.1
10,915 reviews
Search Air Canada flights

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
San Mateo
Belmont
Santa Cruz
Palo Alto
San Bruno
Newark
Milpitas
Carmel-by-the-Sea
Turlock
South San Francisco
Mountain View
Burlingame
Pacific Grove
Fremont
Santa Clara
Cupertino
Pacifica
Woodland
Los Banos
Roseville

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

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

Yes. All flights to San Francisco from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

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

Price alerts on flights to San Francisco from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Francisco trip

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