What’s the top layover airport for flights from London, Ontario to San Francisco?

Toronto (YYZ) – chosen by Cheapflights users on 56% of one-stop itineraries from London, Ontario to San Francisco on Cheapflights.

What’s the cheapest layover airport for flights from London, Ontario to San Francisco?

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 437.

What’s the fastest layover option from London, Ontario to San Francisco?

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 16m.

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 48m.

How long is the flight from London, Ontario to San Francisco?

A quick flight from London, Ontario to San Francisco can take about 8h 13m. Air Canada provides one of the quickest options available for as low as C$ 523. The distance between London, Ontario and San Francisco is about 3508 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

According to our current data, WestJet (C$ 241), Air Canada (C$ 304), and United Airlines (C$ 347) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 55% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from London, Ontario to San Francisco?

Travelers seeking maximum savings on their London, Ontario to San Francisco flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

What are the most popular airlines that fly from London, Ontario to San Francisco?

Consider Air Canada, United Airlines or WestJet when booking your flight. These represent the most popular airlines when flying from London, Ontario to San Francisco.

What is the cheapest time of day to fly from YXU to SFO?

When flying from London, Ontario to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 20% versus a flight in the afternoon.

Can I find deals for flights from London to San Francisco that include hotel bookings?

Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.

Can I find deals for business class flights from London to San Francisco?

Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 239+ Flights from London, ON to San Francisco

Cheap flight deals from London to San Francisco

Round-trip from	C$ 523
One-way from	C$ 239
Popular in	December
Cheapest in	August
Average price	C$ 494

Air Canada
21/10-27/10
2 total stops
23h 29m total
London to San Francisco

Search Deals

27/10
2 total stops
16h 20m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 29% potential increase in price (C$ 308 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (C$ 45 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from London to San Francisco

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Tue 21/103:40 p.m.YXU - SFO

1 stop8h 13mAir Canada

Mon 27/102:30 p.m.SFO - YXU

1 stop15h 16mAir Canada

Deal found 16/9C$ 523

Fri 31/109:25 a.m.YXU - SFO

2 stops14h 57mUnited Airlines

Fri 7/117:10 p.m.SFO - YXU

2 stops18h 55mUnited Airlines

Deal found 16/9C$ 536

Thu 30/105:45 a.m.YXU - SFO

1 stop8h 09mUnited Airlines

Thu 6/118:30 a.m.SFO - YXU

1 stop9h 51mUnited Airlines

Deal found 15/9C$ 578

Sat 4/103:40 p.m.YXU - SFO

1 stop8h 52mUnited Airlines

Wed 8/105:00 a.m.SFO - YXU

2 stops25h 17mUnited Airlines

Deal found 15/9C$ 623

Sat 4/106:15 a.m.YXU - SFO

2 stops11h 25mMultiple Airlines

Wed 8/1011:35 a.m.SFO - YXU

2 stops18h 42mMultiple Airlines

Deal found 15/9C$ 630

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Tue 21/103:40 p.m.YXU - SFO

1 stop8h 13mAir Canada

Mon 27/102:30 p.m.SFO - YXU

1 stop15h 16mAir Canada

Deal found 16/9C$ 523

Fri 31/109:25 a.m.YXU - SFO

2 stops14h 57mUnited Airlines

Fri 7/117:10 p.m.SFO - YXU

2 stops18h 55mUnited Airlines

Deal found 16/9C$ 536

Tue 30/98:00 p.m.YXU - SFO

1 stop18h 54mWestJet

Fri 3/107:30 a.m.SFO - YXU

1 stop8h 37mWestJet

Deal found 17/9C$ 590

Sat 4/106:15 a.m.YXU - SFO

2 stops11h 25mMultiple Airlines

Wed 8/1011:35 a.m.SFO - YXU

2 stops18h 42mMultiple Airlines

Deal found 15/9C$ 630

Thu 5/25:45 a.m.YXU - SFO

2 stops12h 11mAir Canada

Mon 9/28:49 a.m.SFO - YXU

1 stop9h 32mAir Canada

Deal found 15/9C$ 528

Thu 5/29:25 a.m.YXU - SFO

2 stops10h 52mUnited Airlines

Sun 8/212:43 a.m.SFO - YXU

2 stops13h 22mUnited Airlines

Deal found 15/9C$ 536

Thu 30/105:45 a.m.YXU - SFO

1 stop8h 09mUnited Airlines

Thu 6/118:30 a.m.SFO - YXU

1 stop9h 51mUnited Airlines

Deal found 15/9C$ 578

Sat 4/103:40 p.m.YXU - SFO

1 stop8h 52mAir Canada

Wed 8/102:05 p.m.SFO - YXU

1 stop16h 12mAir Canada

Deal found 15/9C$ 623

Sat 4/103:40 p.m.YXU - SFO

1 stop8h 52mUnited Airlines

Wed 8/105:00 a.m.SFO - YXU

2 stops25h 17mUnited Airlines

Deal found 15/9C$ 623

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 17 September 2025 and is based on user searches.

Sat 4/103:40 p.m.YXU - SFO

1 stop8h 52mUnited Airlines

Wed 8/105:00 a.m.SFO - YXU

2 stops25h 17mUnited Airlines

Deal found 15/9C$ 623

Sat 4/106:15 a.m.YXU - SFO

2 stops11h 25mMultiple Airlines

Wed 8/1011:35 a.m.SFO - YXU

2 stops18h 42mMultiple Airlines

Deal found 15/9C$ 630

Tue 21/103:40 p.m.YXU - SFO

1 stop8h 13mAir Canada

Mon 27/102:30 p.m.SFO - YXU

1 stop15h 16mAir Canada

Deal found 16/9C$ 523

Thu 30/105:45 a.m.YXU - SFO

1 stop8h 09mUnited Airlines

Thu 6/118:30 a.m.SFO - YXU

1 stop9h 51mUnited Airlines

Deal found 15/9C$ 578

Fri 31/109:25 a.m.YXU - SFO

2 stops14h 57mUnited Airlines

Fri 7/117:10 p.m.SFO - YXU

2 stops18h 55mUnited Airlines

Deal found 16/9C$ 536

One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 September 2025.

Mon 27/108:10 p.m.YXU - SFO

2 stops16h 20mMultiple Airlines

Deal found 16/9C$ 239

Thu 30/105:45 a.m.YXU - SFO

1 stop8h 09mAir Canada

Deal found 15/9C$ 256

Thu 30/105:45 a.m.YXU - SFO

1 stop8h 09mUnited Airlines

Deal found 15/9C$ 292

Mon 27/108:10 p.m.YXU - SFO

1 stop19h 02mWestJet

Deal found 16/9C$ 303

Fri 31/109:25 a.m.YXU - SFO

1 stop15h 09mAir Canada

Deal found 16/9C$ 305

Thu 30/108:10 p.m.YXU - SFO

3 stops22h 19mMultiple Airlines

Deal found 15/9C$ 307

Thu 30/108:10 p.m.YXU - SFO

1 stop19h 02mWestJet

Deal found 15/9C$ 415

Fri 31/105:45 a.m.YXU - SFO

1 stop8h 09mUnited Airlines

Deal found 16/9C$ 464

Fri 31/108:10 p.m.YXU - SFO

3 stops24h 33mMultiple Airlines

Deal found 16/9C$ 574

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 21/10

3:40 p.m.-8:53 p.m.

1 stop8h 13m

San Francisco

Mon 27/10

2:30 p.m.-8:46 a.m.

1 stop15h 16m

C$ 523

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 5/2

5:45 a.m.-2:56 p.m.

2 stops12h 11m

San Francisco

Mon 9/2

8:49 a.m.-9:21 p.m.

1 stop9h 32m

C$ 528

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 31/10

9:25 a.m.-9:22 p.m.

2 stops14h 57m

San Francisco

Fri 7/11

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

2 stops18h 55m

C$ 536

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 5/2

9:25 a.m.-5:17 p.m.

2 stops10h 52m

San Francisco

Sun 8/2

12:43 a.m.-5:05 p.m.

2 stops13h 22m

C$ 536

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 30/10

5:45 a.m.-10:54 a.m.

1 stop8h 09m

San Francisco

Thu 6/11

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

1 stop9h 51m

C$ 578

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 30/9

8:00 p.m.-11:54 a.m.

1 stop18h 54m

San Francisco

Fri 3/10

7:30 a.m.-7:07 p.m.

1 stop8h 37m

C$ 590

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 4/10

3:40 p.m.-9:32 p.m.

1 stop8h 52m

San Francisco

Wed 8/10

2:05 p.m.-9:17 a.m.

1 stop16h 12m

C$ 623

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 4/10

3:40 p.m.-9:32 p.m.

1 stop8h 52m

San Francisco

Wed 8/10

5:00 a.m.-9:17 a.m.

2 stops25h 17m

C$ 623

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 4/10

6:15 a.m.-2:40 p.m.

2 stops11h 25m

San Francisco

Wed 8/10

11:35 a.m.-9:17 a.m.

2 stops18h 42m

C$ 630

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 27/10

8:10 p.m.-9:30 a.m.

2 stops16h 20m

C$ 239

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/9

Showing 1-10 of 18 results

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

Prices

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 276). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from London to San Francisco, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,926 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

WestJet

7.2

Good

3,095 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Air Canada

7.1

Good

10,000 reviews

United Airlines

7.4

Good

8,926 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

How long is the flight from London, Ontario to San Francisco?
A quick flight from London, Ontario to San Francisco can take about 8h 13m. Air Canada provides one of the quickest options available for as low as C$ 523. The distance between London, Ontario and San Francisco is about 3508 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?
According to our current data, WestJet (C$ 241), Air Canada (C$ 304), and United Airlines (C$ 347) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 55% cheaper than the average price of flights available within the next 90 days to this destination.
Can I find deals for flights from London to San Francisco that include hotel bookings?
Yes. In addition to deals on London to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.
Can I find deals for business class flights from London to San Francisco?
Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London, Ontario to San Francisco?
Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 276). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 368). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Richmond

Newark

Alameda

Redwood City

Burlingame

San Bruno

South San Francisco

Scotts Valley

Belmont

Novato

Millbrae

Santa Clara

Vallejo

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 241	AverageC$ 420	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 304	AverageC$ 615	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 347	AverageC$ 628	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Francisco.

Can Cheapflights find flights from London to San Francisco with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to San Francisco flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

Of course! You can now track prices for flights from London to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London, ON to San Francisco from C$ 239

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to San Francisco

Cheapest flights from London to San FranciscoExplore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Cheapflights Fare Finder

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

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

What is the cheapest month to book a flight from London, Ontario to San Francisco?

What’s the top layover airport for flights from London, Ontario to San Francisco?

What’s the fastest layover option from London, Ontario to San Francisco?

What’s the fastest layover option from London, Ontario to San Francisco?

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from London to San Francisco, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from London, Ontario to San Francisco?

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

Can I find deals for flights from London to San Francisco that include hotel bookings?

How can I find direct flights from London to San Francisco?

Can I find deals for business class flights from London to San Francisco?

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from London to San Francisco

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

Can Cheapflights find flights from London to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.