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

A quick flight from London, Ontario to San Francisco can take about 8h 50m. WestJet provides one of the quickest options available for as low as C$ 505. 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.

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 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 decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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$ 264+ Cheap Flights from London, ON to San Francisco

Cheap flight deals from London to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 21 September 2026.

Fri 2/106:10 a.m. -

1 stop8h 50m

Tue 6/101:00 p.m. -

1 stop13h 20m

Deal found 18/9C$ 505

Fri 2/1010:05 a.m. -

2 stops12h 27m

Tue 6/1011:30 p.m. -

2 stops12h 20m

Deal found 18/9C$ 570

Sun 18/106:10 a.m. -

1 stop8h 50m

Sun 25/105:40 p.m. -

1 stop9h 55m

Deal found 20/9C$ 604

Fri 2/1010:05 a.m. -

2 stops11h 19m

Tue 6/1010:51 p.m. -

1 stop12h 59m

Deal found 17/9C$ 621

Sun 1/118:30 p.m. -

2 stops26h 28m

Tue 3/1112:55 a.m. -

2 stops10h 52m

Deal found 17/9C$ 624

Sun 1/118:30 p.m. -

1 stop17h 40m

Wed 4/112:00 p.m. -

1 stop15h 37m

Deal found 17/9C$ 666

Thu 8/108:20 p.m. -

1 stop17h 19m

Tue 13/108:30 a.m. -

1 stop8h 10m

Deal found 17/9C$ 667

Sun 1/118:30 p.m. -

2 stops28h 16m

Sun 8/1111:29 p.m. -

1 stop12h 18m

Deal found 17/9C$ 674

Thu 8/106:10 a.m. -

1 stop18h 45m

Tue 13/106:00 a.m. -

1 stop20h 20m

Deal found 18/9C$ 755

Find flight deals from London to San Francisco

Round-trip from	C$ 505
One-way from	C$ 264
Popular in	September
Cheapest in	January
Average price	C$ 1,656

WestJet
2/10-6/10
2 total stops
22h 10m total
London to San Francisco

Search Deals

Air Canada
3/11-31/12
1 total stop
9h 25m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 33% potential increase in price (C$ 613 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (C$ 100 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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

Cheapest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 3/11

9:15 a.m.-3:40 p.m.

1 stop9h 25m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 264

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 3/11

9:15 a.m.-9:24 p.m.

2 stops15h 09m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 319

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Mon 25/1

6:40 a.m.-3:50 p.m.

1 stop12h 10m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 352

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 27/2

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

1 stop9h 00m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 352

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Mon 22/2

9:15 a.m.-12:36 a.m.

2 stops18h 21m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 361

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 24/1

5:30 a.m.-1:45 p.m.

2 stops11h 15m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 361

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 29/1

5:30 a.m.-1:45 p.m.

2 stops11h 15m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 361

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 21/2

3:20 p.m.-1:16 a.m.

2 stops12h 56m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 361

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

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

1 stop8h 50m

San Francisco

Tue 6/10

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

1 stop13h 20m

C$ 505

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

10:05 a.m.-7:32 p.m.

2 stops12h 27m

San Francisco

Tue 6/10

11:30 p.m.-2:50 p.m.

2 stops12h 20m

C$ 570

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/9

Showing 1-10 of 16 resultsSorted by cheapest first

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.

YXU-SFO

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

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$ 422). Flying from London, Ontario to San Francisco in September is currently the most expensive (average of C$ 1,656). 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.

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 50m. WestJet provides one of the quickest options available for as low as C$ 505. 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.
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$ 422). Flying from London, Ontario to San Francisco in September is currently the most expensive (average of C$ 1,656). 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

Santa Clara

Burlingame

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Novato

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Cheap flights from London, ON to San Francisco from C$ 264

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. 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

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 21 September 2026.

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 21 September 2026.

Best flights from London to San FranciscoDiscover 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 21 September 2026.

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 21 September 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 21 September 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 21 September 2026 and is based on user searches.

One-way flights from London to San FranciscoSearch for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Find flight deals from London to San Francisco

Round-trip from

One-way from

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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

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

Related info for your journey

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

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?

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Alternative routes for London to San Francisco

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Complete your trip

Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to California

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London and San Francisco flights

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

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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?

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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 21 September 2026.

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 21 September 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 21 September 2026 and is based on user searches.

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 21 September 2026.