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

A quick flight from London, Ontario to San Francisco can take about 12h 10m. WestJet provides one of the quickest options available for as low as C$ 405. 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$ 218+ 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 12 September 2026.

Mon 7/126:40 a.m. -

1 stop12h 10m

Sun 13/124:40 p.m. -

1 stop9h 55m

Deal found 11/9C$ 405

Thu 29/103:25 p.m. -

1 stop9h 05m

Sat 31/108:25 a.m. -

1 stop8h 27m

Deal found 9/9C$ 450

Fri 2/105:40 a.m. -

2 stops12h 41m

Tue 6/107:30 p.m. -

2 stops19h 13m

Deal found 11/9C$ 492

Thu 22/106:10 a.m. -

1 stop8h 50m

Thu 29/105:40 p.m. -

1 stop9h 55m

Deal found 7/9C$ 532

Mon 7/126:40 a.m. -

2 stops34h 08m

Sun 13/124:40 p.m. -

1 stop9h 55m

Deal found 11/9C$ 554

Mon 26/107:40 a.m. -

1 stop12h 10m

Mon 2/114:40 p.m. -

1 stop9h 55m

Deal found 11/9C$ 561

Wed 4/119:15 a.m. -

1 stop9h 25m

Tue 10/118:25 a.m. -

1 stop10h 27m

Deal found 7/9C$ 562

Find flight deals from London to San Francisco

Round-trip from	C$ 405
One-way from	C$ 218
Popular in	September
Cheapest in	January
Average price	C$ 1,640

WestJet
7/12-13/12
2 total stops
22h 05m total
London to San Francisco

Search Deals

Air Canada
23/11-31/12
1 total stop
9h 25m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 30% potential increase in price (C$ 546 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (C$ 103 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

Mon 23/11

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$ 218

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 22/11

5:30 a.m.-11:10 a.m.

1 stop8h 40m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 247

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 26/1

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$ 287

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 10/12

5:30 a.m.-1:10 p.m.

1 stop10h 40m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 288

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Wed 20/1

9:15 a.m.-9:33 p.m.

2 stops15h 18m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 292

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 24/11

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

2 stops11h 00m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 326

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 23/10

3:30 p.m.-9:21 a.m.

2 stops20h 51m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 326

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 10/12

3:20 p.m.-8:40 a.m.

2 stops20h 20m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 326

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 23/10

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

1 stop8h 50m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 356

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 24/1

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$ 357

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 19 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.

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 12h 10m. WestJet provides one of the quickest options available for as low as C$ 405. 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.

See more FAQs

Santa Clara

Burlingame

San Bruno

Roseville

Livermore

South San Francisco

Novato

Manteca

Vallejo

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Top airline flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 482	AverageC$ 984	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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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.

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Cheap flights from London, ON to San Francisco from C$ 218

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 23/11. 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 12 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 12 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 12 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 12 September 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 12 September 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 12 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 12 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 12 September 2026.

Find flight deals from London to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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.

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?

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to San Francisco

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

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

Book a non-stop flight to one of these other cities located in California.

Search flights from London to San Francisco by cabin class

Find flights from London to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

London and San Francisco flights

Browse other London and San Francisco flight options. Last updated on 12 September 2026.

Other flights from London

Browse through other flights departing from London. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to San Francisco

Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 September 2026.

Top airline flying from London to San Francisco

Fly with Cheapflights

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?

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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 12 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 12 September 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 12 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 12 September 2026.