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

A quick flight from London, Ontario to San Francisco can take about 12h 41m. 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.

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$ 320+ 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 27 August 2026.

Thu 24/95:40 a.m. -

1 stop8h 04m

Sun 27/912:05 a.m. -

1 stop11h 45m

Deal found 27/8C$ 444

Wed 7/106:10 a.m. -

1 stop18h 45m

Wed 14/106:05 p.m. -

1 stop8h 15m

Deal found 22/8C$ 496

Thu 8/106:10 a.m. -

1 stop8h 50m

Tue 13/106:00 a.m. -

1 stop20h 20m

Deal found 26/8C$ 509

Fri 2/105:40 a.m. -

1 stop8h 04m

Mon 5/104:30 p.m. -

2 stops13h 50m

Deal found 25/8C$ 523

Thu 8/106:10 a.m. -

1 stop18h 45m

Thu 15/106:00 a.m. -

1 stop7h 45m

Deal found 23/8C$ 534

Fri 2/105:55 p.m. -

1 stop21h 05m

Mon 5/106:00 a.m. -

1 stop7h 45m

Deal found 25/8C$ 559

Find flight deals from London to San Francisco

Round-trip from	C$ 444
One-way from	C$ 320
Popular in	September
Cheapest in	January
Average price	C$ 1,383

Air Canada
24/9-27/9
2 total stops
19h 49m total
London to San Francisco

Search Deals

Air Canada
22/2
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$ 547 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (C$ 102 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 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

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

5:40 a.m.-3:21 p.m.

2 stops12h 41m

San Francisco

Tue 6/10

11:35 a.m.-9:40 p.m.

1 stop7h 05m

C$ 523

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

5:40 a.m.-3:21 p.m.

2 stops12h 41m

San Francisco

Mon 5/10

4:30 p.m.-9:20 a.m.

2 stops13h 50m

C$ 523

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 8/10

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

1 stop18h 45m

San Francisco

Thu 15/10

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

1 stop7h 45m

C$ 534

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 8/10

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

1 stop18h 45m

San Francisco

Tue 13/10

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

1 stop20h 20m

C$ 552

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

5:55 p.m.-12:00 p.m.

1 stop21h 05m

San Francisco

Mon 5/10

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

1 stop7h 45m

C$ 559

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 24/9

5:40 a.m.-10:44 a.m.

1 stop8h 04m

San Francisco

Mon 28/9

10:40 p.m.-2:50 p.m.

2 stops13h 10m

C$ 585

Cheapest one-way

Quickest one-way

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 6/10

5:40 a.m.-10:44 a.m.

1 stop8h 04m

C$ 324

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 10/10

10:05 a.m.-6:54 p.m.

2 stops11h 49m

C$ 358

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Mon 5/10

3:30 p.m.-11:44 a.m.

2 stops23h 14m

C$ 359

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 6/10

6:10 a.m.-10:22 a.m.

3 stops31h 12m

C$ 373

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/8

Showing 1-10 of 17 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 41m. 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.
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

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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.

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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.

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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$ 320

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 22/2. 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 27 August 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 27 August 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 27 August 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 27 August 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 27 August 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 27 August 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 27 August 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 27 August 2026.

Find flight deals from London to San Francisco

Round-trip from

One-way from

Popular in

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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.

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

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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

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

Search flights from London to San Francisco by cabin class

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London and San Francisco flights

Browse other London and San Francisco flight options. Last updated on 27 August 2026.

Other flights from London

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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 27 August 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 27 August 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 27 August 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 27 August 2026.