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

A quick flight from London, Ontario to San Francisco can take about 8h 04m. Air Canada provides one of the quickest options available for as low as C$ 520. 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$ 284+ 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 24 August 2026.

Fri 11/96:10 a.m. -

1 stop8h 50m

Mon 14/96:00 a.m. -

1 stop20h 20m

Deal found 19/8C$ 430

Fri 11/96:10 a.m. -

1 stop8h 50m

Wed 16/96:05 p.m. -

1 stop8h 15m

Deal found 19/8C$ 443

Wed 9/95:40 a.m. -

1 stop9h 54m

Wed 16/911:35 a.m. -

1 stop7h 05m

Deal found 19/8C$ 465

Wed 9/96:20 p.m. -

1 stop7h 44m

Sun 13/98:10 a.m. -

2 stops10h 30m

Deal found 19/8C$ 471

Sun 18/106:10 a.m. -

1 stop8h 50m

Sat 24/101:00 p.m. -

1 stop13h 20m

Deal found 20/8C$ 476

Fri 2/105:55 p.m. -

1 stop21h 05m

Sun 4/106:00 a.m. -

1 stop7h 45m

Deal found 19/8C$ 483

Wed 7/106:10 a.m. -

1 stop18h 45m

Wed 14/106:05 p.m. -

1 stop8h 15m

Deal found 22/8C$ 493

Fri 11/96:10 a.m. -

1 stop8h 50m

Sat 12/96:00 a.m. -

1 stop20h 20m

Deal found 19/8C$ 504

Thu 8/106:10 a.m. -

1 stop8h 50m

Tue 13/106:00 a.m. -

1 stop20h 20m

Deal found 19/8C$ 507

Wed 9/95:40 a.m. -

1 stop8h 04m

Wed 9/912:05 a.m. -

1 stop14h 38m

Deal found 19/8C$ 516

Thu 10/910:05 a.m. -

1 stop8h 19m

Sun 13/912:50 p.m. -

2 stops17h 30m

Deal found 19/8C$ 518

Tue 8/93:30 p.m. -

1 stop10h 34m

Sun 13/98:10 a.m. -

2 stops10h 30m

Deal found 19/8C$ 520

Find flight deals from London to San Francisco

Round-trip from	C$ 430
One-way from	C$ 284
Popular in	September
Cheapest in	January
Average price	C$ 1,373

WestJet
11/9-14/9
2 total stops
29h 10m total
London to San Francisco

Search Deals

Air Canada
15/10
1 total stop
8h 04m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 30% potential increase in price (C$ 539 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (C$ 101 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

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 10/9

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

1 stop8h 04m

San Francisco

Sat 12/9

12:05 a.m.-2:50 p.m.

1 stop11h 45m

C$ 520

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 6/10

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

1 stop8h 50m

San Francisco

Tue 13/10

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

1 stop20h 20m

C$ 527

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$ 530

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$ 551

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

Mon 5/10

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

1 stop20h 20m

C$ 559

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

7:30 p.m.-5:43 p.m.

2 stops19h 13m

C$ 566

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sun 6/9

6:20 p.m.-11:02 p.m.

1 stop7h 42m

San Francisco

Wed 9/9

12:35 a.m.-2:50 p.m.

2 stops11h 15m

C$ 585

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Wed 7/10

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

1 stop8h 50m

San Francisco

Wed 14/10

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

2 stops19h 00m

C$ 626

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Tue 6/10

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

1 stop8h 04m

San Francisco

Mon 12/10

12:35 a.m.-9:40 p.m.

2 stops18h 05m

C$ 639

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Wed 7/10

3:30 p.m.-10:51 p.m.

2 stops10h 21m

San Francisco

Tue 13/10

12:35 a.m.-2:50 p.m.

2 stops11h 15m

C$ 646

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 8h 04m. Air Canada provides one of the quickest options available for as low as C$ 520. 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

Vallejo

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Cheap flights from London, ON to San Francisco from C$ 284

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 15/10. 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

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 24 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 24 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 24 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 24 August 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 24 August 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 24 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 24 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 24 August 2026.

Find flight deals from London to San Francisco

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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

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 24 August 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 24 August 2026.

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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 24 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 24 August 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 24 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 24 August 2026.