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

Air Canada can get you from San Francisco to London, Ontario in just under 12h 22m. Your travel time can differ by up to . San Francisco and London, Ontario are separated by a distance of 3508 km.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to London, Ontario as you normally would.

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

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

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

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

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

Yes. Cheapflights offers flight deals from San Francisco to London 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$ 486+ Cheap Flights from San Francisco to London, ON

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

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Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.

Sat 14/118:25 a.m. -

1 stop9h 02m

Sat 21/119:05 p.m. -

1 stop17h 05m

Deal found 22/10C$ 664

Sun 6/1212:10 a.m. -

2 stops11h 32m

Mon 14/123:20 p.m. -

1 stop9h 10m

Deal found 23/10C$ 926

Fri 6/114:40 p.m. -

1 stop12h 57m

Mon 9/113:25 p.m. -

1 stop9h 05m

Deal found 23/10C$ 935

Wed 9/1212:10 a.m. -

2 stops11h 32m

Thu 17/125:30 a.m. -

1 stop8h 40m

Deal found 26/10C$ 960

Wed 4/118:10 a.m. -

1 stop9h 17m

Mon 9/119:15 a.m. -

1 stop9h 25m

Deal found 24/10C$ 1,317

Find flight deals from San Francisco to London

Round-trip from	C$ 540
One-way from	C$ 486

Air Canada
22/4-24/4
3 total stops
24h 06m total
San Francisco to London

Search Deals

Air Canada
31/12-31/12
1 total stop
12h 57m total
San Francisco to London

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Mon 28/12

2:45 p.m.-2:42 p.m.

2 stops20h 57m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 520

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 1/1

5:00 a.m.-9:52 p.m.

2 stops13h 52m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 556

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Wed 30/12

5:00 a.m.-9:52 p.m.

2 stops13h 52m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 556

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Mon 18/1

6:30 a.m.-9:52 p.m.

2 stops12h 22m

London

Thu 21/1

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

1 stop9h 00m

C$ 575

Quickest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Thu 17/12

4:40 p.m.-5:35 a.m.

1 stop9h 55m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 641

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Sat 14/11

8:25 a.m.-8:27 p.m.

1 stop9h 02m

London

Sat 21/11

9:05 p.m.-11:10 a.m.

1 stop17h 05m

C$ 664

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Sun 1/11

9:15 a.m.-5:35 a.m.

2 stops17h 20m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 706

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 22/12

1:55 p.m.-8:32 a.m.

2 stops15h 37m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 743

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 18/12

1:55 p.m.-8:37 a.m.

2 stops15h 42m

London

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 743

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Thu 22/4

10:35 p.m.-2:39 p.m.

2 stops13h 04m

London

Sat 24/4

5:30 a.m.-1:47 p.m.

2 stops11h 17m

C$ 771

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/10

Showing 1-10 of 15 resultsSorted by cheapest first

Best time to book a flight from San Francisco to London

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

SFO-YXU

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 San Francisco to London, Ontario?
Air Canada can get you from San Francisco to London, Ontario in just under 12h 22m. Your travel time can differ by up to . San Francisco and London, Ontario are separated by a distance of 3508 km.
Can I find deals for flights from San Francisco to London that include hotel bookings?
Yes. In addition to deals on San Francisco to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Francisco to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.
Can I find deals for business class flights from San Francisco to London?
Yes. Cheapflights offers flight deals from San Francisco to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from San Francisco to London, ON from C$ 486

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 31/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from San Francisco to London

Cheapest flights from San Francisco to LondonExplore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.

Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.

Best flights from San Francisco to LondonDiscover carefully curated flight deals from San Francisco to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 27 October 2026.

Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 27 October 2026.

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

Discover last-minute flight deals from San Francisco to London. Data last updated 27 October 2026 and is based on user searches.

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

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

Find flight deals from San Francisco to London

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

Best time to book a flight from San Francisco to London

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

Related info for your journey

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

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

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

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

Travelling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to London

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

Complete your trip

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

Direct flights to Ontario

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

Search flights from San Francisco to London by cabin class

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

Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 27 October 2026.

San Francisco and London flights

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Other flights from San Francisco

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

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Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 October 2026.

Best flights from San Francisco to London
Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 27 October 2026.

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

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