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

WestJet and Air Canada can get you from San Francisco to London, Ontario in just under 7h 45m. Your travel time can differ by up to 11h 28m. San Francisco and London, Ontario are separated by a distance of 3508 km. This flight may include one or multiple stops.

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$ 243+ 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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Best

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One-way

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 10 September 2026.

Thu 22/106:00 a.m. -

1 stop7h 45m

Thu 29/107:40 a.m. -

1 stop12h 10m

Deal found 6/9C$ 498

Tue 13/101:00 p.m. -

1 stop13h 20m

Mon 26/107:40 a.m. -

2 stops32h 11m

Deal found 5/9C$ 517

Wed 18/114:40 p.m. -

1 stop12h 57m

Mon 23/113:25 p.m. -

1 stop9h 05m

Deal found 7/9C$ 521

Tue 13/106:00 a.m. -

1 stop20h 20m

Mon 26/107:40 a.m. -

1 stop12h 10m

Deal found 5/9C$ 527

Tue 20/101:00 p.m. -

1 stop13h 20m

Thu 22/106:10 a.m. -

1 stop8h 50m

Deal found 5/9C$ 542

Tue 17/114:55 p.m. -

2 stops18h 52m

Mon 23/115:30 a.m. -

1 stop10h 40m

Deal found 7/9C$ 558

Tue 20/107:30 p.m. -

2 stops19h 13m

Thu 22/108:20 p.m. -

2 stops22h 01m

Deal found 5/9C$ 567

Find flight deals from San Francisco to London

Round-trip from	C$ 498
One-way from	C$ 243

WestJet
22/10-29/10
2 total stops
19h 55m total
San Francisco to London

Search Deals

WestJet
10/10-31/12
1 total stop
24h 45m 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

Sat 10/10

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

1 stop13h 20m

London

Wed 31/12

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

Nonstop0h 00m

C$ 243

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Wed 18/11

8:25 a.m.-9:52 p.m.

1 stop10h 27m

London

Wed 31/12

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

Nonstop0h 00m

C$ 248

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Sat 10/10

7:30 p.m.-7:40 p.m.

2 stops21h 10m

London

Wed 31/12

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

Nonstop0h 00m

C$ 251

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 30/10

12:00 p.m.-8:37 a.m.

1 stop17h 37m

London

Wed 31/12

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

Nonstop0h 00m

C$ 251

Quickest round-trip

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Fri 25/9

10:51 p.m.-9:20 a.m.

1 stop7h 29m

London

Wed 31/12

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

Nonstop0h 00m

C$ 266

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Thu 22/10

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

1 stop7h 45m

London

Thu 29/10

7:40 a.m.-4:50 p.m.

1 stop12h 10m

C$ 498

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 13/10

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

1 stop13h 20m

London

Mon 26/10

7:40 a.m.-12:51 p.m.

2 stops32h 11m

C$ 517

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 13/10

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

1 stop20h 20m

London

Mon 26/10

7:40 a.m.-4:50 p.m.

1 stop12h 10m

C$ 527

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 20/10

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

1 stop13h 20m

London

Thu 22/10

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

1 stop8h 50m

C$ 542

San FranciscoLondon

SFO San Francisco - YXU London

SFOYXU

San Francisco

Tue 20/10

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

2 stops19h 13m

London

Thu 22/10

8:20 p.m.-3:21 p.m.

2 stops22h 01m

C$ 567

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 11 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?
WestJet and Air Canada can get you from San Francisco to London, Ontario in just under 7h 45m. Your travel time can differ by up to 11h 28m. San Francisco and London, Ontario are separated by a distance of 3508 km. This flight may include one or multiple stops.
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$ 243

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 10/10. 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 10 September 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 10 September 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 10 September 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 10 September 2026.

Last-minute flights from San Francisco to LondonDiscover last-minute flight deals from San Francisco to London. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to London. Data last updated 10 September 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 10 September 2026.

Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 10 September 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 10 September 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 10 September 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 10 September 2026.

Last-minute flights from San Francisco to London
Discover last-minute flight deals from San Francisco to London. Data last updated 10 September 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 10 September 2026.