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

A quick flight from London, Ontario to San Francisco can take about 9h 10m. WestJet provides one of the quickest options available for as low as C$ 745. 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$ 412+ 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.

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Best

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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 20 October 2026.

Thu 3/126:40 a.m. -

1 stop12h 10m

Thu 10/124:40 p.m. -

1 stop9h 55m

Deal found 19/10C$ 619

Thu 3/123:20 p.m. -

1 stop9h 10m

Thu 10/123:00 p.m. -

2 stops20h 42m

Deal found 19/10C$ 745

Thu 3/1210:00 a.m. -

3 stops29h 36m

Thu 10/124:40 p.m. -

1 stop9h 55m

Deal found 19/10C$ 750

Mon 30/119:05 p.m. -

1 stop15h 24m

Mon 7/129:35 p.m. -

2 stops14h 07m

Deal found 16/10C$ 791

Thu 24/125:30 a.m. -

2 stops12h 27m

Mon 28/124:40 p.m. -

1 stop12h 57m

Deal found 15/10C$ 869

Thu 24/125:30 a.m. -

1 stop8h 40m

Mon 28/124:40 p.m. -

1 stop12h 57m

Deal found 15/10C$ 907

Fri 13/113:25 p.m. -

1 stop9h 05m

Fri 20/115:10 p.m. -

2 stops24h 17m

Deal found 16/10C$ 1,051

Find flight deals from London to San Francisco

Round-trip from	C$ 590
One-way from	C$ 412
Popular in	August
Cheapest in	January
Average price	C$ 914

Air Canada
11/1-13/1
4 total stops
27h 40m total
London to San Francisco

Search Deals

United Airlines
30/11-31/12
1 total stop
17h 05m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (C$ 78 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease (C$ 80 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 30/11

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

1 stop17h 05m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 412

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 3/12

6:40 a.m.-3:50 p.m.

1 stop12h 10m

San Francisco

Thu 10/12

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

1 stop9h 55m

C$ 619

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Mon 11/1

9:15 a.m.-9:30 p.m.

1 stop15h 15m

San Francisco

Wed 13/1

4:40 p.m.-8:37 a.m.

1 stop12h 57m

C$ 715

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 3/12

3:20 p.m.-9:30 p.m.

1 stop9h 10m

San Francisco

Thu 10/12

3:00 p.m.-2:42 p.m.

2 stops20h 42m

C$ 745

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 3/12

10:00 a.m.-12:36 p.m.

3 stops29h 36m

San Francisco

Thu 10/12

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

1 stop9h 55m

C$ 750

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Mon 30/11

9:05 p.m.-9:29 a.m.

1 stop15h 24m

San Francisco

Mon 7/12

9:35 p.m.-2:42 p.m.

2 stops14h 07m

C$ 791

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 24/12

5:30 a.m.-2:57 p.m.

2 stops12h 27m

San Francisco

Mon 28/12

4:40 p.m.-8:37 a.m.

1 stop12h 57m

C$ 869

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 28/11

6:40 a.m.-3:35 p.m.

2 stops35h 55m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 915

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 28/11

9:05 p.m.-9:29 a.m.

1 stop15h 24m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 1,063

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/10

Sorted 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.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 426). Flying from London, Ontario to San Francisco in August is currently the most expensive (average of C$ 1,406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from London, Ontario to San Francisco?

Airfare is below average for this route at the moment.

London, Ontario to San Francisco flights typically cost between C$ 752 and C$ 1,041 in January.
The cheapest round-trip price found within the last 5 days was C$ 590 on Air Canada (11 Jan-13 Jan).

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 9h 10m. WestJet provides one of the quickest options available for as low as C$ 745. 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.
What is the cheapest month to book a flight from London, Ontario to San Francisco?
Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 426). Flying from London, Ontario to San Francisco in August is currently the most expensive (average of C$ 1,406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

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.

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Cheap flights from London, ON to San Francisco from C$ 412

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 30/11. 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 20 October 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 20 October 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 20 October 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 20 October 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 20 October 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 20 October 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 20 October 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 20 October 2026.

Find flight deals from London to San Francisco

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Popular in

Cheapest 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.

Cheapflights Insights

What is the cheapest month to book a flight from London, Ontario to San Francisco?

How much does it cost to fly round-trip from London, Ontario to San Francisco?

Airfare is below average for this route at the moment.

London, Ontario to San Francisco flights typically cost between C$ 752 and C$ 1,041 in January.The cheapest round-trip price found within the last 5 days was C$ 590 on Air Canada (11 Jan-13 Jan).

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?

What is the cheapest month to book a flight from London, Ontario to San Francisco?

Travelling to a place near 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.

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London and San Francisco flights

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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 20 October 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 20 October 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 20 October 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 20 October 2026.

London, Ontario to San Francisco flights typically cost between C$ 752 and C$ 1,041 in January.
The cheapest round-trip price found within the last 5 days was C$ 590 on Air Canada (11 Jan-13 Jan).