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

A quick flight from London, Ontario to San Francisco can take about 7h 59m. Air Canada provides one of the quickest options available for as low as C$ 408. The distance between London, Ontario and San Francisco is about 3508 km.

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$ 243+ 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 5 September 2026.

Tue 22/96:10 a.m. -

1 stop8h 50m

Thu 1/106:00 a.m. -

1 stop7h 45m

Deal found 3/9C$ 348

Tue 22/96:10 a.m. -

1 stop8h 50m

Sat 3/101:00 p.m. -

1 stop13h 20m

Deal found 3/9C$ 392

Fri 2/105:40 a.m. -

1 stop7h 59m

Tue 6/1011:35 a.m. -

1 stop7h 05m

Deal found 1/9C$ 408

Tue 22/96:10 a.m. -

1 stop8h 50m

Mon 5/104:21 p.m. -

2 stops33h 59m

Deal found 3/9C$ 430

Fri 2/105:55 p.m. -

1 stop21h 05m

Tue 6/106:00 a.m. -

1 stop20h 20m

Deal found 2/9C$ 435

Sat 17/105:40 a.m. -

1 stop7h 59m

Tue 10/114:40 p.m. -

1 stop12h 57m

Deal found 1/9C$ 441

Mon 21/96:20 p.m. -

1 stop7h 44m

Tue 6/108:30 a.m. -

1 stop8h 10m

Deal found 3/9C$ 449

Wed 23/96:10 a.m. -

1 stop8h 50m

Wed 30/96:05 p.m. -

1 stop8h 15m

Deal found 3/9C$ 456

Mon 21/95:55 p.m. -

1 stop21h 05m

Wed 30/96:05 p.m. -

1 stop8h 15m

Deal found 3/9C$ 463

Tue 22/96:10 a.m. -

1 stop8h 50m

Tue 6/1011:40 a.m. -

2 stops14h 40m

Deal found 3/9C$ 474

Find flight deals from London to San Francisco

Round-trip from	C$ 348
One-way from	C$ 243
Popular in	September
Cheapest in	January
Average price	C$ 1,636

WestJet
22/9-1/10
2 total stops
16h 35m total
London to San Francisco

Search Deals

WestJet
11/9-31/12
1 total stop
18h 45m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 30% potential increase in price (C$ 542 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 September 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

Fri 11/9

3:30 p.m.-8:59 p.m.

1 stop8h 29m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 257

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 17/10

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

1 stop8h 50m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 292

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 11/9

6:10 a.m.-6:24 p.m.

3 stops39h 14m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 321

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 17/10

10:05 a.m.-9:26 p.m.

2 stops14h 21m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 323

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 10/10

3:30 p.m.-7:41 a.m.

2 stops19h 11m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 323

Quickest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 11/9

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

1 stop8h 04m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 334

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 12/9

5:40 a.m.-12:30 a.m.

2 stops21h 50m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 345

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Thu 8/10

10:05 a.m.-7:41 a.m.

2 stops24h 36m

San Francisco

Wed 31/12

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

Nonstop0h 00m

C$ 369

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Fri 2/10

5:40 a.m.-10:39 a.m.

1 stop7h 59m

San Francisco

Tue 6/10

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

1 stop7h 05m

C$ 408

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 17/10

10:05 a.m.-7:32 p.m.

2 stops12h 27m

San Francisco

Tue 10/11

11:30 p.m.-2:47 p.m.

2 stops12h 17m

C$ 568

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 13 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 7h 59m. Air Canada provides one of the quickest options available for as low as C$ 408. The distance between London, Ontario and San Francisco is about 3508 km.
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.

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Cheap flights from London, ON to San Francisco 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 11/9. 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 5 September 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 5 September 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 5 September 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 5 September 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 5 September 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 5 September 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 5 September 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Find flight deals from London to San Francisco

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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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Complete your trip

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Direct flights to California

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London and San Francisco flights

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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 5 September 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 5 September 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 5 September 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 5 September 2026.