Question 1

What’s the fastest layover option from London, Ontario to San Francisco?

Accepted Answer

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 8h 16m.

Question 2

What’s the cheapest layover airport for flights from London, Ontario to San Francisco?

Accepted Answer

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 439.

Question 3

What’s the top layover airport for flights from London, Ontario to San Francisco?

Accepted Answer

Toronto (YYZ) – chosen by Cheapflights users on 56% of one-stop itineraries from London, Ontario to San Francisco on Cheapflights.

Question 4

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Accepted Answer

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 1h 48m.

Question 5

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

Accepted Answer

A quick flight from London, Ontario to San Francisco can take about 8h 54m. WestJet provides one of the quickest options available for as low as C$ 400. The distance between London, Ontario and San Francisco is about 3508 km.

Question 6

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

Accepted Answer

According to our current data, WestJet (C$ 309), United Airlines (C$ 349), and Air Canada (C$ 367) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 46% cheaper than the average price of flights available within the next 90 days to this destination.

Question 7

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London, Ontario to San Francisco (average of C$ 276). Flying from London, Ontario to San Francisco in December is currently the most expensive (average of C$ 368). 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.

Question 8

What is the cheapest day to fly from London, Ontario to San Francisco?

Accepted Answer

Travelers seeking maximum savings on their London, Ontario to San Francisco flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 9

E

Accepted Answer

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.

Question 10

E

Accepted Answer

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).

Question 11

What are the most popular airlines that fly from London, Ontario to San Francisco?

Accepted Answer

Consider Air Canada, United Airlines or WestJet when booking your flight. These represent the most popular airlines when flying from London, Ontario to San Francisco.

Question 12

What is the cheapest day to fly round-trip from London, Ontario to San Francisco?

Accepted Answer

Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 32% on the overall cost on flights from London, Ontario to San Francisco.

Question 13

What is the cheapest month to fly from London, Ontario to San Francisco?

Accepted Answer

The best pricing can be found in the month of May. Prices to San Francisco from London, Ontario average C$ 582. You can even find prices in May for less than C$ 582, as users have found deals to San Francisco from as low as C$ 307. The month of December appears to be one of the more expensive times to travel to San Francisco from London, Ontario. Flying in the targeted month can save you up to 51%.

Question 14

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

Accepted Answer

When flying from London, Ontario to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 20% versus a flight in the afternoon.

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

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.

Question 17

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

Accepted Answer

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.

Question 18

How does Cheapflights help users find flights from London to San Francisco?

Accepted Answer

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.

Question 19

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

Accepted Answer

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.

Question 20

Can Cheapflights find flights from London to San Francisco with no change fees?

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to San Francisco flexibly with Cheapflights today.

Question 21

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

Accepted Answer

Of course! You can now track prices for flights from London to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	C$ 400
One-way from	C$ 241
Popular in	December
Cheapest in	May
Average price	C$ 719

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 309	AverageC$ 424	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
United Airlines	CheapestC$ 349	AverageC$ 632	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	CheapestC$ 367	AverageC$ 618	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Cheap flights from London, ON to San Francisco from C$ 241

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 3/10. 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

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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 August 2025.

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 August 2025.

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Best time to book a flight from London to San Francisco

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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?

What’s the top layover airport for flights from London, Ontario to San Francisco?

What’s the fastest layover option from London, Ontario to San Francisco?

What’s the fastest layover option from London, Ontario to San Francisco?

Which airport typically offers the quickest layover for flights from London, Ontario to San Francisco?

Reviews of airlines servicing San Francisco

Read through reviews of airlines operating flights from London to San Francisco, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?

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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Alternative routes for London to San Francisco

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Top 3 airlines flying from London to San Francisco

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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 August 2025.