Question 1

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

Accepted Answer

Flights via Toronto (YYZ) offer the fastest connection on this route, with an average layover time of 2h 14m.

Question 2

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

Accepted Answer

Flights via Toronto (YYZ) have the shortest average one-way travel time for 1-stop routes: 2h 37m.

Question 3

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

Accepted Answer

Calgary (YYC) – chosen by Cheapflights users on 50% of one-stop itineraries from San Francisco to London, Ontario on Cheapflights.

Question 4

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

Accepted Answer

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 629.

Question 5

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

Accepted Answer

Flying on WestJet is currently your cheapest option to London, Ontario, with prices starting at C$ 416. Another option worth looking into is United Airlines, starting at C$ 956 round trip. WestJet is priced at 25% lower than the current average price of a flight leaving 3 months from now.

Question 6

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

Accepted Answer

Currently, October is the cheapest month in which you can book a flight from San Francisco to London, Ontario (average of C$ 243). Flying from San Francisco to London, Ontario in December is currently the most expensive (average of C$ 478). 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 7

E

Accepted Answer

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.

Question 8

E

Accepted Answer

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).

Question 9

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

Accepted Answer

March is one of the best times of the year to fly to London, Ontario from San Francisco. Prices for March average C$ 558 per person but you can even find prices for as low as C$ 174. The most expensive prices can be found in the month of December. Opting for a March flight can save you 103% on your journey compared to booking in December

Question 10

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

Accepted Answer

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.

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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.

Question 13

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

Accepted Answer

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.

Question 14

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

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from San Francisco today with Cheapflights!

Question 15

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

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from San Francisco.

Question 16

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

Accepted Answer

Need flexible booking options for your flight to London from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 17

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

Accepted Answer

Of course! You can now track prices for flights from San Francisco to London 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$ 379
Popular in	December
Cheapest in	March
Average price	C$ 674

Cheap flights from San Francisco to London, ON from C$ 379

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.

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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 29 July 2025.

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 29 July 2025.

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Best time to book a flight from San Francisco to London

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

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

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

Share of one-stop round-trip flights from San Francisco to London, Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.

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

Average round-trip fare for 1-stop flights from San Francisco to London, Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.

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

Shortest average travel time for 1-stop one-way flights from San Francisco to London, Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

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

Average layover duration for 1-stop one-way flights from San Francisco to London, Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 29 July 2025.

Check out reviews from past customers who have flown with United Airlines and WestJet from San Francisco to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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?

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

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

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

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

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 29 July 2025.