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

According to our current data, WestJet (C$ 360), Air Canada (C$ 385), and United Airlines (C$ 409) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 44% cheaper than the average price of flights available within the next 90 days to this destination.

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

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.

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

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.

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

The best pricing can be found in the month of June. Prices to San Francisco from London, Ontario average C$ 648. You can even find prices in June for less than C$ 648, as users have found deals to San Francisco from as low as C$ 298. 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 43%.

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$ 360+ Flights from London, ON to San Francisco

Cheap flight deals from London to San Francisco

Round-trip from	C$ 360
Popular in	December
Cheapest in	June
Average price	C$ 657

WestJet
17/5-24/5
2 total stops
36h 34m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (C$ 210 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (C$ 38 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from London to San Francisco

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 3 April 2025.

Sat 17/58:00 p.m.YXU - SFO

1 stop28h 25mWestJet

Sat 24/56:05 p.m.SFO - YXU

1 stop8h 09mWestJet

Deal found 1/4C$ 360

Tue 13/53:45 p.m.YXU - SFO

1 stop9h 04mAir Canada

Mon 9/610:56 p.m.SFO - YXU

1 stop7h 22mAir Canada

Deal found 2/4C$ 385

Sat 17/53:40 p.m.YXU - SFO

1 stop9h 09mUnited Airlines

Sat 24/510:45 p.m.SFO - YXU

2 stops13h 18mUnited Airlines

Deal found 1/4C$ 409

Tue 22/43:25 p.m.YXU - SFO

1 stop9h 24mMultiple Airlines

Wed 21/52:15 p.m.SFO - YXU

1 stop16h 03mMultiple Airlines

Deal found 2/4C$ 627

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 3 April 2025.

Sat 17/58:00 p.m.YXU - SFO

1 stop28h 25mWestJet

Sat 24/56:05 p.m.SFO - YXU

1 stop8h 09mWestJet

Deal found 1/4C$ 360

Tue 13/53:45 p.m.YXU - SFO

1 stop9h 04mAir Canada

Mon 9/610:56 p.m.SFO - YXU

1 stop7h 22mAir Canada

Deal found 2/4C$ 385

Sat 17/53:40 p.m.YXU - SFO

1 stop9h 09mUnited Airlines

Sat 24/510:45 p.m.SFO - YXU

2 stops13h 18mUnited Airlines

Deal found 1/4C$ 409

Tue 13/58:00 p.m.YXU - SFO

2 stops44h 59mMultiple Airlines

Mon 9/610:15 a.m.SFO - YXU

3 stops15h 59mMultiple Airlines

Deal found 2/4C$ 705

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 3 April 2025 and is based on user searches.

Tue 22/43:25 p.m.YXU - SFO

1 stop9h 24mMultiple Airlines

Wed 21/52:15 p.m.SFO - YXU

1 stop16h 03mMultiple Airlines

Deal found 2/4C$ 627

Tue 13/53:45 p.m.YXU - SFO

1 stop9h 04mAir Canada

Mon 9/610:56 p.m.SFO - YXU

1 stop7h 22mAir Canada

Deal found 2/4C$ 385

Sat 17/58:00 p.m.YXU - SFO

1 stop28h 25mWestJet

Sat 24/56:05 p.m.SFO - YXU

1 stop8h 09mWestJet

Deal found 1/4C$ 360

Sat 17/53:40 p.m.YXU - SFO

1 stop9h 09mUnited Airlines

Sat 24/510:45 p.m.SFO - YXU

2 stops13h 18mUnited Airlines

Deal found 1/4C$ 409

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

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 17/5

8:00 p.m.-9:25 p.m.

1 stop28h 25m

San Francisco

Sat 24/5

6:05 p.m.-5:14 a.m.

1 stop8h 09m

C$ 360

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 13/5

3:45 p.m.-9:49 p.m.

1 stop9h 04m

San Francisco

Mon 9/6

10:56 p.m.-9:18 a.m.

1 stop7h 22m

C$ 385

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 17/5

3:40 p.m.-9:49 p.m.

1 stop9h 09m

San Francisco

Sat 24/5

10:45 p.m.-3:03 p.m.

2 stops13h 18m

C$ 409

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 22/4

3:25 p.m.-9:49 p.m.

1 stop9h 24m

San Francisco

Wed 21/5

2:15 p.m.-9:18 a.m.

1 stop16h 03m

C$ 627

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

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.

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$ 276). Flying from London, Ontario to San Francisco in June is currently the most expensive (average of C$ 379). 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.

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 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.

Rainfall in San Francisco by month

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.

Temperature in San Francisco by month

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).

Reviews of airlines servicing San Francisco

United Airlines

7.4

Good

8,619 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

United Airlines

7.4

Good

8,619 reviews

United Airlines

7.4

Good

8,619 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

WestJet

7.2

Good

2,795 reviews

United Airlines

7.4

Good

8,619 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Air Canada

7.0

Good

9,029 reviews

United Airlines

7.4

Good

8,619 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2024

YVR - SFO

It was a good experience. The flight took 45 minutes longer to fly and all passengers had to wait inside the plane till the technical issue was fixed. Overall it was a good experience.

Related info for your journey

What are the cheapest airlines flying from London, Ontario to San Francisco round-trip?
According to our current data, WestJet (C$ 360), Air Canada (C$ 385), and United Airlines (C$ 409) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 44% cheaper than the average price of flights available within the next 90 days to this destination.
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$ 276). Flying from London, Ontario to San Francisco in June is currently the most expensive (average of C$ 379). 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

Richmond

San Ramon

Newark

Alameda

Redwood City

Burlingame

San Bruno

South San Francisco

Scotts Valley

Novato

Belmont

Millbrae

Santa Clara

Vallejo

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from London to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 319	AverageC$ 524	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 396	AverageC$ 640	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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

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.

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

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

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

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.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London, ON to San Francisco from C$ 360

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 17/5. 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

Round-trip from

Popular in

Cheapest in

Average price

Find 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 3 April 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 3 April 2025.

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

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

Find hourly flight availability from London to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 April 2025.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco

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.

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 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 London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from London to San Francisco

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

100% Free

Book with Flexibility

Travel Smart

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 3 April 2025.