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

According to our current data, WestJet (C$ 364), United Airlines (C$ 372), and Air Canada (C$ 402) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 50% 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 August. Prices to San Francisco from London, Ontario average C$ 732. You can even find prices in August for less than C$ 732, as users have found deals to San Francisco from as low as C$ 547. 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 28%.

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$ 214+ Flights from London, ON to San Francisco

Cheap flight deals from London to San Francisco

Round-trip from	C$ 364
One-way from	C$ 214
Popular in	December
Cheapest in	August
Average price	C$ 729

WestJet
8/7-15/7
3 total stops
19h 38m total
London to San Francisco

Search Deals

Air Canada
16/4
1 total stop
9h 12m total
London to San Francisco

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (C$ 102 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 March 2025.

Tue 8/76:00 a.m.YXU - SFO

2 stops10h 59mWestJet

Tue 15/77:30 a.m.SFO - YXU

1 stop8h 39mWestJet

Deal found 3/3C$ 364

Sat 29/33:20 p.m.YXU - SFO

1 stop9h 22mUnited Airlines

Tue 15/48:30 a.m.SFO - YXU

1 stop8h 49mUnited Airlines

Deal found 2/3C$ 372

Wed 26/35:15 a.m.YXU - SFO

1 stop8h 37mAir Canada

Sat 12/412:08 a.m.SFO - YXU

2 stops17h 11mAir Canada

Deal found 2/3C$ 402

Mon 31/38:00 p.m.YXU - SFO

1 stop20h 06mMultiple Airlines

Thu 17/47:47 p.m.SFO - YXU

2 stops12h 33mMultiple Airlines

Deal found 2/3C$ 664

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 March 2025.

Tue 8/76:00 a.m.YXU - SFO

2 stops10h 59mWestJet

Tue 15/77:30 a.m.SFO - YXU

1 stop8h 39mWestJet

Deal found 3/3C$ 364

Sat 29/33:20 p.m.YXU - SFO

1 stop9h 22mUnited Airlines

Sun 13/410:52 p.m.SFO - YXU

1 stop7h 21mUnited Airlines

Deal found 2/3C$ 372

Wed 26/35:15 a.m.YXU - SFO

1 stop8h 37mAir Canada

Sat 12/412:08 a.m.SFO - YXU

2 stops17h 11mAir Canada

Deal found 2/3C$ 402

Mon 31/38:00 p.m.YXU - SFO

1 stop20h 06mMultiple Airlines

Thu 17/47:47 p.m.SFO - YXU

2 stops12h 33mMultiple Airlines

Deal found 2/3C$ 664

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

Wed 26/35:15 a.m.YXU - SFO

1 stop8h 37mAir Canada

Sat 12/412:08 a.m.SFO - YXU

2 stops17h 11mAir Canada

Deal found 2/3C$ 402

Sat 29/33:20 p.m.YXU - SFO

1 stop9h 22mUnited Airlines

Sun 13/410:52 p.m.SFO - YXU

1 stop7h 21mUnited Airlines

Deal found 2/3C$ 372

Mon 31/38:00 p.m.YXU - SFO

1 stop20h 06mMultiple Airlines

Thu 17/47:47 p.m.SFO - YXU

2 stops12h 33mMultiple Airlines

Deal found 2/3C$ 664

Sun 27/48:00 p.m.YXU - SFO

2 stops20h 59mWestJet

Thu 1/52:45 p.m.SFO - YXU

2 stops49h 24mWestJet

Deal found 3/3C$ 709

Find flights from London to San Francisco within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 8/7

6:00 a.m.-1:59 p.m.

2 stops10h 59m

San Francisco

Tue 15/7

7:30 a.m.-7:09 p.m.

1 stop8h 39m

C$ 364

LondonSan Francisco

YXU - SFO

YXUSFO

London

Sat 29/3

3:20 p.m.-9:42 p.m.

1 stop9h 22m

San Francisco

Sun 13/4

10:52 p.m.-9:13 a.m.

1 stop7h 21m

C$ 372

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 26/3

3:20 p.m.-9:42 p.m.

1 stop9h 22m

San Francisco

Wed 16/4

6:42 a.m.-8:19 p.m.

2 stops10h 37m

C$ 402

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 31/3

8:00 p.m.-1:06 p.m.

1 stop20h 06m

San Francisco

Thu 17/4

7:47 p.m.-11:20 a.m.

2 stops12h 33m

C$ 664

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 16/4

3:25 p.m.-9:37 p.m.

1 stop9h 12m

C$ 214

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 16/4

8:00 p.m.-2:42 p.m.

3 stops21h 42m

C$ 749

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

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.

Travel insights for flights from London to San Francisco

Get recent, data-driven insights about flights from London to San Francisco including ideal travel times, pricing trends, and more.

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

8,679 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

8,679 reviews

United Airlines

7.4

Good

8,679 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

2,788 reviews

United Airlines

7.4

Good

8,679 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

8,830 reviews

United Airlines

7.4

Good

8,679 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$ 364), United Airlines (C$ 372), and Air Canada (C$ 402) offers the cheapest pricing from London, Ontario to San Francisco. WestJet is 50% 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

Novato

Burlingame

Redwood City

South San Francisco

San Bruno

Scotts Valley

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
Air Canada	CheapestC$ 400	AverageC$ 647	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
WestJet	CheapestC$ 449	AverageC$ 587	FlexibilityNo cancel fee	On-time60%	Search WestJet 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$ 214

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 16/4. 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

One-way 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 March 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 March 2025.

Find flights from London to San Francisco within your budget

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.

Travel insights for flights from London to San Francisco

Get recent, data-driven insights about flights from London to San Francisco including ideal travel times, pricing trends, and more.

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 March 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 March 2025.