YXU - SFO

C$ 205 Find Cheap Flights from London to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to San Francisco departing on 31/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to San Francisco, as well as popular online travel agencies
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Cheap Flight Deals from London to San Francisco (YXU-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from London to San Francisco

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from London to San Francisco.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
3:25 p.m. - 9:49 p.m.YXU-SFO
9h 24m1 stop
10:52 p.m. - 9:13 a.m.SFO-YXU
7h 21m1 stop
C$ 378Air Canada
Find Deal
Sat, 5 Apr - Sat, 12 Apr
3:25 p.m. - 9:49 p.m.YXU-SFO
9h 24m1 stop
11:20 p.m. - 2:48 p.m.SFO-YXU
12h 28m2 stops
C$ 384Air Canada
Find Deal
Sat, 5 Apr - Sat, 12 Apr
3:25 p.m. - 9:49 p.m.YXU-SFO
9h 24m1 stop
12:08 a.m. - 2:48 p.m.SFO-YXU
11h 40m2 stops
C$ 388Air Canada
Find Deal
Sat, 5 Apr - Fri, 11 Apr
3:25 p.m. - 9:49 p.m.YXU-SFO
9h 24m1 stop
12:08 a.m. - 8:18 p.m.SFO-YXU
17h 10m2 stops
C$ 401United Airlines
Find Deal
Fri, 4 Apr - Fri, 18 Apr
9:55 a.m. - 6:34 p.m.YXU-SFO
11h 39m2 stops
12:43 a.m. - 8:18 p.m.SFO-YXU
16h 35m2 stops
C$ 408United Airlines
Find Deal
Fri, 4 Apr - Fri, 18 Apr
9:55 a.m. - 7:05 a.m.YXU-SFO
24h 10m2 stops
9:01 p.m. - 2:48 p.m.SFO-YXU
14h 47m2 stops
C$ 421Air Canada
Find Deal
Sat, 5 Apr - Sat, 12 Apr
6:00 a.m. - 1:59 p.m.YXU-SFO
10h 59m2 stops
2:45 p.m. - 5:14 a.m.SFO-YXU
11h 29m2 stops
C$ 443WestJet
Find Deal
Thu, 14 Aug - Mon, 18 Aug
5:15 a.m. - 7:42 a.m.YXU-SFO
29h 27m3 stops
10:15 a.m. - 7:13 p.m.SFO-YXU
29h 58m2 stops
C$ 781
Find Deal
Sat, 5 Apr - Sat, 12 Apr
8:00 p.m. - 5:52 p.m.YXU-SFO
24h 52m2 stops
4:04 p.m. - 7:13 p.m.SFO-YXU
24h 09m2 stops
C$ 935WestJet
Find Deal
Fri, 4 Apr - Mon, 21 Apr
5:15 a.m. - 7:42 a.m.YXU-SFO
29h 27m3 stops
2:55 p.m. - 9:13 a.m.SFO-YXU
15h 18m3 stops
C$ 1,060
Find Deal
Sat, 5 Apr - Sat, 12 Apr

Flights from London to San Francisco - Travel Insights & Trends

Get data-powered insights and trends into flights from London to San Francisco to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from London to San Francisco is March, where tickets cost C$ 607 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is C$ 1,119 and C$ 925 respectively.

Good to know

Low season

October

High season

July

Cheapest flight

C$ 205
Best time to beat the crowds (2% less expensive on average)
Most popular time to fly and prices are also 12% lower on average.
Flight from London to San Francisco

When to book flights from London to San Francisco

Are your dates flexible? Find out the best times to travel from London to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to San Francisco

  • What is the cheapest flight from London to San Francisco?

    In the last 3 days, the lowest price for a flight from London to San Francisco was C$ 144 for a one-way ticket and C$ 266 for a round-trip.

  • Which airports will I be using when flying from London to San Francisco?

    London airport is called London and the only airport in San Francisco is San Francisco.

  • Which aircraft models fly most regularly from London to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to San Francisco?

    Star Alliance is the only airline alliance operating flights between London and San Francisco.

  • Which is the best airline for flights from London to San Francisco, WestJet or Air Canada?

    The two airlines most popular with KAYAK users for flights from London to San Francisco are WestJet and Air Canada. With an average price for the route of C$ 576 and an overall rating of 7.2, WestJet is the most popular choice. Air Canada is also a great choice for the route, with an average price of C$ 635 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from London to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from London to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from London to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
WestJetOverall score based on 2801 reviews
7.1Comfort
6.2Food
6.1Entertainment
7.9Crew
7.4Boarding
Airline reviews

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

2.0 MediocreAnonymous, Feb 2025YYZ - YYC
Read more WestJet reviews

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

Single flights to Cancun purchased through third-party, initially had issues printing luggage labels with the lady at the airport Pearson… Was super friendly and assisted quickly despite being very busy

Very old planes. Seats were not comfortable. Air was not on during the flight leading to incredibly stuffy conditions.

It was so bad experience they wanted just charged passengers for any reason.

Traveling on two legs the food was identical and not very good

The flight was on time and shorter time arrival than planned. I was an ultra basic passenger and understood one personal item on the plane. The announcements of one personal item and zone 9 boarding certainly felt like we were separated from the rest. Actually zone 9 passengers should be boarded second; we are not blocking aisles and can be seated much faster and deboarded faster too.

Terrible all around. Flight was late and airplane was very uncomfortable. The crew were unhelpful and hid in the back. Did zero work. No entertainment.

I booked and paid extra for exit door seats also pre paid for my luggage air Canada changed plains and I never got what I paid for and they made me pay for luggage again they also did this to my wife. They are the most unorganized company I have ever dealt with. I am sure I will never see the extra money I paid for the seats or the recharge for the luggage. They are subsidized by the taxpayers and don’t give a dam just a horrible way to do business

Your crew was so so so wonderful Only thing sound be great if you kept some phone chargers and converters rest 👌👌👌👌

The speakers were way too loud. Music was played during boarding too. This noise could've been avoided.

The TSA people or whatever you call them were a bit rude- I asked why I had to take my shoes off bc I'm 75 and in the USA, I don't have to. The man didn't need to snap at me. It wasn't even busy! The plane was ok, a bit small for such a long flight, but I'm very familiar with the 737 used ( I fly it often between SFO and SAN) service was ok-nothing special. If I drank alcohol I guess I would be happy with free choices. the plane was HOT and even the FA commented on it. They tried to get it cooler, but it never happened.

Multiple change of the gates at Pearson, delayed flight was extremely uncomfortable.

Easy boarding, punctuality, decent service. I can only complain about the measly snack.

Never made this leg of the flight since we rebooked through United instead. Did not make it to immigration/US custom due to the delay. Had to spend the night on our own dime in Toronto

Booked flight was cancelled. Was rebooked but sat in airport for several hours for new departure.

YYZ air Canada security messed up which led to my kids missing their flight and having to go on a separate flight later in the day without the rest of the family. Customer service was horrible and have no sense of urgency or compassion for their customers. They refuse to compensate for their errors and making my kids wait hours in the airport. This isn’t the first time we have had issues with this airline and I won’t be flying with them again.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Redwood City
Sunnyvale
South San Francisco
Palo Alto
Sonoma
Burlingame
Pacific Grove
Calistoga
Millbrae
Cupertino
Menlo Park
Healdsburg
Woodland
Big Sur
Yountville
Milpitas
San Bruno
Half Moon Bay
Manteca
Walnut Creek

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

Information on your arrival and departure airports

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