YXU - SFO

C$ 220 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 29/1. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
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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Everything you should know

Cheapest round-trip
C$ 376
Air Canada
Thu 29/1Mon 2/2
YXU - SFO • 2 stops
Cheapest one-way flights
C$ 220
Typical prices: C$ 327-C$ 448
Air Canada
Thu 29/1
YXU - SFO • 1 stop
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to San Francisco

Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 3:35 p.m.
YXU
-
SFO
13h 25m2 stops
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 376Air Canada
Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 3:35 p.m.
YXU
-
SFO
13h 25m2 stops
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 379Air Canada
Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 382Air Canada
Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 383Air Canada
Tue, 20 Jan - Wed, 4 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 397Air Canada
Wed, 21 Jan - Thu, 5 Feb
Air Canada Logo
5:10 a.m. - 3:35 p.m.
YXU
-
SFO
13h 25m2 stops
Air Canada Logo
7:30 a.m. - 9:21 p.m.
SFO
-
YXU
10h 51m2 stops
C$ 404Air Canada
Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
8:30 a.m. - 9:20 p.m.
SFO
-
YXU
9h 50m1 stop
C$ 420Air Canada
Thu, 29 Jan - Mon, 2 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
8:30 a.m. - 9:20 p.m.
SFO
-
YXU
9h 50m1 stop
C$ 422Air Canada
Tue, 20 Jan - Thu, 5 Feb
Air Canada Logo
5:10 a.m. - 10:54 a.m.
YXU
-
SFO
8h 44m1 stop
Air Canada Logo
8:30 a.m. - 9:21 p.m.
SFO
-
YXU
9h 51m1 stop
C$ 423Air Canada
Sat, 24 Jan - Sat, 24 Jan
Air Canada Logo
5:10 a.m. - 3:55 p.m.
YXU
-
SFO
13h 45m2 stops
Air Canada Logo
6:00 p.m. - 8:46 a.m.
SFO
-
YXU
11h 46m2 stops
C$ 430Air Canada
Booking Insights

KAYAK's insights & trends for London to San Francisco flights

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.

Which airlines fly direct between London and San Francisco?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from London to San Francisco.

There are 2 airlines that fly direc from London to San Francisco. They are Air Canada and WestJet. The cheapest airline for this route is WestJet, with the best round-trip deal found costing C$ 241. On average, the best prices for this route can be found at WestJet.

Good to know

Low seasonAugust
Cheapest flightC$ 220
Best time to beat the crowds (53% less expensive on average)
Most popular time to fly and prices are also 33% 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$ 220 for a one-way ticket and C$ 375 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$ 421 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$ 604 and an overall rating of 7.1.

  • 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.

Reviews of the 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 3235 reviews
7.4Boarding
6.2Food
6.1Entertainment
7.9Crew
7.0Comfort
Airline reviews

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

6.0 GoodRachel, Jan 2026
SEA - SFO
Read more WestJet reviews

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

My luggage was damaged 1 wheel was out I can't find it nowhere

Took 3 hours to check in and drop off our suitcases. Half of the passengers were still in line by boarding time. The computer systems and staff were very slow. Staff were also disorganized and kept allowing later flights to skip lines. Suitcases were piling on that several other passengers didn't get their suitcases. Then, we were sitting in the plane for 2 hours and were told that the flight was overbooked. We missed our connecting flight and had to fly the following day but with a stop over. Good thing ONE WestJet customer rep was pleasant and actually knew how to do her job when we wanted to rebook to a direct flight. Thank you to Kim at Toronto airport. Terrible experience at PUJ. Won't go back to Dominican Republic.

Loading was delayed multiple times, due to what seemed like boarding pass check system failures, or poor process. Additional delays due to plane congestion on the airport tarmac. All was made up by comfortable seating, good food and good in-flight entertainment.

Great seats, super comfortable, but no in flight entertainment which was a let down

Airplane is too small. Crew, especially the flight attendant who looked after our area, was not at all friendly and a touch authoratative. She may have been the most gruff flight attendant i've come across in 40 years of business travel

I when to Jamaica for my dad funeral and I did not get my luggage from westjet . I add to buy clothes putting me financial debt i did no want to be in Westjet did not call me to apologize are to inquire about my luggage I am still angry about it

Ground staff was not helpful, but staff at the business counter were excellent.

I selected "carry-on" for a round trip on Kayak, but my return flight on WestJet did not include a carry-on and they would not allow me to add one. My only option was to add a "checked bag" which I had to wait for on the luggage carousel after landing. Not a good experience.

The staff was great and made the long trip easy peasy!

The free Wi-fi for Aeroplan members was a great touch. The time passed quickly. I found the seats seemed a little closer together than I remember. Not Air Canada's fault, but we were about 20 minutes late landing because the airport was too busy. We had to circle around for a while. The boarding and disembarking went very smoothly.

Too many delays. Seats too small. A budget airline. Will never fly Air Canada again.

I liked the behaviour of the crew members.The flight was good.

Horrible, we were on a little DeHaviland 400 that was really small and shaky. I am 5' 4" and I had to duck my head to get in it felt like an old war plane.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

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.

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

Information on your arrival and departure airports