SFO - YXU

$193 Find Cheap Flights from San Francisco to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to London departing on 9/2. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to London, 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 San Francisco to London, as well as popular online travel agencies
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Flight Deals
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Flight Deals

Cheap Flights from San Francisco to London (SFO-YXU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to London 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 San Francisco to London

Mon, Sep 8 - Tue, Sep 16
 Logo
10:15 am - 5:12 amSFO-YXU
15h 57m2 stops
 Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
Mon, Sep 8 - Tue, Sep 16
 Logo
10:15 am - 5:12 amSFO-YXU
15h 57m2 stops
 Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
2:45 pm - 5:12 amSFO-YXU
11h 27m2 stops
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$340WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
2:45 pm - 5:12 amSFO-YXU
11h 27m2 stops
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$346WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
12:50 pm - 5:12 amSFO-YXU
13h 22m1 stop
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$353WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
12:50 pm - 5:12 amSFO-YXU
13h 22m1 stop
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$354WestJet
Find Deal
Mon, Sep 8 - Tue, Sep 16
WestJet Logo
7:30 am - 5:12 amSFO-YXU
18h 42m1 stop
WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
$355WestJet
Find Deal
Sun, Sep 7 - Tue, Sep 16
United Airlines Logo
12:43 am - 9:29 pmSFO-YXU
17h 46m2 stops
United Airlines Logo
3:50 pm - 9:32 pmYXU-SFO
8h 42m1 stop
$591United Airlines
Find Deal
Sun, Sep 7 - Tue, Sep 16
United Airlines Logo
12:43 am - 9:29 pmSFO-YXU
17h 46m2 stops
United Airlines Logo
10:00 am - 5:07 pmYXU-SFO
10h 07m2 stops
$606United Airlines
Find Deal
Thu, Aug 28 - Mon, Sep 1
Flair Airlines Logo
10:15 am - 9:00 pmSFO-YXU
31h 45m1 stop
Flair Airlines Logo
9:45 pm - 9:30 amYXU-SFO
14h 45m1 stop
$810Flair Airlines
Find Deal
Booking Insights

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

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

Which airlines provide the cheapest flights from San Francisco to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Francisco to London were found on WestJet ($340) and United Airlines ($591).

Good to know

Low seasonMarch
Cheapest flight$193
Best time to beat the crowds with an average 66% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from San Francisco to London

When to book flights from San Francisco to London

Are your dates flexible? Find out the best times to travel from San Francisco to London 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 San Francisco to London

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

    In the last 3 days, the lowest price for a flight from San Francisco to London was $193 for a one-way ticket and $321 for a round-trip.

  • Do I need a passport to fly between San Francisco and London?

    Yes, you'll most likely have to show a valid passport before boarding the plane in San Francisco and on arrival in London.

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

    On your way to London, you’ll fly out from San Francisco. You’ll be landing at London.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Francisco to London are United Airlines and WestJet. With an average price for the route of $424 and an overall rating of 7.4, United Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of $491 and an overall rating of 7.2.

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

    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 San Francisco to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from San Francisco 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 San Francisco to London?

    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 London with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and YXU can sometimes prove cheaper using this method.

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

    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 London from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from San Francisco to London

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to London. 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 San Francisco to London? 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.
7.4
United AirlinesOverall score based on 8915 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

10.0 ExcellentWendy, Aug 2025SFO - YYC
Read more United Airlines reviews

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

Smooth flight Staff were courteous and welcoming upon entering and exiting the plane Pilot and crew provided frequent updates Leg space was not pleasant but manageable

Everything was good except I was a bit disappointed that I had to pay US $150 for bags.

They cancelled and moved my flight with no email or text or any other notice. I discovered this only when I attempted to check in for my flight. Actual flying experience was above average.

Flight itself good .Landing at terminal3 and connections to terminal1,it is connections nightmare,specially for disable person

The seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

The flight attendants were super! They created a cosy and warm flight atmosphere!

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic! No entertainment possibilities. Not even a plug-in for phone or IPad if you wanted to watch a downloaded movie. Back to flying Air Canada!

It was good, flight was on time, boarding was smooth and done in zones, food was good too but there was no form of entertainment. Luggage’s were intact. So an overall good flight

Plane changed to one with no entertainment system or ability to serve hot meals

No paper towels in bathroom. Aisle seat difficult to get out of Other than those, excellent service

Both flights are delayed so I rate the whole experience as mediocre.

Bad experience boarding and flight got delayed didn’t make it to my next flight

The food on the trip Toronto to Athens could be better: the chicken didn’t taste good.

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

No Charging ports for personal electronics, which were required to use wifi entertainment.

They are a great airline, and i enjoying flying with them. However my experience with booking through Kayak was a horrible experience. With all the restrictions and glitches of website. My entire bookings by kayak was wrong. And there was no possible way of fixing anything with them, because they hand over responsibility to the airline after purchase is made. Will not be booking through Kayak again and will inform my family and friends not to as well.

I liked nothing about this flight nor the incredible lack of service and communication on this flight from the Captain to every staff member. Arrogant, entitled and lacking any kind of basic customer service

I booked my flight ni November and was placed on standby? How does this happen. Flight was 1 1/2 hours late departure plane was switched to a smaller plane easy to tell this is a government run company they don’t care about anyone

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

Information on your arrival and departure airports

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