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SFO - YXU

Find cheap flights from San Francisco to London from $621

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to London departing on 6/3. 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.
1 adult
0 bags
Mon 6/3
Mon 6/10

Search 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
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
10:54 pm - 9:16 amSFO-YXU
7h 22m1 stop
3:25 pm - 8:07 pmYXU-SFO
7h 42m1 stop
$621Air Canada
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Mon, Jun 3 - Fri, Jun 7
10:05 pm - 9:16 amSFO-YXU
8h 11m1 stop
3:25 pm - 9:02 pmYXU-SFO
8h 37m1 stop
$622Air Canada
Find Deal
Mon, Jun 3 - Fri, Jun 7
10:54 pm - 9:16 amSFO-YXU
7h 22m1 stop
9:50 am - 6:40 pmYXU-SFO
11h 50m2 stops
$626Air Canada
Find Deal
Mon, Jun 3 - Fri, Jun 7
7:25 pm - 9:16 amSFO-YXU
10h 51m2 stops
9:50 am - 3:32 pmYXU-SFO
8h 42m1 stop
$627Air Canada
Find Deal
Mon, Jun 3 - Fri, Jun 7
7:25 pm - 9:16 amSFO-YXU
10h 51m2 stops
9:50 am - 6:40 pmYXU-SFO
11h 50m2 stops
$631Air Canada
Find Deal
Mon, Jun 3 - Fri, Jun 7
7:25 pm - 9:16 amSFO-YXU
10h 51m2 stops
6:00 am - 2:43 pmYXU-SFO
11h 43m2 stops
$632Air Canada
Find Deal
Mon, Jun 3 - Fri, Jun 7
3:20 pm - 7:13 pmSFO-YXU
24h 53m2 stops
6:15 am - 2:34 pmYXU-SFO
11h 19m2 stops
$796WestJet
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Tue, May 14 - Tue, May 28
3:20 pm - 7:13 pmSFO-YXU
24h 53m2 stops
8:00 pm - 9:13 pmYXU-SFO
28h 13m1 stop
$824WestJet
Find Deal
Tue, May 14 - Tue, May 28
12:50 pm - 7:13 pmSFO-YXU
27h 23m1 stop
6:15 am - 12:02 pmYXU-SFO
8h 47m1 stop
$1,655WestJet
Find Deal
Tue, May 14 - Tue, May 28

Flights from San Francisco to London - Travel Insights & Trends

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.

What’s the cheapest day of the week to fly from San Francisco to London?

The average price of all flights from San Francisco to London, Ontario clicked on KAYAK for each day over the last 12 months.
For San Francisco to London, Monday is the cheapest day to fly on average and Saturday is the most expensive. Flying from London back to San Francisco, the best deals are generally found on Saturday, with Friday being the most expensive.

Good to know

High season

July

Cheapest flight

$621
Most popular time to fly with an average 24% 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, Ontario?

    In the last 3 days, the lowest price for a flight from San Francisco to London, Ontario was $621 for a round-trip ticket.

  • 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.

  • 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.

See more FAQs

Top airline flying 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.
7.0
Air CanadaOverall score based on 6904 reviews
7.2Boarding
7.8Crew
6.2Food
7.0Comfort
6.8Entertainment
Airline reviews

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

4.0 OkayAnonymous, May 2024CLT - YYZ
Read more about Air Canada reviews

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I had written all my complaints on my trip from Grand Junction to Denver so I will repeat it here! I was absolutely appalled that I had to pay for a regular seat that I choose 24 hrs before boarding! Also I checked my large bag which I had to pay for as well, and by the time I boarded all the room in the bins were gone so also had to check that one. I noticed people pulling out oversized suitcases, bigger than the measurements stated for carry on, and also large pack packs stuffed full! So these people were taking up 2 or 3 spaces that the rest of us should have been able to use but couldn’t! NoTV on the flight! Thankfully I had downloaded the United Airlines app and was able to watch movies on my phone. Don’t remember the last time I flew in a plane with no movie screens!

The crew was friendly, the seats are too small. Air travel is barely tolerable anymore.

Food was icecold or frozen including breakfast. Hopeless service. Rude crew.

The flight was very uncomfortable and there was no snacks served for the 13 hours international flight. In addition, the flight was delayed 3 hours

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

Cabin crew were great. Seats are criminal for tall people

My flight was great! Gate attendants and crew were great… pleasant and in good spirits. Flight delayed several hours and we were well informed of the status while on plane. Thank you!

The fact that I got to Toronto alive and well and safe is a huge plus. I thank the captain and crew for a safe flight The comfort of the aircraft leaves much to be desired. Human beings should not have to be that cramped and squashed on a flight that we pay a lot for and even have to pay for lousy food choices The cabin crew were pleasant and helpful Kudos to them as the flight was packed to capacity and there was a lot of work for them in a short space of time All in all a good experience, but too cramped

San Francisco - London Flights

Departure:

San Francisco (SFO)United States

Destination:

London (YXU)Canada

Return flight deals:

London - San Francisco

Cabin classes: