BOS - YXU

$550 Find Cheap Flights from Boston to London

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to London departing on 10/8. 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 Boston 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 Boston to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Boston to London (BOS-YXU)

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

Wed, Oct 8 - Wed, Oct 15
 Logo
6:20 am - 5:12 amBOS-YXU
22h 52m2 stops
 Logo
8:00 pm - 11:59 pmYXU-BOS
27h 59m3 stops
Wed, Oct 8 - Wed, Oct 15
 Logo
6:11 am - 5:12 amBOS-YXU
23h 01m3 stops
 Logo
8:00 pm - 11:59 pmYXU-BOS
27h 59m3 stops
Wed, Oct 8 - Wed, Oct 15
 Logo
6:20 am - 5:12 amBOS-YXU
22h 52m2 stops
 Logo
8:00 pm - 6:28 pmYXU-BOS
22h 28m2 stops
Fri, Sep 26 - Sun, Sep 28
Air Canada Logo
6:00 am - 3:17 pmBOS-YXU
9h 17m2 stops
Air Canada Logo
10:00 am - 3:59 pmYXU-BOS
5h 59m1 stop
$652Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 15
Air Canada Logo
10:40 am - 3:02 pmBOS-YXU
4h 22m1 stop
Air Canada Logo
9:55 am - 3:59 pmYXU-BOS
6h 04m1 stop
$665Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 15
Air Canada Logo
10:20 am - 9:27 pmBOS-YXU
11h 07m2 stops
Air Canada Logo
6:15 am - 11:29 amYXU-BOS
5h 14m1 stop
$670Air Canada
Find Deal
Fri, Sep 26 - Sun, Sep 28
Air Canada Logo
6:00 am - 3:17 pmBOS-YXU
9h 17m2 stops
Air Canada Logo
6:10 am - 2:30 pmYXU-BOS
8h 20m2 stops
$685Air Canada
Find Deal
Fri, Oct 10 - Fri, Oct 17
United Airlines Logo
10:40 am - 3:02 pmBOS-YXU
4h 22m1 stop
United Airlines Logo
6:15 am - 11:29 amYXU-BOS
5h 14m1 stop
$783United Airlines
Find Deal
Fri, Oct 10 - Fri, Oct 17
United Airlines Logo
4:45 pm - 9:27 pmBOS-YXU
4h 42m1 stop
United Airlines Logo
9:55 am - 11:59 pmYXU-BOS
14h 04m2 stops
$798United Airlines
Find Deal
Fri, Oct 10 - Fri, Oct 17
United Airlines Logo
8:00 am - 3:02 pmBOS-YXU
7h 02m2 stops
United Airlines Logo
3:40 pm - 12:50 amYXU-BOS
9h 10m2 stops
$963United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Boston to London flights

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

Which airlines provide the cheapest flights from Boston 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 Boston to London were found on Air Canada ($652) and United Airlines ($783).

Good to know

Cheapest flight$550
Flight from Boston to London

When to book flights from Boston to London

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

  • What is the cheapest flight from Boston to London?

    In the last 3 days, the lowest price for a flight from Boston to London was $550 for a round-trip ticket.

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

    Yes

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

    When flying out of Boston you will be using Boston Logan Intl. You will be landing at London, also known as London.

  • Which aircraft models fly most regularly from Boston to London?

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

  • Which airline alliances offer flights from Boston to London?

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

  • How does KAYAK find such low prices on flights from Boston 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 Boston to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Boston 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 Boston 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 Boston with another airline. Booking your flights between Boston 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 Boston 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 Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Boston to London

 
See real verified KAYAK customer reviews for airlines flying from Boston 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 Boston 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.
7.1
Air CanadaOverall score based on 10000 reviews
7.0Comfort
7.3Boarding
6.3Food
7.8Crew
6.8Entertainment
Airline reviews

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

2.0 MediocreKyle, Aug 2025MCI - YYZ
Read more Air Canada reviews

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Check in staff was incredibly rude and condescending. When I arrived at the gate I had been charged $125 for a checked back. I did have or check a bag. When I brought this to the attention of the staff member who checked me in, she said that she made a mistake and there was nothing she could do about it. I asked her to remove the charge and refund credit card, she said she could not and that I had to call my credit card company to contest the charge. I called Air Canada customer support, was put on hold, after 43 minutes a received a messages stating customer service was overwhelmed with calls and was then hung up on.

Refreshments and Air Hostess was good. Issues with customs in Toronto caused flight to depart and left me behind twice. Vouchers for delayed flight needs to increase.

Long wait to check in at the priority counter in Toronto

I had no communication, receipt etc from Air Canada until hours before flight

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I had a good experience. I liked being informed about the status of my luggage

Everything you need to know for your flight from Boston to London

Information on your arrival and departure airports

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