BOS - YXU

$237 Find Cheap Flights from Boston 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 Boston to London departing on 12/15. 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

Thu, Oct 30 - Thu, Nov 6
Air Canada Logo
10:45 am - 5:06 pmBOS-YXU
6h 21m1 stop
Air Canada Logo
5:40 pm - 10:37 pmYXU-BOS
4h 57m1 stop
$665Air Canada
Find Deal
Thu, Oct 30 - Thu, Nov 6
Air Canada Logo
10:45 am - 5:06 pmBOS-YXU
6h 21m1 stop
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$670Air Canada
Find Deal
Fri, Oct 31 - Fri, Nov 7
Air Canada Logo
10:45 am - 5:06 pmBOS-YXU
6h 21m1 stop
Air Canada Logo
9:25 am - 3:57 pmYXU-BOS
6h 32m1 stop
$675Air Canada
Find Deal
Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
12:49 pm - 7:12 pmBOS-YXU
30h 23m3 stops
Multiple Airlines Logo
8:10 pm - 6:10 pmYXU-BOS
22h 00m2 stops
$678Multiple Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
Air Canada Logo
4:35 pm - 9:21 pmBOS-YXU
4h 46m1 stop
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$681Air Canada
Find Deal
Wed, Nov 12 - Thu, Nov 13
Air Canada Logo
10:15 am - 9:21 pmBOS-YXU
11h 06m2 stops
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$686Air Canada
Find Deal
Thu, Oct 30 - Thu, Nov 6
Air Canada Logo
10:35 am - 9:21 pmBOS-YXU
10h 46m2 stops
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$699Air Canada
Find Deal
Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
8:24 pm - 8:12 pmBOS-YXU
47h 48m3 stops
Multiple Airlines Logo
8:10 pm - 6:10 pmYXU-BOS
22h 00m2 stops
$702Multiple Airlines
Find Deal
Fri, Oct 31 - Fri, Nov 7
Air Canada Logo
6:40 pm - 8:46 amBOS-YXU
14h 06m2 stops
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$710Air Canada
Find Deal
Thu, Oct 30 - Thu, Nov 6
Multiple Airlines Logo
12:49 pm - 7:12 pmBOS-YXU
30h 23m3 stops
Multiple Airlines Logo
8:10 pm - 10:05 pmYXU-BOS
25h 55m3 stops
$725Multiple Airlines
Find Deal

Everything you should know

Cheapest round-trip
$665
Air Canada
Thu 10/30Thu 11/6
BOS - YXU • 1 stop
Cheapest one-way
$237
Multiple Airlines
Mon 12/15
BOS - YXU • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to London!
Booking Insights

Good to know

Cheapest flight$237
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 $237 for a one-way ticket and $665 for a round-trip.

  • 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
7.1Comfort
6.8Entertainment
6.3Food
7.3Boarding
7.8Crew
Airline reviews

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

8.0 ExcellentJason, Sep 2025ORD - YYZ
Read more Air Canada reviews

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

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

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

Information on your arrival and departure airports

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