BOS - YXU

$561 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 5/15. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$561
WestJet
Fri 5/15Fri 5/22
BOS - YXU • 1 stop
Top airlines
Cheapest • from $561 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boston and London. You'll need at least 1 connection.
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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

Fri, May 15 - Fri, May 22
WestJet Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
WestJet Logo
5:55 pm - 5:40 pm
YXU
-
BOS
23h 45m
1 stop
$561WestJet
Fri, May 15 - Fri, May 22
Multiple Airlines Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
Multiple Airlines Logo
5:55 pm - 3:55 pm
YXU
-
BOS
22h 00m
2 stops
$596Multiple Airlines
Sun, Jul 19 - Sat, Jul 25
WestJet Logo
6:30 pm - 5:20 am
BOS
-
YXU
10h 50m
1 stop
WestJet Logo
5:55 pm - 5:40 pm
YXU
-
BOS
23h 45m
1 stop
$602WestJet
Sun, May 17 - Sun, May 24
Multiple Airlines Logo
6:35 pm - 1:50 pm
BOS
-
YXU
43h 15m
2 stops
Multiple Airlines Logo
6:10 am - 5:40 pm
YXU
-
BOS
11h 30m
1 stop
$635Multiple Airlines
Tue, Jun 9 - Thu, Jun 11
Air Canada Logo
10:45 am - 2:58 pm
BOS
-
YXU
4h 13m
1 stop
Air Canada Logo
9:30 am - 4:08 pm
YXU
-
BOS
6h 38m
1 stop
$643Air Canada
Sun, Jul 19 - Sat, Jul 25
Air Canada Logo
10:50 am - 2:55 pm
BOS
-
YXU
4h 05m
1 stop
Air Canada Logo
3:30 pm - 9:27 pm
YXU
-
BOS
5h 57m
2 stops
$651Air Canada
Tue, Jun 9 - Thu, Jun 11
Air Canada Logo
5:10 am - 11:43 am
BOS
-
YXU
6h 33m
1 stop
Air Canada Logo
5:10 am - 2:47 pm
YXU
-
BOS
9h 37m
2 stops
$652Air Canada
Tue, Jun 9 - Thu, Jun 11
Air Canada Logo
5:50 am - 2:58 pm
BOS
-
YXU
9h 08m
2 stops
Air Canada Logo
12:20 pm - 9:27 pm
YXU
-
BOS
9h 07m
2 stops
$660Air Canada
Sun, May 17 - Sun, May 24
Air Canada Logo
5:50 am - 5:33 pm
BOS
-
YXU
11h 43m
2 stops
Air Canada Logo
12:20 pm - 9:27 pm
YXU
-
BOS
9h 07m
2 stops
$684Air Canada
Fri, May 15 - Fri, May 22
Air Canada Logo
5:50 am - 5:33 pm
BOS
-
YXU
11h 43m
2 stops
Air Canada Logo
12:20 pm - 9:27 pm
YXU
-
BOS
9h 07m
2 stops
$685Air Canada
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 WestJet ($561) and Air Canada ($643).

Good to know

Cheapest flight$561
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 $561 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 10890 reviews
7.8Crew
7.3Boarding
7.1Comfort
6.8Entertainment
6.3Food
Airline reviews

I bought a ticket from Kayak. When I got to the airport, the was no ticket. I had to pay 5X to get to my destination. No response received from Kayak. I will NEVER use them again.

2.0 MediocreJustin, Apr 2026
BOS - YUL
Read more Air Canada reviews

I bought a ticket from Kayak. When I got to the airport, the was no ticket. I had to pay 5X to get to my destination. No response received from Kayak. I will NEVER use them again.

Good boarding but extremely cold temperature in both flights (60 F!).

Very rude gate attendants in San Francisco who didn’t let me bring my little carry on (smaller than usual size) and after boarding I realized that there still were a lot of overhead compartment space (like a full section available in some spots). That made me lose 30 minutes at my destination at 1am and it could have broken something fragile that I had in it

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Had to cancel the flight because there was a 14 hour layover before the flight. Unacceptable.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

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

Information on your arrival and departure airports