BOS - YXU

$350 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 12/19. 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
$678
Air Canada
Fri 2/13Sat 2/21
BOS - YXU • 2 stops
Cheapest one-way
$350
Air Canada
Fri 12/19
BOS - YXU • 1 stop
Top airlines
Air Canada
Cheapest • from $678 (round-trip)
Air Canada
Best reviews • 7.1 score
Airline reviews
Airline reviews
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+1
Airline reviews
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Booking Insights
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, Feb 13 - Sat, Feb 21
Air Canada Logo
10:15 am - 5:05 pmBOS-YXU
6h 50m2 stops
Air Canada Logo
5:40 pm - 10:37 pmYXU-BOS
4h 57m1 stop
$678Air Canada
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Thu, Mar 26 - Sun, Mar 29
Air Canada Logo
10:45 am - 5:05 pmBOS-YXU
6h 20m1 stop
Air Canada Logo
5:40 pm - 10:38 pmYXU-BOS
4h 58m1 stop
$697Air Canada
Find Deal
Thu, Mar 26 - Sun, Mar 29
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
$702Air Canada
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Thu, Mar 26 - Sun, Mar 29
Air Canada Logo
10:15 am - 5:05 pmBOS-YXU
6h 50m2 stops
Air Canada Logo
9:25 am - 7:12 pmYXU-BOS
9h 47m2 stops
$707Air Canada
Find Deal
Sat, Dec 20 - Sat, Dec 27
Air Canada Logo
6:15 am - 5:05 pmBOS-YXU
10h 50m1 stop
Air Canada Logo
5:10 am - 9:57 amYXU-BOS
4h 47m1 stop
$720Air Canada
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Mon, Dec 8 - Fri, Dec 12
Multiple Airlines Logo
11:08 am - 7:12 pmBOS-YXU
32h 04m3 stops
Multiple Airlines Logo
7:30 am - 6:11 pmYXU-BOS
34h 41m3 stops
$788Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
United Airlines Logo
9:30 am - 8:46 amBOS-YXU
23h 16m2 stops
United Airlines Logo
9:25 am - 3:57 pmYXU-BOS
6h 32m1 stop
$937United Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
United Airlines Logo
1:00 pm - 5:05 pmBOS-YXU
4h 05m1 stop
United Airlines Logo
9:25 am - 3:57 pmYXU-BOS
6h 32m1 stop
$954United Airlines
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Sat, Dec 20 - Sat, Dec 27
Multiple Airlines Logo
7:00 pm - 6:34 amBOS-YXU
35h 34m3 stops
Multiple Airlines Logo
5:05 pm - 7:40 pmYXU-BOS
26h 35m2 stops
$2,360Multiple Airlines
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Mon, Dec 8 - Fri, Dec 12
WestJet Logo
7:00 pm - 7:12 pmBOS-YXU
24h 12m3 stops
WestJet Logo
7:30 am - 11:41 pmYXU-BOS
16h 11m2 stops
$2,513WestJet
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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 ($678) and United Airlines ($937).

Which airlines fly non-stop between Boston and London?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Boston to London.

There is just one airline that flies from Boston to London direct and that is Air Canada. The best round-trip deal found from Air Canada for the route is $478.

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Good to know

Cheapest flight$350
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 $350 for a one-way ticket and $678 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 10416 reviews
6.8Entertainment
7.3Boarding
7.8Crew
6.3Food
7.1Comfort
Airline reviews

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

10.0 ExcellentAli, Nov 2025DCA - YYZ
Read more Air Canada reviews

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

Almost everything it was a “cool” ambiance but we arrived to Toronto so that it’s ok for me

The crew was really nice. The plane seats were kinda small even for a 5’6” / 158 lbs person.

Check in agent was very helpful and polite. He helped me board the earlier flight back home instead of waiting 2 hours at the airport for the next flight

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

Information on your arrival and departure airports

Boston (BOS)
London (YXU)