YXU - BOS

C$ 321 Find Cheap Flights from London to Boston

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Boston departing on 13/9. 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 Boston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Boston, 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 London to Boston, as well as popular online travel agencies
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Flights Deals

Cheap Flights from London to Boston (YXU-BOS)

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

Sun, 14 Sep - Fri, 19 Sep
WestJet Logo
6:00 a.m. - 5:40 p.m.YXU-BOS
11h 40m1 stop
WestJet Logo
6:30 p.m. - 5:12 a.m.BOS-YXU
10h 42m1 stop
C$ 679WestJet
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Sun, 14 Sep - Fri, 19 Sep
Air Canada Logo
6:10 a.m. - 9:55 a.m.YXU-BOS
3h 45m1 stop
Air Canada Logo
6:00 a.m. - 3:17 p.m.BOS-YXU
9h 17m2 stops
C$ 724Air Canada
Find Deal
Wed, 27 Aug - Wed, 3 Sep
Air Canada Logo
9:55 a.m. - 6:00 p.m.YXU-BOS
8h 05m2 stops
Air Canada Logo
4:45 p.m. - 9:27 p.m.BOS-YXU
4h 42m1 stop
C$ 757Air Canada
Find Deal
Tue, 19 Aug - Fri, 22 Aug
Air Canada Logo
6:25 a.m. - 11:28 a.m.YXU-BOS
5h 03m1 stop
Air Canada Logo
4:35 p.m. - 9:27 p.m.BOS-YXU
4h 52m1 stop
C$ 772Air Canada
Find Deal
Tue, 19 Aug - Fri, 22 Aug
Air Canada Logo
6:25 a.m. - 2:35 p.m.YXU-BOS
8h 10m2 stops
Air Canada Logo
4:35 p.m. - 9:27 p.m.BOS-YXU
4h 52m1 stop
C$ 779Air Canada
Find Deal
Tue, 19 Aug - Fri, 22 Aug
Air Canada Logo
9:55 a.m. - 6:00 p.m.YXU-BOS
8h 05m2 stops
Air Canada Logo
5:50 a.m. - 3:02 p.m.BOS-YXU
9h 12m2 stops
C$ 786Air Canada
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Sun, 14 Sep - Fri, 19 Sep
 Logo
6:10 a.m. - 4:18 p.m.YXU-BOS
10h 08m2 stops
 Logo
6:00 a.m. - 3:17 p.m.BOS-YXU
9h 17m2 stops
C$ 847
Find Deal
Wed, 27 Aug - Wed, 3 Sep
 Logo
8:00 p.m. - 2:41 p.m.YXU-BOS
18h 41m3 stops
 Logo
3:30 p.m. - 5:12 a.m.BOS-YXU
13h 42m2 stops
C$ 848
Find Deal
Wed, 27 Aug - Wed, 3 Sep
 Logo
8:00 p.m. - 2:41 p.m.YXU-BOS
18h 41m3 stops
 Logo
12:15 p.m. - 5:12 a.m.BOS-YXU
16h 57m3 stops
C$ 857
Find Deal
Tue, 19 Aug - Fri, 22 Aug
 Logo
8:00 p.m. - 9:31 p.m.YXU-BOS
25h 31m3 stops
 Logo
3:30 p.m. - 5:14 a.m.BOS-YXU
13h 44m2 stops
C$ 1,058
Find Deal
Booking Insights

KAYAK's insights & trends for London to Boston flights

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

How much is a round-trip flight from London, Ontario to Boston?

What is the cheapest month to fly from London to Boston?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Boston, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to Boston is July, where tickets cost C$ 461 (return) on average. On the other hand, the most expensive months are September and January, where the average cost of round-trip tickets is C$ 1,280 and C$ 1,224 respectively.


Good to know

Low seasonMarch
Cheapest flightC$ 321
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 12% lower on average.
Flight from London to Boston

When to book flights from London to Boston

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

  • What is the cheapest flight from London to Boston?

    In the last 3 days, the lowest price for a flight from London to Boston was C$ 233 for a one-way ticket and C$ 492 for a round-trip.

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

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

  • Which airline alliances offer flights from London to Boston?

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

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

    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 London to Boston.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston from London 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 London to Boston?

    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 Boston with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Boston?

    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 Boston from London 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 London to Boston

 
See real verified KAYAK customer reviews for airlines flying from London to Boston. 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 London to Boston? 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 9851 reviews
7.1Comfort
7.3Boarding
6.3Food
7.8Crew
6.8Entertainment
Airline reviews

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

2.0 MediocreAnonymous, Jul 2025YYZ - LGA
Read more Air Canada reviews

Flight got delayed for no reason. And Air Canada was doing 3 boardings via the same gate. It was chaotic!

My return flight experience was one of the worst times I have had traveling anywhere this year. Not because of the flight. It was because there was not enough time allocated to deplane, go through U.S. Customs and U.S. Security to get to the gate for the connecting flight to Boston which I missed, There was well less than an hour between my landing in Montreal from Prince Edward Island to my connecting gate. I even called Air Canada on the morning of my return and noted my concern over the short layover time, not more that 45 minutes. The initial flight was four minutes late. I was seated in the rear of the first aircraft, and it took at least 20 minutes to deplane. The U.S. Customs was a considerable distance from the gate at which we landed. The need for double security seemed unnecessary and redundant. The distance from the security to my gate was again fairly great, and the wrong gate number was listed on my boarding pass. The agent I approached at the flight that was going to Newark, New Jersey was too busy to answer my question as to what gate was for Boston. When I got to the right gate, they had just closed the door to the aircraft even though I arrived a minute late. If I knew the distance to Customs and from Security to the gate, I would have asked for a seat on the next available flight which was 4:30 pm. When I made my call at 6:00AM that morning. When I asked the agent at the Boston gate, he said that the 4:30 flight was already “OVERBOOKED!” I was put on an 8:30 PM flight and didn’t get home until MIDNIGHT. I then had to care for a barnful of hungry animals and didn’t get to bed until 2:00 AM.

Wonderful airline. All staff were pleasant and helpful. What is sad is that it wasn’t grand gestures just everyday pleasantness and friendliness that are missing from the other airlines I have flown recently.

Friendly efficient crew, but plane had no way to charge phone. That is a near necessity with today’s travel where we carry out travel documents on our phones.

Orlando to Canada, despite being close and an international flight, the plane was not at all comfortable. It felt like the chair was being pushed forward, in addition to not having a TV and having to choose from a tiny glass of drink, for example, water or soda. I couldn't have both. When I asked the flight attendant for an extra glass of water, she looked at me with an ugly face. This is ridiculous. They don't want to give water to passengers. I will never fly with this airline again in my life.

Horrible, we were on a little DeHaviland 400 that was really small and shaky. I am 5' 4" and I had to duck my head to get in it felt like an old war plane.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

This was an excellent experience for a very short flight.

No space in overhead bin, one cookie, 2 oz of juice - is not customer service.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

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

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