HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$314+ Cheap flights from Boston (BOS) to London, ON (YXU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — YXU
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boston to London

Cheapest flights from Boston to London
Explore the most affordable flight options available from Boston to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:55 am
BOS
-
YXU
2 stops24h 40m
Multiple Airlines
Wed 4/296:10 am
YXU
-
BOS
1 stop11h 30m
Multiple Airlines
Deal found 3/8$568
This oojo deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:30 pm
BOS
-
YXU
1 stop10h 50m
WestJet
Sun 5/246:10 am
YXU
-
BOS
1 stop11h 30m
WestJet
Deal found 3/9$600
This Air Canada deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:45 am
BOS
-
YXU
1 stop6h 19m
Air Canada
Fri 4/35:10 am
YXU
-
BOS
1 stop4h 46m
Air Canada
Deal found 3/5$607
This Mytrip deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2210:05 am
BOS
-
YXU
3 stops19h 15m
Multiple Airlines
Mon 5/255:55 pm
YXU
-
BOS
2 stops23h 40m
Multiple Airlines
Deal found 3/9$623
This Air Canada deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/110:35 am
BOS
-
YXU
2 stops6h 58m
Air Canada
Wed 6/35:40 am
YXU
-
BOS
2 stops9h 07m
Air Canada
Deal found 3/5$625
This Kiwi.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1810:05 am
BOS
-
YXU
2 stops27h 45m
Multiple Airlines
Sun 5/246:10 am
YXU
-
BOS
1 stop11h 30m
Multiple Airlines
Deal found 3/9$628
This Air Canada deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:30 am
BOS
-
YXU
2 stops11h 34m
Air Canada
Mon 4/275:10 am
YXU
-
BOS
1 stop4h 49m
Air Canada
Deal found 3/5$641

Find flight deals from Boston to London

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to London (YXU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$568
(Kiwi.com)
Provider with most accurate pricing for Boston Logan Intl-London flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-London flights.
Search Deals
From Boston Logan Intl to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 10, 2026.
Use the filters below to find and compare flights from Boston to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Wed 4/22

5:55 am-6:35 am

2 stops24h 40m

London

Wed 4/29

6:10 am-5:40 pm

1 stop11h 30m

$568

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Mon 4/20

10:45 am-5:04 pm

1 stop6h 19m

London

Mon 4/27

5:10 am-9:59 am

1 stop4h 49m

$607

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Mon 6/1

5:50 am-2:58 pm

2 stops9h 08m

London

Wed 6/3

5:40 am-11:46 am

1 stop6h 06m

$616

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Fri 5/22

10:05 am-5:20 am

3 stops19h 15m

London

Mon 5/25

5:55 pm-5:35 pm

2 stops23h 40m

$623

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Sat 7/18

5:45 am-3:00 pm

2 stops9h 15m

London

Sat 7/25

9:30 am-6:07 pm

2 stops8h 37m

$625

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Wed 4/1

5:30 am-5:04 pm

2 stops11h 34m

London

Fri 4/3

5:10 am-2:52 pm

2 stops9h 42m

$649
Quickest round-trip

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Wed 4/22

1:00 pm-5:04 pm

1 stop4h 04m

London

Wed 4/29

5:40 pm-10:39 pm

1 stop4h 59m

$661
Cheapest one-way
Quickest one-way

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Wed 7/15

12:30 pm-5:35 pm

1 stop5h 05m

$314

BostonLondon

BOS - YXU

BOSYXU

Boston Logan Intl

Wed 7/15

7:10 am-5:20 am

3 stops22h 10m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/10

Sorted by cheapest first

Compare providers for flights from Boston to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to London in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-London, Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-London, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-London, Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-London, Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-London, Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to London

Have a flexible travel schedule? Discover the best time to fly to London from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Boston to London, Ontario?

Currently, April is the cheapest month in which you can book a flight from Boston to London, Ontario (average of $118). Flying from Boston to London, Ontario in December is currently the most expensive (average of $260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated March 10, 2026.
Peruse reviews from past customers who have flown with Air Canada from Boston to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,800 reviews

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Air Canada
7.1
Good
10,800 reviews
Air Canada
7.1
Good
10,800 reviews

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.

Related info for your journey

Find useful and relevant information for your journey from Boston to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to London, Ontario?

    Air Canada can get you from Boston to London, Ontario in just under 6h 19m. Your travel time can differ by up to . Boston and London, Ontario are separated by a distance of 516 mi.

  • What is the cheapest airline to fly from Boston to London, Ontario round-trip?

    According to our current data, Air Canada ($254), offers the cheapest pricing from Boston to London, Ontario.

  • Can I find deals for flights from Boston to London that include hotel bookings?

    Yes. In addition to deals on Boston to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to London.

  • Can I find deals for business class flights from Boston to London?

    Yes. Cheapflights offers flight deals from Boston to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to London, Ontario?

    Currently, April is the cheapest month in which you can book a flight from Boston to London, Ontario (average of $118). Flying from Boston to London, Ontario in December is currently the most expensive (average of $260). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Boston to London

Discover the top airline that operate flights from Boston to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$254Average$720FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.