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Cheap flights from Boston to London Heathrow Airport from C$ 310

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to London Heathrow are usually found in October or January, booked 69 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Boston to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Heathrow
Explore the most affordable flight options available from Boston to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 March 2026.

Wed 16/96:00 a.m.
BOS
-
LHR
1 stop10h 35m
United Airlines
Thu 17/91:50 p.m.
LHR
-
BOS
1 stop11h 05m
United Airlines
Deal found 8/3C$ 671
Tue 15/95:00 p.m.
BOS
-
LHR
1 stop11h 35m
United Airlines
Thu 17/98:45 a.m.
LHR
-
BOS
1 stop11h 25m
United Airlines
Deal found 8/3C$ 676
Tue 5/59:40 p.m.
BOS
-
LHR
1 stop29h 15m
United Airlines
Fri 8/56:55 a.m.
LHR
-
BOS
1 stop15h 45m
United Airlines
Deal found 8/3C$ 694
Mon 27/49:40 p.m.
BOS
-
LHR
1 stop32h 40m
United Airlines
Thu 30/48:30 a.m.
LHR
-
BOS
1 stop14h 31m
United Airlines
Deal found 9/3C$ 706
Wed 22/49:40 p.m.
BOS
-
LHR
1 stop10h 20m
United Airlines
Fri 24/47:45 a.m.
LHR
-
BOS
1 stop11h 41m
United Airlines
Deal found 8/3C$ 709
Thu 9/48:50 p.m.
BOS
-
LHR
1 stop10h 05m
Icelandair
Thu 16/49:25 p.m.
LHR
-
BOS
1 stop29h 20m
Icelandair
Deal found 10/3C$ 714
Fri 8/511:00 p.m.
BOS
-
LHR
1 stop16h 20m
Icelandair
Sat 16/59:25 p.m.
LHR
-
BOS
1 stop29h 20m
Icelandair
Deal found 9/3C$ 726
Sat 9/511:00 p.m.
BOS
-
LHR
1 stop31h 55m
Icelandair
Fri 15/59:25 p.m.
LHR
-
BOS
1 stop26h 25m
Icelandair
Deal found 9/3C$ 729
Sun 5/49:30 p.m.
BOS
-
LHR
Nonstop6h 45m
KLM
Tue 7/46:30 a.m.
LHR
-
BOS
1 stop11h 43m
KLM
Deal found 8/3C$ 733
Mon 11/53:40 p.m.
BOS
-
LHR
1 stop13h 20m
United Airlines
Wed 13/58:40 a.m.
LHR
-
BOS
1 stop11h 30m
United Airlines
Deal found 11/3C$ 737
Wed 22/46:00 a.m.
BOS
-
LHR
1 stop9h 40m
United Airlines
Thu 23/41:50 p.m.
LHR
-
BOS
1 stop11h 05m
United Airlines
Deal found 9/3C$ 739
Tue 31/36:00 a.m.
BOS
-
LHR
1 stop9h 40m
United Airlines
Wed 1/41:50 p.m.
LHR
-
BOS
1 stop10h 45m
United Airlines
Deal found 10/3C$ 740

Find flight deals from Boston to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Heathrow (LHR). 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 13 March 2026.

Round-trip from

C$ 671

One-way from

C$ 310

Popular in

June

Cheapest in

October

Average price

C$ 838

Good round-trip deal

C$ 945 or less

Good one-way deal

C$ 437 or less
United Airlines
  • United Airlines
  • 22/4-23/4
  • 2 total stops
  • 21h 30m total
  • Boston to London
Search Deals
JetBlue
  • JetBlue
  • 5/8
  • Nonstop
  • 6h 51m total
  • Boston to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 207 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Heathrow 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 629,999 searches. Data last updated 13 March 2026.
Use the filters below to find and compare flights from Boston to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 26/4

9:30 p.m.-9:15 a.m.

Nonstop6h 45m

London Heathrow

Sun 10/5

6:30 a.m.-4:25 p.m.

1 stop14h 55m

C$ 846

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 27/4

7:00 p.m.-6:45 a.m.

Nonstop6h 45m

London Heathrow

Sun 3/5

6:30 a.m.-4:25 p.m.

1 stop14h 55m

C$ 846

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 4/5

7:00 p.m.-6:45 a.m.

Nonstop6h 45m

London Heathrow

Mon 11/5

6:30 a.m.-4:25 p.m.

1 stop14h 55m

C$ 846

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 1/4

7:00 p.m.-6:45 a.m.

Nonstop6h 45m

London Heathrow

Wed 8/4

6:15 a.m.-1:33 p.m.

1 stop12h 18m

C$ 846

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 21/8

7:10 p.m.-6:45 a.m.

Nonstop6h 35m

London Heathrow

Sat 29/8

6:15 a.m.-1:39 p.m.

1 stop12h 24m

C$ 846

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 17/8

9:30 p.m.-9:15 a.m.

Nonstop6h 45m

London Heathrow

Sat 22/8

4:50 p.m.-7:35 p.m.

Nonstop7h 45m

C$ 856
Quickest round-trip

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 26/4

8:10 p.m.-8:00 a.m.

Nonstop6h 50m

London Heathrow

Sun 10/5

11:00 a.m.-1:30 p.m.

Nonstop7h 30m

C$ 856

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 2/4

7:00 p.m.-6:45 a.m.

Nonstop6h 45m

London Heathrow

Mon 6/4

4:50 p.m.-7:35 p.m.

Nonstop7h 45m

C$ 856

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 26/4

8:10 p.m.-8:00 a.m.

Nonstop6h 50m

London Heathrow

Sun 3/5

11:00 a.m.-1:30 p.m.

Nonstop7h 30m

C$ 856

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 9/4

6:00 a.m.-8:10 p.m.

1 stop9h 10m

London Heathrow

Mon 13/4

9:40 a.m.-12:07 p.m.

Nonstop7h 27m

C$ 861

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Boston to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

How far ahead should I book a flight from Boston to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Heathrow. Price data was last updated on 6 March 2026.

To ensure you get the cheapest price possible for a flight from Boston to London Heathrow Airport, you should look to book at least 69 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boston to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Boston to London Heathrow Airport (average of C$ 592). Flying from Boston to London Heathrow Airport in June is currently the most expensive (average of C$ 805). 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.

What is the cheapest time of day to fly from BOS to LHR?

Find hourly flight availability from Boston to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to London Heathrow Airport as you normally would.

How much does it cost to fly round-trip from Boston to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 13 March 2026.
Read reviews from past customers who have flown British Airways from Boston to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,784 reviews
Check prices

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Crew

7.6

Food

6.4

Overall

6.7

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.
British Airways
6.7
Okay
7,784 reviews
British Airways
6.7
Okay
7,784 reviews
Check prices

Comfort

6.8

Boarding

6.9

Entertainment

6.4

Crew

7.6

Food

6.4

Overall

6.7

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.

Related info for your journey

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

  • What airport do you fly from for flights from Boston to London Heathrow?

    For a flight from Boston to London Heathrow, you will be flying from Logan Intl. Boston Logan Intl (BOS) is just 4.2 km from the centre of the city. Logan Intl is the only Boston airport and it handles 28 outbound flights to London Heathrow per day. 1 airline has flights to London Heathrow from Boston Logan Intl on a regular basis.

  • How long is the flight from Boston to London Heathrow Airport?

    United Airlines can get you from Boston to London Heathrow Airport in just under 10h 25m. Your travel time can differ by up to . Airlines will cover a distance of 5237 km.

  • What is the cheapest airline to fly from Boston to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Boston to London Heathrow Airport round-trip from C$ 597. This flight start at 28% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Boston to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Boston to London Heathrow Airport consider choosing Gulf Air (89%), Scandinavian Airlines (83%) or Malaysia Airlines (83%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Boston to London Heathrow Airport?

    Looking at all options, your cheapest flight can be booked for C$ 302. While the most popular route (Boston Logan Intl - London Heathrow) can be booked for C$ 595 on average, our data indicates C$ 849 when flying from Boston to London Heathrow Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Heathrow 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 Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from Boston to London Heathrow Airport (average of C$ 592). Flying from Boston to London Heathrow Airport in June is currently the most expensive (average of C$ 805). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Twickenham
Sutton
Gatwick
Slough
Marlow
Cobham
Leamington Spa
Romford
Watford
Bedford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow
Moreton-in-Marsh

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 Heathrow

Discover the top airline that operate flights from Boston to Heathrow. 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 629,999 searches. Data last updated 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 597AverageC$ 738FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to Heathrow?

Cheapflights helps you search for flights from Boston to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Boston to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from Boston to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Boston to Heathrow with no change fees?

Certainly. Search results for flights to Heathrow from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boston to Heathrow become cheaper?

Of course! You can now track prices for flights from Boston to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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