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Cheap flights from Boston to London Heathrow Airport from C$ 390

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
24 Aug — 31 Aug1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to London Heathrow are usually found in January or October, booked 54 days in advance, depart on a Thursday 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 25 July 2026.

Thu 1/108:50 p.m.
BOS
-
LHR
1 stop18h 30m
Icelandair
Sat 10/101:05 p.m.
LHR
-
BOS
1 stop10h 45m
Icelandair
Deal found 22/7C$ 930
Sun 8/117:50 p.m.
BOS
-
LHR
1 stop10h 00m
Icelandair
Thu 12/1112:15 p.m.
LHR
-
BOS
1 stop10h 35m
Icelandair
Deal found 20/7C$ 931
Sun 4/1011:00 p.m.
BOS
-
LHR
1 stop31h 55m
Icelandair
Fri 9/101:05 p.m.
LHR
-
BOS
1 stop10h 45m
Icelandair
Deal found 22/7C$ 932
Wed 21/1011:00 p.m.
BOS
-
LHR
1 stop31h 55m
Icelandair
Mon 2/118:35 p.m.
LHR
-
BOS
1 stop26h 15m
Icelandair
Deal found 23/7C$ 934
Mon 2/115:35 p.m.
BOS
-
LHR
2 stops18h 25m
Scandinavian Airlines
Wed 18/117:50 p.m.
LHR
-
BOS
2 stops24h 50m
Scandinavian Airlines
Deal found 21/7C$ 935
Mon 19/105:50 p.m.
BOS
-
LHR
2 stops18h 10m
Scandinavian Airlines
Sun 25/107:50 p.m.
LHR
-
BOS
2 stops24h 50m
Scandinavian Airlines
Deal found 21/7C$ 937
Tue 13/105:40 p.m.
BOS
-
LHR
2 stops18h 20m
Scandinavian Airlines
Tue 20/109:05 p.m.
LHR
-
BOS
2 stops23h 30m
Scandinavian Airlines
Deal found 24/7C$ 938
Tue 13/105:40 p.m.
BOS
-
LHR
2 stops18h 20m
Scandinavian Airlines
Mon 19/109:05 p.m.
LHR
-
BOS
2 stops23h 30m
Scandinavian Airlines
Deal found 22/7C$ 939
Fri 25/98:50 p.m.
BOS
-
LHR
1 stop18h 30m
Icelandair
Mon 12/109:25 p.m.
LHR
-
BOS
1 stop26h 25m
Icelandair
Deal found 23/7C$ 941
Mon 28/98:50 p.m.
BOS
-
LHR
1 stop10h 05m
Icelandair
Thu 29/108:35 p.m.
LHR
-
BOS
1 stop26h 15m
Icelandair
Deal found 21/7C$ 942
Sun 13/98:50 p.m.
BOS
-
LHR
1 stop10h 05m
Icelandair
Sun 25/108:35 p.m.
LHR
-
BOS
1 stop26h 15m
Icelandair
Deal found 20/7C$ 944
Sat 12/911:00 p.m.
BOS
-
LHR
1 stop31h 55m
Icelandair
Mon 19/109:25 p.m.
LHR
-
BOS
1 stop26h 25m
Icelandair
Deal found 22/7C$ 945

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 25 July 2026.

Round-trip from

C$ 930

One-way from

C$ 390

Popular in

June

Cheapest in

January

Average price

C$ 1,255

Good round-trip deal

C$ 694 or less

Good one-way deal

C$ 670 or less
Icelandair
  • Icelandair
  • 1/10-14/10
  • 2 total stops
  • 32h 10m total
  • Boston to London
Search Deals
Iberia
  • Iberia
  • 20/9
  • Nonstop
  • 6h 30m total
  • Boston to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 417 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 67 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 25 July 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

Thu 3/9

6:00 a.m.-8:40 p.m.

1 stop9h 40m

London Heathrow

Fri 4/9

12:10 p.m.-7:55 p.m.

1 stop12h 45m

C$ 934

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 23/8

9:40 p.m.-7:55 a.m.

1 stop29h 15m

London Heathrow

Wed 26/8

7:25 a.m.-5:40 p.m.

1 stop15h 15m

C$ 985

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 18/10

5:50 p.m.-2:35 p.m.

2 stops15h 45m

London Heathrow

Thu 22/10

9:05 p.m.-3:35 p.m.

2 stops23h 30m

C$ 999

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 2/12

12:00 p.m.-4:00 p.m.

2 stops23h 00m

London Heathrow

Wed 9/12

6:40 a.m.-3:40 p.m.

2 stops14h 00m

C$ 1,052

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 25/11

9:50 p.m.-8:05 a.m.

1 stop29h 15m

London Heathrow

Sat 28/11

6:35 a.m.-6:35 p.m.

1 stop17h 00m

C$ 1,100

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 12/8

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

Nonstop6h 35m

London Heathrow

Thu 20/8

11:30 a.m.-7:35 p.m.

1 stop13h 05m

C$ 1,114

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Mon 10/8

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

Nonstop6h 35m

London Heathrow

Tue 25/8

9:55 a.m.-4:37 p.m.

1 stop11h 42m

C$ 1,114

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 9/8

3:35 p.m.-10:00 a.m.

1 stop13h 25m

London Heathrow

Sat 22/8

6:55 a.m.-5:40 p.m.

1 stop15h 45m

C$ 1,114

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Sun 16/8

3:35 p.m.-6:30 a.m.

1 stop9h 55m

London Heathrow

Tue 25/8

10:50 a.m.-5:40 p.m.

1 stop11h 50m

C$ 1,114

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 22/10

7:05 p.m.-6:45 a.m.

Nonstop6h 40m

London Heathrow

Sun 25/10

6:30 a.m.-2:25 p.m.

1 stop11h 55m

C$ 1,117

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/7

Showing 1-10 of 23 resultsSorted by cheapest first
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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?

To ensure you get the cheapest price possible for a flight from Boston to London Heathrow Airport, you should look to book at least 53 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, January is the cheapest month in which you can book a flight from Boston to London Heathrow Airport (average of C$ 742). Flying from Boston to London Heathrow Airport in June is currently the most expensive (average of C$ 1,470). 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 25 July 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?

Airfare is typical for this route at the moment.

Boston to London Heathrow Airport flights typically cost between C$ 884 and C$ 1,244 in October.
The cheapest round-trip price found within the last 5 days was C$ 930 on Icelandair (1 Oct-14 Oct).

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 34 outbound flights to London Heathrow per day. 0 airlines have 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 and Scandinavian Airlines can get you from Boston to London Heathrow Airport in just under 9h 40m. Your travel time can differ by up to 6h 05m. Airlines will cover a distance of 5237 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 (93%), JetBlue (85%) or TAP AIR PORTUGAL (85%) 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$ 425. While the most popular route (Boston Logan Intl - London Heathrow) can be booked for C$ 1,234 on average, our data indicates C$ 817 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, January is the cheapest month in which you can book a flight from Boston to London Heathrow Airport (average of C$ 742). Flying from Boston to London Heathrow Airport in June is currently the most expensive (average of C$ 1,470). 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
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

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

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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.

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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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