Flights from Boston to London Heathrow

Our cheapest offers for flights from Boston to London Heathrow

Here you can compare cheap flights from Boston (BOS) to London Heathrow (LHR) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to London Heathrow. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Best option
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0450
18h 20min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair
$708
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (FRA)
DE2039, LH0904
13h 25min
Return
07/19/25
1 Stopover (FRA)
LH0921, DE2038
12h 25min
Condor, Lufthansa
$1,331
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0450
18h 20min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair
$713
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0450
18h 20min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair ?
$730
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0454
26h 45min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair ?
$745
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0450
18h 20min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair ?
$756
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (KEF)
FI0634, FI0450
18h 20min
Return
07/19/25
1 Stopover (KEF)
FI0455, FI0633
29h 35min
Icelandair ?
$769
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (DUB)
EI0132, EI0152
09h 30min
Return
07/19/25
1 Stopover (SNN)
EI0381, EI0135
10h 40min
Aer Lingus Irish Airlines
$832
Boston
London Heathrow
Outbound
06/20/25
1 Stopover (JFK)
AY4256, AY5472
10h 23min
Return
07/19/25
1 Stopover (JFK)
AY4017, AY4153
12h 16min
Finnair
$935
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Boston to London Heathrow

Favorite airline: Icelandair
The most popular airline for flights from Boston to London Heathrow is Icelandair.
Icelandair
28 %
United Airlines
17 %
Air Canada
16 %
Direct flights are more expensive
Compared to direct flights, flights with a stopover on this route are on average 30 % cheaper.
non stop flight
1 stop
2 stops
06h 50min
18h 20min
21h 30min
$ 564
$ 433
$ 583
Favourite connection: via Reykjavik-Keflavik
The most popular route is via Reykjavik-Keflavik and is booked by 35 % of all travelers.
Route
bookings
1 stopover Reykjavik-Keflavik International
18h 20min, from $ 433
35 %
1 stopover Montréal-Pierre Elliott Trudeau International Airport
30h 25min, from $ 537
26 %
Direct flights
06h 50min, from $ 564
20 %

Important flight information

Flight information: Boston - London Heathrow

Roundtrip from $ 707,23
Flight duration min. 06:20 / max. 06:42
Return flight duration min. 07:40/ max. 07:58
Distance 5245 km
Flights per week 42
Departure airport Airport Boston Logan International Airport, MA (BOS)
Arrival airport Airport London Heathrow (LHR)
Destination country Flights to United Kingdom
Alternative routes to United Kingdom
Alternative flights to London Heathrow
Flight destinations with a similar price
Flight destinations with a similar price