Flights from London Heathrow to Boston

Our cheapest offers for flights from London Heathrow to Boston

Here you can compare cheap flights from London Heathrow (LHR) to Boston (BOS) 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 Boston. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London Heathrow
Boston
Outbound
20/10/25
1 Stopover (CPH)
SK0500, SK0927
13h 55min
Return
11/11/25
1 Stopover (CPH)
SK0928, SK1501
23h 05min
SAS Scandinavian Airlines
£365
Best option
London Heathrow
Boston
Outbound
22/06/25
direct
KL2512
07h 45min
Return
05/07/25
direct
KL2511
06h 45min
KLM ?
£453
London Heathrow
Boston
Outbound
03/09/25
1 Stopover (FRA)
LH0923, DE2038
11h 25min
Return
15/09/25
1 Stopover (FRA)
DE2039, LH0904
13h 25min
Lufthansa, Condor
£738
London Heathrow
Boston
Outbound
20/10/25
1 Stopover (CPH)
SK0500, SK0927
13h 55min
Return
11/11/25
2 Stopovers (CPH, OSL)
SK0928, SK1462, SK0805
16h 00min
SAS Scandinavian Airlines
£367
London Heathrow
Boston
Outbound
03/09/25
1 Stopover (ZRH)
LX0319, LX0052
12h 45min
Return
15/09/25
1 Stopover (YUL)
AC8611, AC0866
30h 50min
Swiss International Air Lines
£408
London Heathrow
Boston
Outbound
20/10/25
1 Stopover (LIS)
TP1363, TP0215
19h 05min
Return
11/11/25
1 Stopover (LIS)
TP0218, TP1366
23h 35min
TAP Air Portugal
£425
London Heathrow
Boston
Outbound
09/10/25
1 Stopover (FRA)
LH0903, LH0420
14h 40min
Return
14/10/25
1 Stopover (YUL)
AC0751, AC0866
15h 10min
Lufthansa ?
£425
London Heathrow
Boston
Outbound
11/09/25
1 Stopover (KEF)
FI0451, FI0633
13h 55min
Return
15/09/25
1 Stopover (KEF)
FI0630, FI0450
10h 05min
Icelandair
£428
London Heathrow
Boston
Outbound
03/09/25
1 Stopover (ZRH)
UA9759, UA9722
11h 10min
Return
15/09/25
1 Stopover (YUL)
UA8363, UA8296
30h 50min
United Airlines ?
£433
London Heathrow
Boston
Outbound
09/10/25
2 Stopovers (OSL, CPH)
SK0802, SK0459, SK0927
37h 30min
Return
14/10/25
1 Stopover (CPH)
SK0928, SK0501
10h 40min
SAS Scandinavian Airlines
£437
Prices based on recent searches, subject to last-minute changes
Page 1 / 5

Tips and tricks to help you find cheap flights from London Heathrow to Boston

Favourite airline: Icelandair
Flight tickets on the route London Heathrow – Boston are most frequently booked with Icelandair.
Icelandair
35 %
British Airways
15 %
SAS
15 %
Stopover flights are the cheapest connection
Compared to direct flights, flights with a stopover on this route are on average 11 % cheaper.
non stop flight
1 stop
2 stops
07h 20min
29h 25min
16h 00min
734 GBP
660 GBP
1 055 GBP
Favourite connection: via Reykjavik-Keflavik
The most popular flights on this route are via Reykjavik-Keflavik and are booked by 43 % of all travellers.
Route
bookings
1 stopover Reykjavik-Keflavik International
29h 25min, from 660 GBP
43 %
Direct flights
07h 20min, from 734 GBP
33 %
1 stopover Copenhagen
13h 45min, from 709 GBP
19 %

Important flight information

Flight information: London Heathrow - Boston

Outbound and return from 364,24 GBP
Flight duration min. 07:40 / max. 07:58
Return flight duration min. 06:20/ max. 06:42
Distance 5245 km
Flights per week 42
Departure airport Airport London Heathrow (LHR)
Arrival airport Airport Boston Logan (BOS)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Boston
Flight destinations with a similar price