Cheapest return flights from Boston to London in December from 349€

AirHint found the following cheapest return flights from Boston (BOS) to London (LHR) in December 2025 (see full year).

Return flights

02 Dec - 04 Dec Lufthansa
12 Dec - 14 Dec Iberia
01 Dec - 08 Dec TAP
03 Dec - 08 Dec TAP
10 Dec - 14 Dec Air Canada
03 Dec - 09 Dec Aer Lingus
09 Dec - 16 Dec Aer Lingus
02 Dec - 10 Dec Aer Lingus
03 Dec - 14 Dec Aer Lingus
03 Dec - 10 Dec United
29 Dec - 04 Jan Icelandair
23 Dec - 03 Jan Icelandair
23 Dec - 02 Jan Icelandair
26 Dec - 02 Jan Icelandair
23 Dec - 01 Jan Icelandair
19 Dec - 03 Jan Icelandair
29 Dec - 04 Jan American Airlines direct
12 Dec - 02 Jan Air Canada
12 Dec - 01 Jan Air Canada
11 Dec - 02 Jan Air Canada

Also check the deals for one-way flights from Boston to London in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.