Cheapest return flights from Boston to London in December from $520

Best time to book flights for Boston (BOS) to London (LHR) flights at AirHint

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

Return flights

02 Dec - 09 Dec Icelandair
02 Dec - 06 Dec Icelandair
01 Dec - 14 Dec Aer Lingus
01 Dec - 14 Dec Delta direct
12 Dec - 19 Dec Delta direct
02 Dec - 09 Dec Air France direct
02 Dec - 06 Dec British Airways direct
13 Dec - 20 Dec Icelandair
16 Dec - 31 Dec Air Canada
13 Dec - 20 Dec British Airways direct
27 Dec - 03 Jan Iberia direct
28 Dec - 04 Jan Iberia direct
18 Dec - 03 Jan Iberia direct
24 Dec - 01 Jan Iberia direct
26 Dec - 02 Jan Iberia direct
18 Dec - 07 Jan Iberia direct
14 Dec - 04 Jan Iberia direct
28 Dec - 03 Jan Icelandair
20 Dec - 03 Jan Iberia direct
28 Dec - 03 Jan Iberia direct

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

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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.

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