Cheapest return flights from Boston to London in December from $580

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

10 Dec - 17 Dec Icelandair
10 Dec - 17 Dec Virgin Atlantic direct
15 Dec - 22 Dec Icelandair
13 Dec - 20 Dec Icelandair
29 Dec - 07 Jan Icelandair
13 Dec - 20 Dec Delta direct
15 Dec - 22 Dec British Airways direct
16 Dec - 30 Dec Icelandair
29 Dec - 07 Jan Delta direct
23 Dec - 31 Dec Icelandair
16 Dec - 30 Dec British Airways direct
15 Dec - 31 Dec Icelandair
24 Dec - 03 Jan Icelandair
27 Dec - 03 Jan Icelandair
24 Dec - 03 Jan British Airways direct
20 Dec - 03 Jan Iberia
27 Dec - 03 Jan Iberia direct
20 Dec - 03 Jan British Airways 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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