Cheapest return flights from Boston to London in December from $511

AirHint found the following cheapest return flights from Boston (BOS) to London (LHR) in December 2026 (see full year).

Return flights

07 Dec - 14 Dec Aer Lingus
07 Dec - 14 Dec British Airways direct
14 Dec - 22 Dec Air France direct
28 Dec - 04 Jan Air Canada
14 Dec - 04 Jan Air Canada
28 Dec - 04 Jan Air France direct
14 Dec - 04 Jan Air France direct
25 Dec - 01 Jan Delta direct
19 Dec - 26 Dec Iberia
19 Dec - 26 Dec Air France direct

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

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