AirHint found the following cheapest return flights from Boston (BOS) to London (LGW) in December 2026 (see full year).
Return flights
| 27 Dec - 10 Jan | Iberia | ||
| 30 Dec - 13 Jan | SWISS | ||
| 22 Dec - 29 Dec | Icelandair | ||
| 25 Dec - 06 Jan | TAP | ||
| 27 Dec - 02 Jan | Icelandair | ||
| 19 Dec - 31 Dec | Icelandair | ||
| 19 Dec - 01 Jan | Icelandair | ||
| 15 Dec - 29 Dec | TAP |
Also check the deals for one-way flights from Boston to London in December.
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