AirHint found the following cheapest return flights from Basel (BSL) to Boston (BOS) in December 2025 (see full year).
Return flights
| 04 Dec - 21 Jan | Turkish Airlines | ||
| 13 Dec - 17 Dec | Delta | ||
| 31 Dec - 05 Jan | Air Dolomiti | ||
| 13 Dec - 21 Dec | Delta | ||
| 22 Dec - 02 Jan | Lufthansa | ||
| 07 Dec - 07 Dec | Lufthansa |
Also check the deals for one-way flights from Basel to Boston 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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