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

Return flights

03 Dec - 10 Dec	TAP
05 Dec - 13 Dec	TAP
11 Dec - 08 Jan	TAP
06 Dec - 14 Dec	Ryanair
11 Dec - 10 Jan	TAP
10 Dec - 07 Jan	TAP
11 Dec - 07 Jan	TAP
18 Dec - 05 Jan	TAP
02 Dec - 05 Dec	Icelandair
17 Dec - 04 Jan	TAP
18 Dec - 04 Jan	TAP
05 Dec - 08 Jan	TAP
02 Dec - 07 Jan	TAP
03 Dec - 07 Jan	TAP
15 Dec - 28 Dec	Ryanair
05 Dec - 14 Dec	Aer Lingus
13 Dec - 17 Dec	Aer Lingus
14 Dec - 27 Dec	TAP
18 Dec - 25 Dec	TAP
24 Dec - 30 Dec	Iberia

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

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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Cheapest return flights from Frankfurt to Boston in December from 378€

Return flights