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

Return flights

08 Dec - 30 Dec	Iberia For Level	direct
08 Dec - 14 Dec	Iberia For Level	direct
16 Dec - 29 Dec	Iberia For Level	direct
11 Dec - 16 Dec	Iberia For Level	direct
08 Dec - 15 Dec	Iberia For Level	direct
16 Dec - 30 Dec	Iberia For Level	direct
06 Dec - 15 Dec	Iberia	direct
06 Dec - 14 Dec	Iberia	direct
10 Dec - 14 Dec	Iberia
25 Dec - 29 Dec	Iberia	direct
11 Dec - 01 Jan	Iberia For Level	direct
27 Dec - 04 Jan	TAP
18 Dec - 04 Jan	TAP
27 Dec - 01 Jan	TAP
27 Dec - 05 Jan	TAP
25 Dec - 05 Jan	TAP
25 Dec - 01 Jan	TAP
26 Dec - 01 Jan	TAP
25 Dec - 01 Jan	Iberia For Level	direct
26 Dec - 10 Jan	KLM

Also check the deals for one-way flights from Barcelona 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 Barcelona to Boston in December from 277€

Return flights