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

Return flights

13 Dec - 30 Dec	Iberia For Level	direct
11 Dec - 14 Dec	Iberia For Level	direct
11 Dec - 16 Dec	Iberia For Level	direct
16 Dec - 29 Dec	Iberia	direct
16 Dec - 30 Dec	Iberia	direct
08 Dec - 15 Dec	Iberia
02 Dec - 16 Dec	Iberia
12 Dec - 14 Dec	Iberia
06 Dec - 15 Dec	Iberia
12 Dec - 15 Dec	Iberia
14 Dec - 07 Jan	KLM
15 Dec - 08 Jan	KLM
19 Dec - 07 Jan	Air France
25 Dec - 08 Jan	TAP
25 Dec - 01 Jan	TAP
25 Dec - 05 Jan	TAP
26 Dec - 04 Jan	TAP
15 Dec - 08 Jan	Iberia	direct
25 Dec - 08 Jan	Iberia	direct
25 Dec - 01 Jan	Iberia For Level	direct

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 $325

Return flights