AirHint found the following cheapest return flights from Boston (BOS) to Barcelona (BCN) in January 2026 (see full year).

Return flights

23 Jan - 27 Jan	Icelandair
31 Jan - 08 Feb	TAP
25 Jan - 02 Feb	Iberia
22 Jan - 26 Jan	Iberia
30 Jan - 02 Feb	Iberia
23 Jan - 26 Jan	Iberia
28 Jan - 02 Feb	SWISS
14 Jan - 21 Jan	TAP
25 Jan - 29 Jan	LEVEL	direct
18 Jan - 24 Jan	Iberia
24 Jan - 31 Jan	Iberia	direct
15 Jan - 21 Jan	TAP
18 Jan - 24 Jan	LEVEL	direct
24 Jan - 29 Jan	LEVEL	direct
25 Jan - 02 Feb	LEVEL	direct
31 Jan - 03 Feb	Iberia	direct
15 Jan - 02 Feb	TAP
15 Jan - 02 Feb	LEVEL	direct
29 Jan - 01 Feb	Iberia

Also check the deals for one-way flights from Boston to Barcelona in January.

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 Boston to Barcelona in January from 334€

Return flights