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

Return flights

27 Jan - 04 Feb	TAP
30 Jan - 07 Feb	TAP
31 Jan - 08 Feb	TAP
22 Jan - 27 Jan	TAP
20 Jan - 27 Jan	TAP
22 Jan - 29 Jan	TAP
15 Jan - 22 Jan	TAP
21 Jan - 28 Jan	TAP
24 Jan - 31 Jan	TAP
30 Jan - 06 Feb	TAP
11 Jan - 17 Jan	Iberia	direct
10 Jan - 18 Jan	Iberia	direct
22 Jan - 27 Jan	Iberia	direct
08 Jan - 31 Jan	Iberia	direct
22 Jan - 02 Feb	Iberia	direct
23 Jan - 03 Feb	Icelandair
27 Jan - 03 Feb	TAP
28 Jan - 21 Feb	Aer Lingus

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 302€

Return flights