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

Return flights

13 May - 23 May	Icelandair
15 May - 23 May	Icelandair
15 May - 24 May	Icelandair
16 May - 26 May	Icelandair
09 May - 15 May	Icelandair
01 May - 04 May	Iberia	direct
09 May - 12 May	Iberia	direct
16 May - 23 May	Icelandair
08 May - 15 May	Icelandair
10 May - 15 May	Icelandair
29 May - 01 Jun	Iberia
25 May - 01 Jun	Iberia
31 May - 09 Jun	United
27 May - 03 Jun	Iberia	direct
26 May - 02 Jun	Iberia	direct
29 May - 05 Jun	Iberia	direct
31 May - 07 Jun	Iberia
30 May - 02 Jun	Iberia	direct
30 May - 06 Jun	Iberia	direct
31 May - 03 Jun	Iberia

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

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 May from $403

Return flights