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

Return flights

18 May - 24 May	Scandinavian Airlines
12 May - 19 May	Iberia	direct
12 May - 06 Jun	Iberia	direct
18 May - 26 May	Iberia	direct
07 May - 21 May	Iberia	direct
18 May - 13 Jun	Iberia	direct
15 May - 22 May	Iberia	direct
15 May - 26 May	Iberia	direct
19 May - 13 Jun	Iberia	direct
08 May - 30 May	Icelandair
09 May - 30 May	Icelandair
08 May - 30 May	Iberia	direct
09 May - 30 May	Iberia	direct
21 May - 07 Jun	Condor
29 May - 12 Jun	Iberia	direct
21 May - 07 Jun	Iberia	direct
25 May - 20 Jun	Iberia
25 May - 20 Jun	Iberia	direct

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

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Boston to Barcelona in May from 365€

Return flights