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

Return flights

15 May - 22 May	Condor
19 May - 26 May	Condor
04 May - 14 May	LEVEL	direct
06 May - 13 May	LEVEL	direct
14 May - 21 May	Condor
11 May - 15 May	Condor
15 May - 25 May	Condor
13 May - 20 May	LEVEL	direct
12 May - 19 May	LEVEL	direct
11 May - 15 May	LEVEL	direct
26 May - 02 Jun	Condor
28 May - 04 Jun	Condor
29 May - 05 Jun	Condor
31 May - 07 Jun	Condor
24 May - 07 Jun	Condor
27 May - 03 Jun	jetBlue
25 May - 13 Jun	Condor
30 May - 06 Jun	TAP
26 May - 02 Jun	Iberia	direct
28 May - 04 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.

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Cheapest return flights from Boston to Barcelona in May from 264€

Return flights