Cheapest return flights from Boston to Barcelona in September from 439€

Best time to book flights for Boston (BOS) to Barcelona (BCN) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Barcelona (BCN) in September 2025 (see full year).

Return flights

22 Sep - 02 Oct LEVEL direct
15 Sep - 30 Sep Fly Play
18 Sep - 21 Sep LEVEL direct
01 Sep - 07 Sep Fly Play
09 Sep - 16 Sep Fly Play
10 Sep - 17 Sep TAP
07 Sep - 11 Sep Fly Play
29 Sep - 05 Oct LEVEL direct
15 Sep - 30 Sep LEVEL direct
09 Sep - 16 Sep LEVEL direct
17 Sep - 24 Sep TAP
26 Sep - 05 Oct LEVEL direct
01 Sep - 07 Sep LEVEL direct

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

Skyscanner

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