Cheapest return flights from Boston to Barcelona in September from $343

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

28 Sep - 07 Oct LEVEL direct
21 Sep - 28 Sep LEVEL direct
21 Sep - 29 Sep LEVEL direct
13 Sep - 18 Sep LEVEL direct
01 Sep - 10 Sep LEVEL direct
02 Sep - 10 Sep LEVEL direct
04 Sep - 08 Sep Icelandair
19 Sep - 26 Sep LEVEL direct
13 Sep - 27 Sep Icelandair
11 Sep - 15 Sep Icelandair
25 Sep - 05 Oct Iberia direct
24 Sep - 02 Oct British Airways
05 Sep - 09 Sep Fly Play

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.

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