Cheapest return flights from Boston to Barcelona in September from $274

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

25 Sep - 29 Sep LEVEL direct
22 Sep - 30 Sep LEVEL direct
21 Sep - 29 Sep LEVEL direct
26 Sep - 28 Sep LEVEL direct
22 Sep - 29 Sep LEVEL direct
29 Sep - 10 Oct LEVEL direct
26 Sep - 03 Oct LEVEL direct
30 Sep - 07 Oct LEVEL direct
18 Sep - 21 Sep Iberia direct
01 Sep - 29 Sep LEVEL direct
16 Sep - 25 Sep LEVEL direct
02 Sep - 06 Sep LEVEL direct
10 Sep - 19 Sep LEVEL direct
14 Sep - 01 Oct LEVEL direct
30 Sep - 08 Oct Iberia
30 Sep - 08 Oct Air France direct
26 Sep - 04 Oct Iberia
27 Sep - 04 Oct Icelandair

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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