Cheapest return flights from Boston to Barcelona in September from 414€

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

09 Sep - 12 Sep LEVEL direct
03 Sep - 12 Sep LEVEL direct
03 Sep - 05 Sep LEVEL direct
01 Sep - 12 Sep LEVEL direct
01 Sep - 05 Sep LEVEL direct
08 Sep - 12 Sep LEVEL direct
03 Sep - 15 Sep LEVEL direct
01 Sep - 15 Sep LEVEL direct
08 Sep - 15 Sep LEVEL direct
07 Sep - 12 Sep LEVEL direct
26 Sep - 07 Oct LEVEL direct
18 Sep - 07 Oct LEVEL direct
25 Sep - 07 Oct LEVEL direct
21 Sep - 07 Oct LEVEL direct
26 Sep - 10 Oct LEVEL direct
25 Sep - 10 Oct LEVEL direct
21 Sep - 10 Oct LEVEL direct
26 Sep - 16 Oct LEVEL direct
25 Sep - 16 Oct LEVEL direct

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

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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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