Cheapest return flights from Boston to Barcelona in September from $351

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

Return flights

30 Sep - 07 Oct Air Canada
28 Sep - 18 Oct Air Canada
25 Sep - 30 Sep Lufthansa
26 Sep - 29 Sep Lufthansa
25 Sep - 29 Sep Lufthansa
25 Sep - 01 Oct Delta direct
30 Sep - 25 Oct Air Canada
23 Sep - 30 Sep Air Canada
23 Sep - 02 Oct Air Canada
25 Sep - 05 Oct Lufthansa
26 Sep - 18 Oct Lufthansa
25 Sep - 28 Sep Lufthansa
26 Sep - 05 Oct Lufthansa
30 Sep - 07 Oct Iberia For Level direct
25 Sep - 18 Oct Lufthansa
20 Sep - 28 Sep Air Canada
19 Sep - 26 Sep United
20 Sep - 27 Sep Air Canada
23 Sep - 25 Sep Iberia direct
19 Sep - 28 Sep Lufthansa

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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