Cheapest one-way flights from Boston to Barcelona in September from $225

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

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

One-Way flights

22 Sep Iberia direct
30 Sep Iberia direct
02 Sep Icelandair
15 Sep Vueling Airlines direct
16 Sep Vueling Airlines direct
02 Sep Vueling Airlines direct
03 Sep Iberia direct
06 Sep Iberia direct
12 Sep Icelandair
05 Sep Air France

Also check the deals for return 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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