Cheapest one-way flights from Boston to Barcelona in September from $173

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

One-Way flights

07 Sep Icelandair
14 Sep Icelandair
28 Sep Iberia For Level direct
29 Sep Iberia For Level direct
30 Sep Iberia For Level direct
03 Sep Icelandair
16 Sep Icelandair
23 Sep Icelandair
21 Sep Icelandair
22 Sep Iberia For Level direct

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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Feel free to contact us with any feedback or request another flight research.