Cheapest return flights from Washington to Barcelona in September from $522

AirHint found the following cheapest return flights from Washington (IAD) to Barcelona (BCN) in September 2026 (see full year).

Return flights

02 Sep - 09 Sep TAP
04 Sep - 14 Sep Scandinavian Airlines
01 Sep - 08 Sep TAP
16 Sep - 23 Sep TAP
04 Sep - 11 Sep Scandinavian Airlines
06 Sep - 13 Sep TAP
16 Sep - 20 Sep Scandinavian Airlines
15 Sep - 20 Sep TAP
20 Sep - 08 Oct Turkish Airlines
04 Sep - 07 Sep Scandinavian Airlines
10 Sep - 19 Sep TAP
28 Sep - 04 Oct Royal Air Maroc
29 Sep - 06 Oct Turkish Airlines
30 Sep - 07 Oct Turkish Airlines

Also check the deals for one-way flights from Washington 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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