Cheapest return flights from Washington to Barcelona in September from $482

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

Return flights

01 Sep - 10 Sep TAP
01 Sep - 11 Sep TAP
22 Sep - 29 Sep Iberia
20 Sep - 08 Oct Iberia
01 Sep - 12 Sep TAP
10 Sep - 18 Sep TAP
03 Sep - 13 Sep TAP
03 Sep - 07 Sep TAP
20 Sep - 08 Oct United direct
01 Sep - 10 Sep United direct
01 Sep - 11 Sep United direct
10 Sep - 18 Sep United direct

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

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