Cheapest return flights from Washington to Barcelona in August from $451

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

Return flights

19 Aug - 26 Aug TAP
13 Aug - 27 Aug TAP
26 Aug - 08 Sep TAP
31 Aug - 07 Sep Scandinavian Airlines
30 Aug - 06 Sep TAP
13 Aug - 27 Aug United direct
19 Aug - 26 Aug Lufthansa direct
26 Aug - 08 Sep United direct

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

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