Cheapest return flights from Washington to Dublin in September from $553

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

Return flights

04 Sep - 13 Sep Scandinavian Airlines
03 Sep - 07 Sep Scandinavian Airlines
02 Sep - 07 Sep TAP
02 Sep - 06 Sep TAP
08 Sep - 15 Sep Aer Lingus direct
08 Sep - 14 Sep TAP
01 Sep - 08 Sep TAP
01 Sep - 08 Sep United direct
07 Sep - 14 Sep SWISS
08 Sep - 14 Sep Aer Lingus direct

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

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