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

Return flights

28 Aug - 09 Sep	Scandinavian Airlines
23 Aug - 01 Sep	Scandinavian Airlines
20 Aug - 25 Aug	Scandinavian Airlines
20 Aug - 25 Aug	Aer Lingus	direct
04 Aug - 11 Aug	Lufthansa
04 Aug - 11 Aug	United	direct
14 Aug - 23 Aug	Aer Lingus	direct
06 Aug - 13 Aug	Lufthansa
06 Aug - 13 Aug	United	direct
07 Aug - 14 Aug	United	direct
02 Aug - 09 Aug	Lufthansa
03 Aug - 10 Aug	Aer Lingus	direct
28 Aug - 09 Sep	United	direct
23 Aug - 01 Sep	Aer Lingus	direct

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

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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Cheapest return flights from Washington to Dublin in August from $476

Return flights