Cheapest return IAD–DUB flights, August

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

Return flights

17 Aug - 10 Sep TAP
17 Aug - 13 Sep TAP
17 Aug - 26 Aug Frontier Airlines
21 Aug - 29 Aug TAP
02 Aug - 06 Sep Icelandair
27 Aug - 31 Aug TAP
17 Aug - 26 Aug Aer Lingus direct
17 Aug - 10 Sep Aer Lingus direct
07 Aug - 15 Aug Porter Airlines (Canada) Ltd
05 Aug - 19 Aug British Airways
04 Aug - 11 Aug Aer Lingus direct
17 Aug - 13 Sep Aer Lingus direct
02 Aug - 06 Sep Aer Lingus direct
05 Aug - 18 Aug British Airways
27 Aug - 31 Aug Aer Lingus direct
06 Aug - 18 Aug United

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

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