Cheapest return IAD–DUB flights, September

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

Return flights

30 Sep - 07 Oct Scandinavian Airlines
25 Sep - 02 Oct Scandinavian Airlines
12 Sep - 19 Sep Scandinavian Airlines
29 Sep - 06 Oct Turkish Airlines
17 Sep - 24 Sep Turkish Airlines
19 Sep - 26 Sep Scandinavian Airlines
14 Sep - 21 Sep Turkish Airlines
21 Sep - 28 Sep Turkish Airlines
06 Sep - 13 Sep Turkish Airlines
20 Sep - 27 Sep Turkish Airlines
02 Sep - 09 Sep TAP
07 Sep - 21 Sep Turkish Airlines
28 Sep - 03 Oct Turkish Airlines
02 Sep - 09 Sep Aer Lingus direct
30 Sep - 07 Oct Aer Lingus direct
29 Sep - 06 Oct Aer Lingus direct
25 Sep - 02 Oct Aer Lingus direct
28 Sep - 03 Oct Aer Lingus direct

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

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