Cheapest return flights from Washington to Dublin in September from $481

AirHint found the following cheapest return flights from Washington (IAD) to Dublin (DUB) in September 2025 (see full year).

Return flights

21 Sep - 26 Sep Scandinavian Airlines
29 Sep - 06 Oct Scandinavian Airlines
30 Sep - 07 Oct Scandinavian Airlines
25 Sep - 06 Oct Scandinavian Airlines
16 Sep - 07 Oct Scandinavian Airlines
15 Sep - 18 Sep Scandinavian Airlines
25 Sep - 02 Oct Scandinavian Airlines
13 Sep - 26 Sep Scandinavian Airlines
11 Sep - 04 Oct Scandinavian Airlines
27 Sep - 18 Oct Scandinavian Airlines
25 Sep - 30 Sep Scandinavian Airlines
26 Sep - 18 Oct Scandinavian Airlines
26 Sep - 03 Oct Scandinavian Airlines
30 Sep - 13 Oct Air Canada
06 Sep - 12 Sep Scandinavian Airlines
11 Sep - 16 Sep Aer Lingus direct
06 Sep - 13 Sep Scandinavian Airlines
24 Sep - 30 Sep TAP
13 Sep - 21 Sep Aer Lingus direct
06 Sep - 13 Sep Aer Lingus direct

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

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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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