Cheapest return flights from Washington to Dublin in September from $485

Best time to book flights for Washington (IAD) to Dublin (DUB) flights at AirHint

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

Return flights

28 Sep - 12 Oct Scandinavian Airlines
30 Sep - 08 Oct Scandinavian Airlines
09 Sep - 17 Sep Scandinavian Airlines
05 Sep - 07 Sep Scandinavian Airlines
09 Sep - 16 Sep Scandinavian Airlines
24 Sep - 01 Oct Scandinavian Airlines
02 Sep - 09 Sep Scandinavian Airlines
16 Sep - 22 Sep Scandinavian Airlines
18 Sep - 30 Sep TAP
25 Sep - 29 Sep TAP
26 Sep - 03 Oct TAP
11 Sep - 15 Sep Scandinavian Airlines
12 Sep - 24 Sep Aer Lingus direct
13 Sep - 20 Sep Scandinavian Airlines
30 Sep - 08 Oct Aer Lingus direct
26 Sep - 03 Oct Aer Lingus direct
28 Sep - 12 Oct Aer Lingus direct
24 Sep - 01 Oct United direct
27 Sep - 04 Oct Aer Lingus direct

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

Skyscanner

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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