Cheapest return flights from Washington to Dublin in September from 344€

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

03 Sep - 11 Sep Fly Play
14 Sep - 23 Sep Fly Play
12 Sep - 18 Sep Fly Play
08 Sep - 19 Sep Fly Play
03 Sep - 09 Sep Fly Play
08 Sep - 14 Sep Fly Play
13 Sep - 21 Sep Fly Play
01 Sep - 07 Sep Fly Play
16 Sep - 22 Sep Fly Play
03 Sep - 09 Sep 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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