Cheapest return IAD–DUB flights, May

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

Return flights

26 May - 17 Jun Porter Airlines (Canada) Ltd
29 May - 09 Jun Porter Airlines (Canada) Ltd
26 May - 15 Jun Porter Airlines (Canada) Ltd
24 May - 01 Jun Porter Airlines (Canada) Ltd
30 May - 15 Jun Porter Airlines (Canada) Ltd
29 May - 07 Jun Porter Airlines (Canada) Ltd
26 May - 05 Jun Porter Airlines (Canada) Ltd
27 May - 30 May Porter Airlines (Canada) Ltd
11 May - 18 May TAP
17 May - 15 Jun Lufthansa
24 May - 01 Jun Aer Lingus direct
26 May - 05 Jun Aer Lingus direct
18 May - 26 May SWISS
27 May - 31 May Porter Airlines (Canada) Ltd
10 May - 19 May TAP
18 May - 26 May Aer Lingus direct
20 May - 26 May Delta
08 May - 19 May TAP
19 May - 25 May Brussels Airlines
21 May - 25 May Porter Airlines (Canada) Ltd

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

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