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 - 08 Jun Porter Airlines (Canada) Ltd
30 May - 15 Jun Porter Airlines (Canada) Ltd
26 May - 29 Jun Porter Airlines (Canada) Ltd
27 May - 07 Jun Frontier Airlines
29 May - 07 Jun Porter Airlines (Canada) Ltd
26 May - 31 May Porter Airlines (Canada) Ltd
17 May - 15 Jun Lufthansa
13 May - 18 May Icelandair
06 May - 13 May TAP
26 May - 05 Jun Porter Airlines (Canada) Ltd
14 May - 17 May Air France
18 May - 02 Jun Aer Lingus direct
12 May - 22 May Aer Lingus direct
10 May - 26 May TAP
13 May - 19 May Aer Lingus direct
08 May - 19 May TAP
06 May - 22 May TAP
13 May - 17 May United direct

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

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