Cheapest one-way flights from Washington to Dublin in December from $249

AirHint found the following cheapest one-way flights from Washington (IAD) to Dublin (DUB) in December 2025 (see full year).

One-Way flights

07 Dec Frontier Airlines
12 Dec Frontier Airlines
14 Dec Frontier Airlines
29 Dec Aer Lingus direct
15 Dec TAP
28 Dec Aer Lingus direct
12 Dec Aer Lingus direct
27 Dec Aer Lingus direct
07 Dec United direct
05 Dec Icelandair

Also check the deals for return flights from Washington to Dublin in December.

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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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