Cheapest one-way flights from Seattle to Dublin in December from 240€

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

One-Way flights

05 Dec Frontier Airlines
10 Dec Hawaiian Airlines
11 Dec Frontier Airlines
12 Dec Alaska Airlines
13 Dec Hawaiian Airlines
14 Dec Hawaiian Airlines
15 Dec Hawaiian Airlines
10 Dec Aer Lingus direct
16 Dec United
05 Dec Aer Lingus direct

Also check the deals for return flights from Seattle 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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