AirHint found the following cheapest one-way flights from Seattle (SEA) to Dublin (DUB) in December 2026 (see full year).
One-Way flights
| 09 Dec | Icelandair | ||
| 08 Dec | British Airways | ||
| 09 Dec | Aer Lingus | direct | |
| 23 Dec | Delta | ||
| 23 Dec | Aer Lingus | direct |
Also check the deals for return flights from Seattle to Dublin in December.
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