AirHint found the following cheapest return flights from Seattle (SEA) to Dublin (DUB) in January 2026 (see full year).
Return flights
| 21 Jan - 28 Jan | Lufthansa | ||
| 30 Jan - 02 Feb | Icelandair | ||
| 19 Jan - 26 Jan | United | ||
| 22 Jan - 26 Jan | Lufthansa | ||
| 18 Jan - 21 Jan | Alaska Airlines |
Also check the deals for one-way flights from Seattle to Dublin in January.
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