AirHint found the following cheapest one-way flights from Seattle (SEA) to Dublin (DUB) in October 2025 (see full year).
One-Way flights
| 20 Oct | Alaska Airlines | ||
| 17 Oct | Hawaiian Airlines | ||
| 18 Oct | Hawaiian Airlines | ||
| 20 Oct | Aer Lingus | direct | |
| 18 Oct | Aer Lingus | direct | |
| 17 Oct | Aer Lingus | direct |
Also check the deals for return flights from Seattle to Dublin in October.
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