Cheapest one-way flights from Seattle to Dublin in September from 218€

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

One-Way flights

20 Sep Frontier Airlines
05 Sep Hawaiian Airlines
26 Sep Frontier Airlines
14 Sep Alaska Airlines
16 Sep WestJet
01 Sep Icelandair
01 Sep Aer Lingus direct
15 Sep United
15 Sep Aer Lingus direct
16 Sep Aer Lingus direct

Also check the deals for return flights from Seattle to Dublin in September.

Skyscanner

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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