Cheapest return flights from Seattle to Dublin in September from $512

AirHint found the following cheapest return flights from Seattle (SEA) to Dublin (DUB) in September 2026 (see full year).

Return flights

04 Sep - 12 Sep Scandinavian Airlines
01 Sep - 07 Sep Scandinavian Airlines
30 Sep - 07 Oct jetBlue
04 Sep - 15 Sep Air Canada
13 Sep - 27 Sep Turkish Airlines
27 Sep - 04 Oct Turkish Airlines
16 Sep - 23 Sep Aer Lingus direct
30 Sep - 07 Oct Aer Lingus direct
01 Sep - 07 Sep Aer Lingus direct
13 Sep - 27 Sep Aer Lingus direct

Also check the deals for one-way flights from Seattle to Dublin in September.

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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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