AirHint found the following cheapest return flights from Seattle (SEA) to Dublin (DUB) in July 2025 (see full year).

Return flights

30 Jul - 06 Aug	Aer Lingus	direct
29 Jul - 05 Aug	Aer Lingus	direct
28 Jul - 04 Aug	Aer Lingus	direct
30 Jul - 10 Aug	Air Canada
31 Jul - 07 Aug	Iberia
27 Jul - 03 Aug	Delta
31 Jul - 07 Aug	Aer Lingus	direct
21 Jul - 28 Jul	Air Canada
27 Jul - 03 Aug	Aer Lingus	direct
22 Jul - 29 Jul	KLM
25 Jul - 01 Aug	Icelandair
24 Jul - 31 Jul	Icelandair
26 Jul - 02 Aug	Icelandair
26 Jul - 31 Jul	Icelandair
09 Jul - 16 Jul	KLM
23 Jul - 30 Jul	Delta
25 Jul - 30 Jul	Icelandair
07 Jul - 14 Jul	Icelandair
04 Jul - 11 Jul	Icelandair
18 Jul - 20 Jul	Icelandair

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

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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Cheapest return flights from Seattle to Dublin in July from $432

Return flights