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

Return flights

25 Jul - 26 Aug	Air Canada
25 Jul - 26 Aug	Aer Lingus	direct
29 Jul - 09 Aug	Air Canada
31 Jul - 10 Aug	Air Canada
29 Jul - 09 Aug	Aer Lingus	direct
20 Jul - 31 Jul	Air France
14 Jul - 21 Jul	Lufthansa
15 Jul - 22 Jul	Lufthansa
13 Jul - 20 Jul	SWISS
08 Jul - 15 Jul	Lufthansa
08 Jul - 29 Jul	Lufthansa
20 Jul - 31 Jul	Aer Lingus	direct
24 Jul - 31 Jul	Aer Lingus	direct
15 Jul - 22 Jul	Aer Lingus	direct
14 Jul - 21 Jul	Aer Lingus	direct
31 Jul - 10 Aug	Aer Lingus	direct

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 $700

Return flights