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

Return flights

22 Jul - 20 Aug	Aer Lingus	direct
30 Jul - 06 Aug	Air Canada
22 Jul - 29 Jul	United	direct
21 Jul - 29 Jul	United
29 Jul - 08 Aug	United	direct
30 Jul - 05 Aug	United	direct
22 Jul - 06 Aug	United	direct
30 Jul - 08 Aug	United	direct
30 Jul - 06 Aug	United	direct
21 Jul - 27 Jul	United
29 Jul - 05 Aug	Lufthansa
22 Jul - 28 Jul	Air Canada
25 Jul - 01 Aug	United	direct
23 Jul - 27 Jul	Delta
23 Jul - 28 Jul	Air Canada
24 Jul - 04 Aug	United	direct
25 Jul - 28 Jul	Air Canada
23 Jul - 29 Jul	Air Canada
24 Jul - 31 Jul	Delta
23 Jul - 27 Jul	United	direct

Also check the deals for one-way flights from Washington 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 Washington to Dublin in July from $457

Return flights