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

Return flights

15 Jul - 22 Aug	Aer Lingus	direct
22 Jul - 28 Aug	Aer Lingus	direct
29 Jul - 05 Aug	United	direct
22 Jul - 06 Aug	United	direct
30 Jul - 08 Aug	United	direct
14 Jul - 22 Jul	United
15 Jul - 22 Jul	United	direct
22 Jul - 29 Jul	United	direct
23 Jul - 28 Jul	SWISS
24 Jul - 31 Jul	United	direct
31 Jul - 07 Aug	United	direct
22 Jul - 28 Jul	United	direct
21 Jul - 28 Jul	United
27 Jul - 03 Aug	United	direct
29 Jul - 09 Aug	United	direct
14 Jul - 21 Jul	SWISS
24 Jul - 28 Jul	Lufthansa
16 Jul - 20 Jul	United	direct
24 Jul - 04 Aug	United	direct
10 Jul - 16 Aug	SWISS

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 383€

Return flights