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

Return flights

22 Jul - 06 Aug	jetBlue
30 Jul - 13 Aug	jetBlue
29 Jul - 05 Aug	jetBlue
15 Jul - 22 Aug	jetBlue
28 Jul - 06 Aug	Air Canada
27 Jul - 05 Aug	Air France
23 Jul - 05 Aug	Air France
22 Jul - 29 Jul	Air France
12 Jul - 09 Aug	jetBlue
31 Jul - 07 Aug	United
15 Jul - 23 Jul	jetBlue
28 Jul - 04 Aug	Air Canada
15 Jul - 22 Jul	KLM
14 Jul - 22 Jul	Air France
16 Jul - 25 Jul	Delta
21 Jul - 28 Jul	United
16 Jul - 23 Jul	jetBlue
17 Jul - 24 Jul	United
11 Jul - 23 Jul	jetBlue
02 Jul - 08 Jul	Air Canada

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 $480

Return flights