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

Return flights

29 Jul - 05 Aug	jetBlue
24 Jul - 31 Jul	jetBlue
27 Jul - 03 Aug	jetBlue
23 Jul - 30 Jul	jetBlue
26 Jul - 02 Aug	jetBlue
28 Jul - 04 Aug	jetBlue
29 Jul - 07 Aug	Air Canada
22 Jul - 31 Jul	Delta
22 Jul - 06 Aug	United
25 Jul - 01 Aug	jetBlue
13 Jul - 24 Jul	Air Canada
16 Jul - 25 Jul	Delta
15 Jul - 22 Jul	United
21 Jul - 04 Aug	Air France
11 Jul - 23 Jul	Delta
14 Jul - 22 Jul	Air France
30 Jul - 06 Aug	United
16 Jul - 28 Jul	United
24 Jul - 30 Jul	jetBlue
06 Jul - 01 Aug	jetBlue

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 393€

Return flights