AirHint found the following cheapest return flights from Washington (IAD) to Dublin (DUB) in March 2026 (see full year).

Return flights

26 Mar - 02 Apr	Aer Lingus	direct
02 Mar - 09 Mar	Aer Lingus	direct
29 Mar - 05 Apr	Aer Lingus	direct
12 Mar - 24 Mar	Icelandair
14 Mar - 28 Mar	TAP
17 Mar - 31 Mar	TAP
12 Mar - 19 Mar	Icelandair
15 Mar - 22 Mar	TAP
29 Mar - 02 Apr	Aer Lingus	direct
17 Mar - 31 Mar	Aer Lingus	direct
22 Mar - 29 Mar	United	direct
12 Mar - 24 Mar	Aer Lingus	direct
14 Mar - 28 Mar	Aer Lingus	direct

Also check the deals for one-way flights from Washington to Dublin in March.

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 March from $515

Return flights