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

Return flights

02 Mar - 06 Mar	Icelandair
05 Mar - 11 Mar	Icelandair
05 Mar - 12 Mar	Icelandair
17 Mar - 24 Mar	Icelandair
18 Mar - 25 Mar	Icelandair
02 Mar - 09 Mar	Icelandair
22 Mar - 29 Mar	Icelandair
04 Mar - 08 Mar	Icelandair
15 Mar - 22 Mar	TAP
15 Mar - 25 Mar	Icelandair
19 Mar - 01 Apr	Icelandair
01 Mar - 01 Apr	Icelandair
11 Mar - 04 Apr	Icelandair
30 Mar - 09 Apr	TAP
29 Mar - 11 Apr	Icelandair
16 Mar - 11 Apr	Icelandair
15 Mar - 04 Apr	Icelandair
27 Mar - 18 Apr	Icelandair
27 Mar - 03 Apr	Icelandair
01 Mar - 01 Apr	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 $397

Return flights