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

Return flights

22 Mar - 29 Mar	Icelandair
24 Mar - 31 Mar	Icelandair
11 Mar - 18 Mar	Icelandair
25 Mar - 01 Apr	Icelandair
29 Mar - 05 Apr	Icelandair
01 Mar - 21 Mar	Icelandair
03 Mar - 10 Mar	Aer Lingus	direct
04 Mar - 11 Mar	Aer Lingus	direct
12 Mar - 21 Mar	Icelandair
27 Mar - 03 Apr	Icelandair
30 Mar - 06 Apr	Air Canada
28 Mar - 04 Apr	Icelandair
11 Mar - 18 Mar	Aer Lingus	direct
10 Mar - 17 Mar	Aer Lingus	direct
09 Mar - 16 Mar	Aer Lingus	direct
26 Mar - 02 Apr	Icelandair
26 Mar - 07 Apr	Turkish Airlines
27 Mar - 04 Apr	Icelandair
27 Mar - 18 Apr	Icelandair
25 Mar - 01 Apr	United	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 336€

Return flights