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

Return flights

15 Mar - 22 Mar	TAP
05 Mar - 10 Mar	TAP
19 Mar - 23 Mar	Scandinavian Airlines
20 Mar - 27 Mar	Icelandair
20 Mar - 23 Mar	Icelandair
16 Mar - 23 Mar	Scandinavian Airlines
19 Mar - 29 Mar	Icelandair
04 Mar - 08 Mar	TAP
05 Mar - 15 Mar	TAP
19 Mar - 22 Mar	TAP
26 Mar - 06 Apr	Air Canada
26 Mar - 03 Apr	Air Canada
26 Mar - 03 Apr	Aer Lingus	direct
26 Mar - 05 Apr	Air Canada
27 Mar - 06 Apr	United
31 Mar - 04 Apr	SWISS
31 Mar - 04 Apr	Aer Lingus	direct
27 Mar - 05 Apr	Air Canada

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 $432

Return flights