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

Return flights

18 Mar - 24 Mar	Icelandair
17 Mar - 24 Mar	Lufthansa
15 Mar - 23 Mar	Lufthansa
15 Mar - 24 Mar	SWISS
16 Mar - 23 Mar	Lufthansa
08 Mar - 16 Mar	TAP
18 Mar - 27 Mar	Aer Lingus	direct
17 Mar - 23 Mar	SWISS
04 Mar - 08 Mar	Icelandair
18 Mar - 24 Mar	Aer Lingus	direct
25 Mar - 01 Apr	Aer Lingus	direct
23 Mar - 03 Apr	United	direct
27 Mar - 04 Apr	Allegiant Air
28 Mar - 02 Apr	Aer Lingus	direct
29 Mar - 04 Apr	Lufthansa
28 Mar - 06 Apr	Aer Lingus	direct
30 Mar - 05 Apr	Delta
27 Mar - 06 Apr	Air Canada
29 Mar - 05 Apr	Aer Lingus	direct
27 Mar - 03 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 473€

Return flights