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

Return flights

18 Jan - 27 Jan	Iberia	direct
21 Jan - 28 Jan	Iberia	direct
26 Jan - 02 Feb	Icelandair
22 Jan - 29 Jan	Aer Lingus	direct
26 Jan - 02 Feb	Aer Lingus	direct
30 Jan - 06 Feb	Aer Lingus	direct
24 Jan - 26 Jan	Aer Lingus	direct
23 Jan - 26 Jan	Aer Lingus	direct
31 Jan - 01 Feb	Aer Lingus	direct
23 Jan - 08 Feb	British Airways

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

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 January from 335€

Return flights