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

Return flights

24 Jan - 28 Feb	Icelandair
22 Jan - 28 Feb	Icelandair
23 Jan - 30 Jan	Icelandair
05 Jan - 12 Jan	Icelandair
26 Jan - 02 Feb	Icelandair
29 Jan - 05 Feb	Icelandair
14 Jan - 21 Jan	Icelandair
08 Jan - 12 Jan	Icelandair
07 Jan - 14 Jan	Icelandair
09 Jan - 16 Jan	Icelandair
17 Jan - 24 Jan	Icelandair
09 Jan - 31 Jan	Icelandair
20 Jan - 27 Jan	Aer Lingus	direct
14 Jan - 21 Jan	Aer Lingus	direct
28 Jan - 06 Feb	Aer Lingus	direct
29 Jan - 05 Feb	Aer Lingus	direct
26 Jan - 02 Feb	Aer Lingus	direct
17 Jan - 07 Feb	British Airways
24 Jan - 28 Feb	Aer Lingus	direct
22 Jan - 28 Feb	Aer Lingus	direct

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 361€

Return flights