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

Return flights

09 Jan - 31 Jan	Icelandair
09 Jan - 16 Jan	Icelandair
14 Jan - 21 Jan	Icelandair
19 Jan - 26 Jan	Icelandair
24 Jan - 31 Jan	Icelandair
13 Jan - 20 Jan	Icelandair
26 Jan - 21 Feb	Icelandair
29 Jan - 05 Feb	Icelandair
23 Jan - 31 Jan	Icelandair
19 Jan - 14 Feb	Icelandair
12 Jan - 07 Feb	Icelandair
06 Jan - 22 Jan	British Airways
14 Jan - 21 Jan	Aer Lingus	direct
13 Jan - 20 Jan	Aer Lingus	direct
19 Jan - 14 Feb	Aer Lingus	direct
12 Jan - 07 Feb	Aer Lingus	direct
26 Jan - 21 Feb	Aer Lingus	direct
29 Jan - 05 Feb	Aer Lingus	direct
26 Jan - 02 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 339€

Return flights