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

Return flights

29 Jan - 04 Feb	TAP
30 Jan - 03 Feb	TAP
19 Jan - 26 Jan	TAP
19 Jan - 25 Jan	Scandinavian Airlines
26 Jan - 02 Feb	Scandinavian Airlines
17 Jan - 23 Jan	Scandinavian Airlines
11 Jan - 20 Jan	Lufthansa
18 Jan - 25 Jan	TAP
22 Jan - 29 Jan	Icelandair
20 Jan - 27 Jan	Icelandair
28 Jan - 04 Feb	Icelandair
18 Jan - 24 Jan	Icelandair
24 Jan - 31 Jan	Icelandair
21 Jan - 28 Jan	Aer Lingus	direct
28 Jan - 04 Feb	Aer Lingus	direct
29 Jan - 04 Feb	Aer Lingus	direct
30 Jan - 03 Feb	Aer Lingus	direct
30 Jan - 06 Feb	Aer Lingus	direct
23 Jan - 19 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 414€

Return flights