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

Return flights

14 Jan - 25 Jan	Icelandair
18 Jan - 25 Jan	Icelandair
12 Jan - 18 Jan	Icelandair
28 Jan - 14 Feb	Icelandair
14 Jan - 26 Jan	British Airways
11 Jan - 18 Jan	Icelandair
23 Jan - 30 Jan	Lufthansa
15 Jan - 22 Jan	Lufthansa
15 Jan - 27 Jan	Lufthansa
15 Jan - 20 Jan	British Airways
06 Jan - 13 Jan	Icelandair
27 Jan - 03 Feb	Aer Lingus
30 Jan - 06 Feb	Aer Lingus

Also check the deals for one-way flights from Denver 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 Denver to Dublin in January from 327€

Return flights