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

Return flights

09 Jan - 31 Jan	Icelandair
18 Jan - 25 Jan	Icelandair
19 Jan - 14 Feb	Icelandair
16 Jan - 07 Feb	Icelandair
12 Jan - 07 Feb	Icelandair
15 Jan - 22 Jan	British Airways
05 Jan - 31 Jan	British Airways
26 Jan - 21 Feb	British Airways
13 Jan - 20 Jan	Aer Lingus
28 Jan - 04 Feb	Aer Lingus
08 Jan - 15 Jan	Aer Lingus
03 Jan - 10 Jan	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 353€

Return flights