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

Return flights

14 Jan - 24 Jan	Icelandair
12 Jan - 22 Jan	Icelandair
18 Jan - 25 Jan	Icelandair
21 Jan - 31 Jan	Icelandair
11 Jan - 18 Jan	Icelandair
18 Jan - 01 Feb	Icelandair
25 Jan - 08 Feb	Icelandair
25 Jan - 01 Feb	Icelandair
10 Jan - 20 Jan	Air Canada
24 Jan - 03 Feb	Air Canada
12 Jan - 19 Jan	Air Canada
19 Jan - 26 Jan	Air Canada
18 Jan - 28 Jan	Air Canada
23 Jan - 06 Feb	Air Canada
25 Jan - 04 Feb	Air Canada
05 Jan - 19 Jan	British Airways
19 Jan - 02 Feb	British Airways
20 Jan - 03 Feb	British Airways
21 Jan - 04 Feb	Iberia
22 Jan - 05 Feb	Air Canada

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