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

Return flights

23 Apr - 05 May	Icelandair
25 Apr - 16 May	Icelandair
14 Apr - 21 Apr	United
12 Apr - 22 Apr	Air Canada
02 Apr - 09 Apr	Icelandair
24 Apr - 01 May	Icelandair
03 Apr - 10 Apr	United
05 Apr - 12 Apr	Air Canada
29 Apr - 06 May	Aer Lingus
04 Apr - 11 Apr	United
10 Apr - 19 Apr	Delta
19 Apr - 26 Apr	Aer Lingus

Also check the deals for one-way flights from Denver to Dublin in April.

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 April from $467

Return flights