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

Return flights

20 Apr - 27 Apr	Icelandair
09 Apr - 23 Apr	Icelandair
09 Apr - 16 Apr	Icelandair
17 Apr - 27 Apr	Frontier Airlines
16 Apr - 27 Apr	Icelandair
04 Apr - 30 Apr	Lufthansa
17 Apr - 26 Apr	Frontier Airlines
27 Apr - 04 May	Icelandair
09 Apr - 22 Apr	Icelandair
07 Apr - 22 Apr	Icelandair
24 Apr - 03 May	United
11 Apr - 18 Apr	British Airways
23 Apr - 05 May	United
26 Apr - 16 May	United
30 Apr - 07 May	Icelandair

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 492€

Return flights