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

Return flights

01 Apr - 08 Apr	United
14 Apr - 21 Apr	United
15 Apr - 22 Apr	United
07 Apr - 14 Apr	United
08 Apr - 15 Apr	United
29 Apr - 07 May	United
13 Apr - 20 Apr	British Airways
13 Apr - 21 Apr	United
22 Apr - 29 Apr	United
14 Apr - 20 Apr	British Airways
09 Apr - 16 Apr	Icelandair
27 Apr - 01 May	Icelandair
24 Apr - 01 May	Icelandair
23 Apr - 05 May	United
30 Apr - 07 May	British Airways
26 Apr - 03 May	Delta
25 Apr - 02 May	United
26 Apr - 13 May	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 398€

Return flights