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

Return flights

30 Jun - 25 Jul	Air Canada
07 Jun - 24 Jun	Aer Lingus	direct
22 Jun - 06 Jul	Air Canada
13 Jun - 20 Jun	Aer Lingus	direct
11 Jun - 25 Jun	Iberia
08 Jun - 22 Jun	SWISS
25 Jun - 09 Jul	Iberia
26 Jun - 10 Jul	SWISS
26 Jun - 10 Jul	Aer Lingus	direct
15 Jun - 11 Jul	Aer Lingus	direct
17 Jun - 11 Jul	Aer Lingus	direct
06 Jun - 23 Jun	United
06 Jun - 27 Jun	Air Canada
06 Jun - 27 Jun	Aer Lingus	direct
08 Jun - 22 Jun	Aer Lingus	direct
22 Jun - 06 Jul	Aer Lingus	direct

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

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 June from $709

Return flights