Cheapest return flights from Denver to Dublin in September from $545

Best time to book flights for Denver (DEN) to Dublin (DUB) flights at AirHint

AirHint found the following cheapest return flights from Denver (DEN) to Dublin (DUB) in September 2025 (see full year).

Return flights

03 Sep - 17 Sep Icelandair
03 Sep - 25 Sep Icelandair
03 Sep - 17 Sep Aer Lingus direct
03 Sep - 25 Sep Aer Lingus direct
02 Sep - 09 Sep Icelandair
12 Sep - 19 Sep Icelandair
05 Sep - 12 Sep Icelandair
06 Sep - 13 Sep Icelandair
16 Sep - 23 Sep jetBlue
15 Sep - 25 Sep Aer Lingus direct
23 Sep - 05 Oct Icelandair
22 Sep - 10 Oct Icelandair
22 Sep - 10 Oct Aer Lingus direct
24 Sep - 01 Oct British Airways
27 Sep - 04 Oct Icelandair
25 Sep - 02 Oct Icelandair
25 Sep - 02 Oct Aer Lingus direct
27 Sep - 04 Oct Aer Lingus direct

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

Skyscanner

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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