Cheapest return flights from Denver to Dublin in September from $630

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

08 Sep - 15 Sep Aer Lingus direct
18 Sep - 25 Sep Aer Lingus direct
07 Sep - 14 Sep Aer Lingus direct
14 Sep - 28 Sep British Airways
28 Sep - 05 Oct British Airways
17 Sep - 28 Sep British Airways
03 Sep - 19 Sep jetBlue
06 Sep - 13 Sep Aer Lingus direct
27 Sep - 04 Oct Aer Lingus direct
22 Sep - 02 Oct Icelandair
23 Sep - 02 Oct Icelandair
16 Sep - 25 Sep Icelandair
15 Sep - 25 Sep Icelandair
16 Sep - 24 Sep Icelandair
22 Sep - 03 Oct Aer Lingus direct
22 Sep - 02 Oct Aer Lingus direct
23 Sep - 03 Oct Icelandair

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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