Cheapest return flights from Denver to Dublin in September from $452

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

Return flights

10 Sep - 24 Sep Air Canada
10 Sep - 17 Sep Air Canada
24 Sep - 01 Oct Aer Lingus direct
15 Sep - 25 Sep Aer Lingus direct
10 Sep - 01 Oct Air France
21 Sep - 02 Oct Aer Lingus direct
10 Sep - 24 Sep Aer Lingus direct
10 Sep - 17 Sep Aer Lingus direct
17 Sep - 23 Sep Delta
11 Sep - 25 Sep Aer Lingus direct
21 Sep - 01 Oct Delta
17 Sep - 01 Oct Delta
22 Sep - 01 Oct SWISS
12 Sep - 26 Sep Iberia
18 Sep - 24 Sep Aer Lingus direct
27 Sep - 01 Oct Aer Lingus direct
29 Sep - 06 Oct Aer Lingus direct
17 Sep - 03 Oct Aer Lingus direct
11 Sep - 15 Sep Aer Lingus direct
15 Sep - 11 Oct Air France

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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