Cheapest return flights from Milwaukee to Denver in September from $104

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

Return flights

19 Sep - 21 Sep Frontier Airlines direct
19 Sep - 22 Sep Frontier Airlines direct
08 Sep - 12 Sep Frontier Airlines direct
25 Sep - 29 Sep United direct
28 Sep - 01 Oct American Airlines
25 Sep - 27 Sep American Airlines
25 Sep - 27 Sep United direct
10 Sep - 14 Sep United direct
01 Sep - 04 Sep United direct
04 Sep - 10 Sep American Airlines
04 Sep - 10 Sep United direct
28 Sep - 01 Oct United direct

Also check the deals for one-way flights from Milwaukee to Denver 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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