Cheapest return flights from Denver to Houston in September from $103

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

Return flights

23 Sep - 07 Oct Frontier Airlines direct
24 Sep - 27 Sep Frontier Airlines direct
23 Sep - 30 Sep Frontier Airlines direct
27 Sep - 27 Sep Frontier Airlines direct
29 Sep - 29 Sep Frontier Airlines direct
22 Sep - 23 Sep Frontier Airlines direct
26 Sep - 29 Sep Frontier Airlines direct
19 Sep - 20 Sep Frontier Airlines
18 Sep - 20 Sep Frontier Airlines
25 Sep - 28 Sep Frontier Airlines
26 Sep - 26 Sep Frontier Airlines

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