Cheapest return flights from Houston to Denver in December from $38

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

Return flights

07 Dec - 09 Dec Frontier Airlines direct
03 Dec - 06 Dec Frontier Airlines direct
03 Dec - 09 Dec Frontier Airlines direct
07 Dec - 07 Dec Frontier Airlines direct
05 Dec - 09 Dec Frontier Airlines direct
09 Dec - 09 Dec Frontier Airlines direct
13 Dec - 15 Dec Frontier Airlines direct
06 Dec - 08 Dec Frontier Airlines direct
04 Dec - 04 Dec Frontier Airlines direct
12 Dec - 14 Dec Frontier Airlines direct
22 Dec - 02 Jan United direct
29 Dec - 02 Jan Frontier Airlines direct
26 Dec - 02 Jan Frontier Airlines direct
20 Dec - 03 Jan Frontier Airlines direct

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

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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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