Cheapest return flights from Houston to Denver in December from $66

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

Return flights

16 Dec - 16 Dec Frontier Airlines direct
11 Dec - 13 Dec Frontier Airlines direct
16 Dec - 18 Dec Frontier Airlines direct
09 Dec - 16 Dec Frontier Airlines direct
18 Dec - 24 Dec Frontier Airlines direct
10 Dec - 13 Dec Frontier Airlines direct
09 Dec - 11 Dec Frontier Airlines direct
10 Dec - 12 Dec Frontier Airlines direct
09 Dec - 12 Dec Frontier Airlines direct
13 Dec - 13 Dec Frontier Airlines direct
24 Dec - 04 Jan Frontier Airlines
29 Dec - 02 Jan Frontier Airlines
26 Dec - 06 Jan Frontier Airlines direct
24 Dec - 02 Jan Frontier Airlines
17 Dec - 11 Jan United direct
25 Dec - 01 Jan Frontier Airlines direct
31 Dec - 04 Jan Frontier Airlines direct
24 Dec - 04 Jan Frontier Airlines direct
26 Dec - 05 Jan Frontier Airlines direct
28 Dec - 04 Jan Frontier Airlines

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

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