Cheapest return flights from Phoenix to Denver in December from 35€

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

Return flights

20 Dec - 27 Dec Frontier Airlines direct
20 Dec - 21 Dec Frontier Airlines direct
26 Dec - 31 Dec Frontier Airlines direct
28 Dec - 31 Dec Frontier Airlines direct
26 Dec - 01 Jan Frontier Airlines direct
10 Dec - 16 Dec Frontier Airlines direct
18 Dec - 21 Dec Frontier Airlines direct
03 Dec - 09 Dec Frontier Airlines direct
12 Dec - 21 Dec Frontier Airlines direct
06 Dec - 08 Dec Frontier Airlines direct
04 Dec - 08 Dec Frontier Airlines direct
25 Dec - 02 Jan Frontier Airlines direct
31 Dec - 02 Jan Frontier Airlines direct
18 Dec - 05 Jan Frontier Airlines
18 Dec - 05 Jan Frontier Airlines direct
30 Dec - 01 Jan United direct
28 Dec - 02 Jan United direct

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

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