Cheapest return flights from Phoenix to Denver in January from $55

AirHint found the following cheapest return flights from Phoenix (PHX) to Denver (DEN) in January 2026 (see full year).

Return flights

09 Jan - 11 Jan Frontier Airlines direct
10 Jan - 12 Jan Frontier Airlines direct
09 Jan - 12 Jan Frontier Airlines direct
19 Jan - 23 Jan Frontier Airlines direct
01 Jan - 08 Jan Frontier Airlines direct
23 Jan - 25 Jan Frontier Airlines direct
11 Jan - 15 Jan Frontier Airlines direct
11 Jan - 17 Jan Frontier Airlines direct
11 Jan - 13 Jan Frontier Airlines direct
16 Jan - 30 Jan Frontier Airlines direct

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

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