Cheapest return flights from Phoenix to Denver in January from $216

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

Return flights

29 Jan - 05 Feb Frontier Airlines
29 Jan - 05 Feb Frontier Airlines direct
30 Jan - 06 Feb Frontier Airlines direct
30 Jan - 01 Feb Alaska Airlines
31 Jan - 31 Jan Frontier Airlines
31 Jan - 31 Jan Frontier Airlines direct
31 Jan - 01 Feb Frontier Airlines
31 Jan - 01 Feb Frontier Airlines direct
29 Jan - 30 Jan Frontier Airlines
29 Jan - 29 Jan Frontier Airlines
29 Jan - 30 Jan Frontier Airlines direct
29 Jan - 29 Jan Frontier Airlines direct
30 Jan - 02 Feb Frontier Airlines direct

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

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