AirHint found the following cheapest return flights from Denver (DEN) to Phoenix (PHX) in January 2026 (see full year).
Return flights
| 15 Jan - 19 Jan | Frontier Airlines | direct | |
| 09 Jan - 11 Jan | Frontier Airlines | direct | |
| 23 Jan - 26 Jan | Frontier Airlines | direct | |
| 29 Jan - 04 Feb | United | direct | |
| 29 Jan - 02 Feb | American Airlines | direct |
Also check the deals for one-way flights from Denver to Phoenix in January.
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