Cheapest return flights from Phoenix to Denver in March from $59

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

Return flights

06 Mar - 08 Mar Frontier Airlines direct
05 Mar - 08 Mar Frontier Airlines direct
26 Mar - 30 Mar Frontier Airlines direct
24 Mar - 28 Mar Frontier Airlines direct
07 Mar - 14 Mar Frontier Airlines
08 Mar - 25 Mar Frontier Airlines direct
14 Mar - 21 Mar Frontier Airlines direct
05 Mar - 14 Mar Frontier Airlines
26 Mar - 29 Mar Frontier Airlines direct
20 Mar - 23 Mar Frontier Airlines direct

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

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