−59%Verified fare
PHX → Denver
United States · Frontier · Nonstop
$56 round trip
Usually ~$138 · Nov 2026
Nov 19 → Nov 25 · hotels from ~$125/nightSee it on Google Flights →
Southwest, United, American and Frontier fly nonstop from Phoenix to Denver. The flight takes about 1h 50m.
| From | Phoenix Sky Harbor (PHX) |
|---|---|
| To | Denver International (DEN) |
| Nonstop airlines | Southwest United American Frontier |
| Flight time | About 1h 50m (601 miles) |
| Cheapest month | February (median about $127 round trip) |
| Most expensive | July and June |
| Typical round trip | $124 to $263 (average $183) |
| Best time to book | About 7 weeks ahead |
| Google Flights typical price | About $138 round trip, for the dates we checked recently |
February is usually the cheapest month to fly from Phoenix to Denver, with a median round trip around $127. July and June cost the most, around $237 and $232. Most round trips have cost $124 to $263 (average $183).
Booking about 7 weeks before departure has saved the most on this route, about 46% compared with booking in the last two weeks.
Those are typical prices. Our daily scan looks for fares well below them: when one shows up from PHX, it appears at the top of this page and goes out by email.
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Southwest; United; American; Frontier. Schedules change, so check before booking.
About 1h 50m (601 miles).
February is usually the cheapest month to fly from Phoenix to Denver, with a median round trip around $127. July and June cost the most, around $237 and $232. Most round trips have cost $124 to $263 (average $183).
Booking about 7 weeks before departure has saved the most on this route, about 46% compared with booking in the last two weeks.
Be flexible on dates, compare the nearby airports listed above, and watch for fare drops. Our free newsletter checks fares from PHX every morning and only sends fares at least 20% below the typical price for that route and dates.
Prices are round-trip medians over the past 12 months from KAYAK route data, checked October 2026. Nonstop airlines from Phoenix Sky Harbor and airline schedules as of October 2026. Fares and schedules change, so confirm before you book.