Atlanta to Denver
ATL to DEN
As of 2026-11-11
Cheap Flights from Phoenix (PHX) to Denver (DEN)
- About 602 miles
- About 1.7 hours
- Best months: Jul, Aug, Sep
Looking for cheap flights to Denver from Phoenix? Watch Jul, Aug and Sep for the best odds of a lower fare. The trip from PHX to DEN runs about 1.7 hours, and you can see Denver Botanic Gardens and Larimer Square once you arrive.
Tips for finding a lower fare
- Holiday weekends push fares up. If you can, travel outside them and stay flexible by a few days.
- Sign up for airline fare emails from United; flash sales on Phoenix departures pop up often.
- Allow extra time at PHX during peak travel hours.
Airlines on this route
United, Frontier, Southwest
Things to see in Denver
- Denver Botanic Gardens
- Larimer Square
Frequently asked questions
When is the cheapest time to fly from Phoenix to Denver?
Fares on PHX to DEN are often lower in Jul, Aug and Sep. Prices move with demand, so compare a few dates on the partner site before you decide.
How long is the flight from PHX to DEN?
A nonstop flight takes about 1.7 hours. Itineraries with a connection take longer, depending on the layover.
Which airlines fly from Phoenix to Denver?
Carriers we commonly see on this route include United, Frontier and Southwest. Schedules and availability change, so check current options when you search.
How far ahead should I book PHX to DEN?
For most domestic trips, booking about 1 to 3 months ahead gives a good balance of price and choice. Holiday travel is better booked earlier.
Is the price I see here the final price?
No. Fares shown on this page are indicative and change often. The final price, taxes and fees are shown on the partner site at booking.
Get a custom quote
Tell us about your trip and a travel agent will call or text you with options. This is a request, not a booking, and fares are not guaranteed.
