$44 Cheap Flights from Phoenix (PHX) to Denver (DEN)

View $44 flight on Wed, May 7, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Phoenix to Denver (PHX-DEN)

Prices were available within the past 7 days and start at $44 for one-way flights and $88 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, May 7 - Wed, May 14
PHX
Phoenix
DEN
Denver
$88 Roundtrip, just found
$88
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 7 from Phoenix to Denver, returning Wed, May 14, priced at $88 just found
Frontier Airlines
Wed, Jun 11 - Sat, Jun 21
PHX
Phoenix
DEN
Denver
$97 Roundtrip, found 1 hour ago
$97
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Jun 11 from Phoenix to Denver, returning Sat, Jun 21, priced at $97 found 1 hour ago
Frontier Airlines
Sat, Jul 26 - Tue, Jul 29
PHX
Phoenix
DEN
Denver
$106 Roundtrip, just found
$106
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Jul 26 from Phoenix to Denver, returning Tue, Jul 29, priced at $106 just found
Frontier Airlines
Tue, May 13 - Sun, May 18
PHX
Phoenix
DEN
Denver
$108 Roundtrip, just found
$108
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, May 13 from Phoenix to Denver, returning Sun, May 18, priced at $108 just found
Frontier Airlines
Tue, May 20 - Fri, May 30
PHX
Phoenix
DEN
Denver
$113 Roundtrip, found 1 hour ago
$113
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, May 20 from Phoenix to Denver, returning Fri, May 30, priced at $113 found 1 hour ago
Frontier Airlines
Wed, May 7 - Wed, May 14
PHX
Phoenix
DEN
Denver
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 7 from Phoenix to Denver, returning Wed, May 14, priced at $117 just found
Southwest Airlines
Tue, May 13 - Wed, Jun 25
PHX
Phoenix
DEN
Denver
$135 Roundtrip, found 2 days ago
$135
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, May 13 from Phoenix to Denver, returning Wed, Jun 25, priced at $135 found 2 days ago
American Airlines
Sat, Jul 26 - Tue, Jul 29
PHX
Phoenix
DEN
Denver
$177 Roundtrip, just found
$177
Roundtrip
just found
Select American Airlines flight, departing Sat, Jul 26 from Phoenix to Denver, returning Tue, Jul 29, priced at $177 just found
United
Sat, Jul 26 - Tue, Jul 29
PHX
Phoenix
DEN
Denver
$177 Roundtrip, just found
$177
Roundtrip
just found
Select United flight, departing Sat, Jul 26 from Phoenix to Denver, returning Tue, Jul 29, priced at $177 just found
Contour Airlines
Mon, Jul 7 - Sat, Jul 12
PHX
Phoenix
DEN
Denver
$249 Roundtrip, found 12 hours ago
$249
Roundtrip
found 12 hours ago
Select Contour Airlines flight, departing Mon, Jul 7 from Phoenix to Denver, returning Sat, Jul 12, priced at $249 found 12 hours ago
Flights from Phoenix (PHX) to Denver (DEN)
Origin airport
Sky Harbor Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Contour Airlines, Delta, Frontier Airlines, KEY LIME AIR DBA DENVER AIR CONNECTION, Southwest Airlines, United
Roundtrip price
$82
Distance
601 mi

Phoenix to Denver Flights

The cheapest times to fly from Phoenix to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Denver are during the month of May. You can find some of the cheapest flights from Phoenix to Denver with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Phoenix to Denver

Sunday is one of the best days to book for cheap flights from Phoenix to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Phoenix to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Denver in 2025. You can also book with separate airlines for your outbound and return journeys, from $44 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) cost?
Cheap return fares from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) start from $123. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving PHX on May 13 2025 and touching down at DEN. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from PHX to DEN?
The cheapest flights from PHX to DEN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
Avoid the layovers and travel straight to Denver Intl. Airport (DEN) from Sky Harbor Intl. Airport (PHX) with 4 airlines, including:

  • Southwest Airlines
  • United Airlines
  • Frontier Airlines

What is the cheapest airline that flies from PHX to DEN?
Take off from PHX to DEN with Frontier Airlines. This carrier currently offers the cheapest one-way ticket on this route, starting at $64. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PHX on July 19 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
Every day on average, 26 nonstop flights take off from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). Choose the departure that best suits your travel plans.
What are the most popular departure times for flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
The 10 AM departures from PHX to DEN are typically the busiest. These flights can come with a higher price due to their popularity. If you’re hoping to save money, book during off-peak hours.
What day of the week has the most flights from PHX to DEN?
Sunday has the most flights from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN). Consider jetting off on this day and you’ll have the best chance of finding a departure that fits your itinerary.
What is the earliest flight from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
The earliest flight departing from Sky Harbor Intl. Airport (PHX) is at around 5:00AM UTC-7. Board this plane and you’ll arrive at Denver Intl. Airport (DEN) at approximately 6:53AM UTC-7. The entire trip takes 1h 53m.
How long does it take to fly from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
The average flight duration from PHX to DEN is 1 hour and 51 minutes, covering a total distance of 600 mi.
What airline has the least delays from PHX to DEN?
Consider booking with American Airlines if you’d like to go straight from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) without any delays. This carrier has the strongest track record for punctuality, with an on-time score of 82%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
To avoid potential delays on the Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) route, travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Denver from Sky Harbor Intl. Airport (PHX)?
If you’re boarding a direct flight from Sky Harbor Intl. Airport (PHX) to Denver, Denver Intl. Airport (DEN) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) last-minute?
Last-minute fares from PHX to DEN are typically more expensive. To secure the lowest rates, start searching for flights as early as possible. That being said, if you’re flexible with your travel dates, it’s possible to find a cheap ticket right before you leave.
Is it cheaper to book a PHX to DEN flight and hotel package?
Securing a PHX to DEN flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our impressive range of accommodations and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
Typically, you can modify or cancel your PHX to DEN flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline’s fees and rules on flight changes, or if you’d like further details, go to our Customer Service portal.

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*Available to One Key members.