$45 Cheap Flights from Phoenix (PHX) to Denver (DEN)

View $45 flight on Thu, Sep 25, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)

Today's featured flight deals from Phoenix Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Phoenix to Denver (PHX-DEN)

Prices were available within the past 7 days and start at $45 for one-way flights and $85 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Oct 20 - Thu, Oct 23
PHX
Phoenix
DEN
Denver
$85 Roundtrip, just found
$85
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Oct 20 from Phoenix to Denver, returning Thu, Oct 23, priced at $85 just found
Frontier Airlines
Thu, Sep 25 - Sat, Sep 27
PHX
Phoenix
DEN
Denver
$93 Roundtrip, just found
$93
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Sep 25 from Phoenix to Denver, returning Sat, Sep 27, priced at $93 just found
Frontier Airlines
Fri, Aug 29 - Mon, Sep 1
PHX
Phoenix
DEN
Denver
$99 Roundtrip, just found
$99
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 29 from Phoenix to Denver, returning Mon, Sep 1, priced at $99 just found
Frontier Airlines
Mon, Sep 1 - Thu, Sep 4
PHX
Phoenix
DEN
Denver
$100 Roundtrip, just found
$100
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Sep 1 from Phoenix to Denver, returning Thu, Sep 4, priced at $100 just found
Frontier Airlines
Mon, Oct 13 - Wed, Oct 15
PHX
Phoenix
DEN
Denver
$101 Roundtrip, just found
$101
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Oct 13 from Phoenix to Denver, returning Wed, Oct 15, priced at $101 just found
Frontier Airlines
Sat, Oct 18 - Sat, Oct 25
PHX
Phoenix
DEN
Denver
$103 Roundtrip, found 2 hours ago
$103
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 18 from Phoenix to Denver, returning Sat, Oct 25, priced at $103 found 2 hours ago
United
Tue, Oct 21 - Thu, Oct 30
PHX
Phoenix
DEN
Denver
$116 Roundtrip, just found
$116
Roundtrip
just found
Select United flight, departing Tue, Oct 21 from Phoenix to Denver, returning Thu, Oct 30, priced at $116 just found
Southwest Airlines
Sat, Sep 27 - Wed, Oct 1
PHX
Phoenix
DEN
Denver
$123 Roundtrip, just found
$123
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Sep 27 from Phoenix to Denver, returning Wed, Oct 1, priced at $123 just found
American Airlines
Sat, Sep 27 - Wed, Oct 1
PHX
Phoenix
DEN
Denver
$123 Roundtrip, just found
$123
Roundtrip
just found
Select American Airlines flight, departing Sat, Sep 27 from Phoenix to Denver, returning Wed, Oct 1, priced at $123 just found
Alaska Airlines
Wed, Dec 10 - Sat, Dec 13
PHX
Phoenix
DEN
Denver
$142 Roundtrip, just found
$142
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Dec 10 from Phoenix to Denver, returning Sat, Dec 13, priced at $142 just found

Find the cheapest month to fly from Phoenix (PHX) to Denver (DEN)

September is typically the cheapest month to fly

From $48 - $109 per traveler.

Graph displaying average flight prices per month

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from $129
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from $129
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
$83
Distance
601 mi
Average flight time
2 hours 46 mins

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 October. 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 $45 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?
Snag a cheap one-way flight from $45 or cheap return flight from $85 from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
The cheapest month to fly from PHX to DEN is October, when there's less demand. Off-peak season is generally when better flight deals are available between these airports.
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 Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN)?
American Airlines and Frontier Airlines are some well-known airlines offering reasonable fares. Keep in mind that flight prices from Sky Harbor Intl. Airport (PHX) to Denver Intl. Airport (DEN) can change depending on the time of year, demand and how early you book. With Expedia's search tool, you can easily find a PHX to DEN flight that works with your plans and budget.
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.