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$57+ Cheap flights from Phoenix to Denver (DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — DEN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix to Denver Intl are usually found in February or January, booked 62 days in advance, depart on a Thursday or Friday and return on a Saturday

Cheap flight deals from Phoenix to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Phoenix (PH1) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$88
(Cheapflightsfares)

One-way from

$57
(Cheapflightsfares)

Popular in

June

Cheapest in

February

Average price

$133
From Phoenix to Denver Intl
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One-way flight from Phoenix to Denver Intl
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Highest demand for flights based on searches. 15% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Phoenix to Denver

Cheapest flights from Phoenix to Denver
Explore the most affordable flight options available from Phoenix to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2512:14 pmPHX - DEN
Nonstop2h 01mFrontier
Sun 10/265:18 pmDEN - PHX
Nonstop2h 03mFrontier
Deal found 9/8$88
This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:59 pmPHX - DEN
Nonstop1h 57mFrontier
Wed 10/158:55 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/8$90
This Priceline deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:00 amPHX - DEN
Nonstop1h 55mFrontier
Mon 12/1510:30 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/10$91
This Cheapflightsfares deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:59 pmPHX - DEN
Nonstop1h 56mFrontier
Wed 10/298:58 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/8$92
This Frontier deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/249:59 pmPHX - DEN
Nonstop1h 57mFrontier
Wed 11/52:58 pmDEN - PHX
Nonstop2h 03mFrontier
Deal found 9/8$93
This Cheapflightsfares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/248:00 amPHX - DEN
Nonstop2h 00mFrontier
Wed 10/88:55 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/11$94
This Cheapflightsfares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/812:14 pmPHX - DEN
Nonstop2h 01mFrontier
Sun 10/129:58 pmDEN - PHX
Nonstop1h 57mFrontier
Deal found 9/11$95
This Cheapflightsfares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:07 pmPHX - DEN
Nonstop1h 56mFrontier
Sat 10/48:55 pmDEN - PHX
Nonstop1h 58mFrontier
Deal found 9/11$96
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/97:21 amPHX - DEN
Nonstop1h 57mFrontier
Thu 10/166:55 amDEN - PHX
Nonstop2h 04mFrontier
Deal found 9/10$98
This Frontier deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:20 pmPHX - DEN
Nonstop1h 56mFrontier
Sat 10/43:00 pmDEN - PHX
Nonstop2h 02mFrontier
Deal found 9/9$99
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/254:17 pmPHX - DEN
1 stop6h 30mMultiple Airlines
Sat 11/18:58 pmDEN - PHX
Nonstop2h 00mMultiple Airlines
Deal found 9/9$100
This Cheapflightsfares deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:59 pmPHX - DEN
Nonstop1h 56mFrontier
Sun 10/266:55 amDEN - PHX
Nonstop2h 04mFrontier
Deal found 9/9$101

Cheapflights Fare Finder

 
Customize your flight search to find flights from Phoenix to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Phoenix to Denver that are best for you.

Fly from

Phoenix

Fly to

Denver

Route

Depart

Return

Price

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Fri 10/10

9:59 pm-12:56 am

Nonstop1h 57m

Denver Intl

Mon 10/13

6:55 am-7:59 am

Nonstop2h 04m

$106

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Fri 11/28

4:12 pm-6:07 pm

Nonstop1h 55m

Denver Intl

Tue 12/2

9:05 pm-11:10 pm

Nonstop2h 05m

$107

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Fri 10/17

9:59 pm-12:56 am

Nonstop1h 57m

Denver Intl

Mon 10/20

6:00 am-5:35 pm

1 stop12h 35m

$107

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Thu 10/16

8:30 am-7:19 pm

1 stop9h 49m

Denver Intl

Tue 10/21

5:18 pm-6:21 pm

Nonstop2h 03m

$114

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Wed 12/10

5:25 am-7:10 am

Nonstop1h 45m

Denver Intl

Wed 12/17

2:45 pm-6:40 pm

1 stop3h 55m

$123

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Sat 10/4

11:57 am-7:10 pm

1 stop6h 13m

Denver Intl

Wed 10/8

7:01 am-3:17 pm

1 stop9h 16m

$136

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Sat 10/4

4:17 pm-11:47 pm

1 stop6h 30m

Denver Intl

Tue 10/7

7:50 pm-9:44 am

1 stop14h 54m

$136

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 10/7

11:57 am-7:10 pm

1 stop6h 13m

Denver Intl

Tue 10/14

7:01 am-3:17 pm

1 stop9h 16m

$136

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 10/7

4:17 pm-11:47 pm

1 stop6h 30m

Denver Intl

Tue 10/21

3:00 pm-10:39 pm

1 stop8h 39m

$136

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Wed 12/3

10:30 am-12:20 pm

Nonstop1h 50m

Denver Intl

Mon 12/8

8:00 am-11:25 am

1 stop3h 25m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 19 results
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Best time to book a flight from Phoenix to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Phoenix with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Phoenix to Denver

How far ahead should I book a flight from Phoenix to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Phoenix to Denver. Price data was last updated on August 29, 2025.

The price you pay for your flight from Phoenix to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 62 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Phoenix to Denver?

Currently, October is the cheapest month in which you can book a flight from Phoenix to Denver (average of $197). Flying from Phoenix to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHX to DEN?

Find hourly flight availability from Phoenix to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from Phoenix to Denver in the evening. By choosing this option you can save up to 60% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Phoenix to Denver?

Use this chart to determine the cheapest time to fly round-trip from Phoenix to Denver. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Phoenix to Denver flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Phoenix to Denver

Explore weekly flight availability from Phoenix to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from PH1 to DEN are scheduled on a Thursday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

How much does it cost to fly round-trip from Phoenix to Denver?

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Phoenix to Denver, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Phoenix to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Phoenix?

    Located just 18.5 mi from the city center, Denver Intl is the airport most travelers will use when flying to Denver from Phoenix. Booking flights from Phoenix to Denver Intl (DEN) should be relatively easy as there are 27 daily inbound flights from Phoenix from 4 different airlines.

  • How long is the flight from Phoenix to Denver?

    Frontier and Southwest can get you from Phoenix to Denver in just under 1h 45m. Your travel time will be generally consistent. There are 601 mi between Phoenix and Denver. Most flights are nonstop.

  • What are the cheapest airlines flying from Phoenix to Denver round-trip?

    Flying on Frontier is currently your cheapest option to Denver, with prices starting at $63. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $137 and $146, respectively. Frontier is priced at 60% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Phoenix to Denver one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $64. Users have also found prices from $66 and $68 on Frontier and Alaska Airlines, respectively.

  • What are the most reliable airlines from Phoenix to Denver?

    The top 3 most reliable airlines when flying from Phoenix to Denver are Air Canada (78%), Lufthansa (75%) and Alaska Airlines (68%).

  • What are the cheapest flights from Phoenix to Denver?

    The cheapest flight price from Phoenix to Denver is $70. On average you can expect to pay $723. The most popular route, (Phoenix Sky Harbor Intl - Denver Intl), can usually be booked for $73.

  • Can I find deals for flights from Phoenix to Denver that include hotel bookings?

    Yes. In addition to deals on Phoenix to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Phoenix to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Phoenix to Denver.

  • Can I find deals for business class flights from Phoenix to Denver?

    Yes. Cheapflights offers flight deals from Phoenix to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Phoenix to Denver?

    Currently, October is the cheapest month in which you can book a flight from Phoenix to Denver (average of $197). Flying from Phoenix to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Black Hawk
Golden
Winter Park
Broomfield
Greeley
Lone Tree
Lakewood
Cripple Creek
Thornton
Silverthorne
Frisco
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Phoenix to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Phoenix to Denver

Discover the top 4 airlines that operate flights from Phoenix to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$63Average$143FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$137Average$222FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$146Average$234FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$157Average$343FlexibilityNo cancel feeOn-time69%

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