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$59+ Cheap flights from Sky Harbor Intl (PHX) 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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — DEN
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl 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 Sky Harbor Intl to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) 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 16, 2025.

Round-trip from

$86
(Cheapflightsfares)

One-way from

$59
(Frontier)

Popular in

June

Cheapest in

February

Average price

$152

Good round-trip deal

$154 or less

Good one-way deal

$109 or less
From Phoenix Sky Harbor Intl to Denver Intl
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One-way flight from Phoenix Sky Harbor Intl to Denver Intl
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Highest demand for flights based on searches. 14% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% 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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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Denver Intl.
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Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Denver Intl.
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Find flight deals from Sky Harbor Intl to Denver

Cheapest flights from Sky Harbor Intl to Denver
Explore the most affordable flight options available from Sky Harbor Intl to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:00 amPHX - DEN
Nonstop2h 00mFrontier
Tue 9/308:55 pmDEN - PHX
Nonstop1h 58mFrontier
Deal found 9/15$86
This Frontier deal was found by Cheapflights users on 9/15. 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.
Wed 11/56:11 pmPHX - DEN
Nonstop1h 53mFrontier
Fri 11/710:29 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/15$87
This Frontier deal was found by Cheapflights users on 9/14. 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
Sun 10/56:30 amDEN - PHX
Nonstop2h 02mFrontier
Deal found 9/14$88
This Frontier deal was found by Cheapflights users on 9/15. 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 10/179:59 pmPHX - DEN
Nonstop1h 57mFrontier
Sun 10/196:55 amDEN - PHX
Nonstop2h 04mFrontier
Deal found 9/15$89
This Frontier deal was found by Cheapflights users on 9/14. 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.
Sun 10/56:00 amPHX - DEN
Nonstop1h 58mFrontier
Wed 10/85:18 pmDEN - PHX
Nonstop2h 03mFrontier
Deal found 9/14$90
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:00 amPHX - DEN
Nonstop2h 00mFrontier
Wed 10/82:01 pmDEN - PHX
Nonstop2h 03mFrontier
Deal found 9/14$91
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 10/179:59 pmPHX - DEN
Nonstop1h 57mFrontier
Wed 10/2210:10 amDEN - PHX
Nonstop2h 04mFrontier
Deal found 9/16$92
This Frontier deal was found by Cheapflights users on 9/14. 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.
Sat 10/48:00 amPHX - DEN
Nonstop2h 00mFrontier
Mon 10/67:00 amDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/14$93
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/137:59 pmPHX - DEN
Nonstop1h 56mFrontier
Wed 10/158:55 pmDEN - PHX
Nonstop2h 00mFrontier
Deal found 9/16$94
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Tue 9/238:00 amPHX - DEN
Nonstop2h 00mFrontier
Sun 10/196:55 amDEN - PHX
Nonstop2h 04mFrontier
Deal found 9/14$95
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:05 amPHX - DEN
Nonstop1h 58mFrontier
Mon 10/69:58 pmDEN - PHX
Nonstop1h 56mFrontier
Deal found 9/14$96
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 9/278:55 amPHX - DEN
Nonstop2h 00mFrontier
Sat 10/43:00 pmDEN - PHX
Nonstop2h 02mFrontier
Deal found 9/14$99

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sky Harbor Intl 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 16, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Denver that are best for you.

Fly from

Sky Harbor Intl

Fly to

Denver

Route

Depart

Return

Price

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Sat 10/18

4:14 pm-7:10 pm

Nonstop1h 56m

Denver Intl

Wed 10/22

8:55 pm-9:55 pm

Nonstop2h 00m

$119

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 10/28

11:38 am-11:10 am

1 stop22h 32m

Denver Intl

Thu 10/30

10:29 pm-3:27 pm

1 stop17h 58m

$143

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Thu 11/20

1:30 pm-5:45 pm

1 stop4h 15m

Denver Intl

Tue 12/2

5:30 am-7:35 am

Nonstop2h 05m

$158

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 12/2

4:55 pm-9:35 pm

1 stop4h 40m

Denver Intl

Thu 12/4

8:00 am-11:25 am

1 stop3h 25m

$172

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Mon 11/24

7:45 pm-9:30 pm

Nonstop1h 45m

Denver Intl

Fri 11/28

1:00 pm-2:55 pm

Nonstop1h 55m

$178

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Sat 9/20

5:07 pm-8:03 pm

Nonstop1h 56m

Denver Intl

Thu 9/25

12:59 am-11:32 am

1 stop11h 33m

$186

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Thu 12/11

7:00 am-11:10 am

1 stop4h 10m

Denver Intl

Wed 12/17

7:28 pm-12:31 am

1 stop5h 03m

$197

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 10/7

10:05 am-6:24 pm

1 stop7h 19m

Denver Intl

Wed 10/8

7:19 pm-11:13 pm

1 stop4h 54m

$197

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Thu 12/11

1:13 pm-6:31 pm

1 stop5h 18m

Denver Intl

Mon 1/5

6:25 pm-11:54 pm

1 stop5h 29m

$197

PhoenixDenver

PHX - DEN

PHXDEN

Phoenix Sky Harbor Intl

Tue 10/14

6:00 am-8:51 am

Nonstop1h 51m

$69

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 19 results
1
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The best insider tips for Phoenix Sky Harbor Intl Airport to Denver flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to Denver trip
Airlines
Frontier

Frontier's UpFront Plus offers a guaranteed empty middle seat for added comfort.


Frontier's Zone 1 boarding is available with a carry-on or special fare bundle.

Read more about Frontierby Marisa Garcia
Southwest

Enjoy free snacks and non-alcoholic drinks, with alcoholic options available for purchase onboard.


Benefit from free messaging and high-speed Wi-Fi for a fee on Southwest flights.

Read more about Southwestby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom seats towards the front of the economy cabin.


United's MileagePlus allows pooling miles for family or friends' tickets.

Read more about United Airlinesby Harriet Baskas
Airports
PHX

PHX offers short security lines with wait times often under 10 minutes. Check live wait times online to choose the shortest lane.

Read more about PHXby Brandon Schultz
DEN

Take the A Line train from DEN to Union Station in 37 minutes. It runs every 15 minutes and offers mobile ticketing.

Read more about DENby Emily Zemler
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Brandon Schultz

Brandon Schultz

Expert on PHX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Sky Harbor Intl to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Sky Harbor Intl 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 Sky Harbor Intl Airport to Denver

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to Denver. Price data was last updated on September 12, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Denver is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Denver?

Currently, October is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Denver (average of $197). Flying from Phoenix Sky Harbor Intl Airport 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 Sky Harbor Intl 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 16, 2025.

It’s optimal to fly from Phoenix Sky Harbor Intl Airport to Denver in the evening. By choosing this option you can save up to 61% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to Denver?

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Denver. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport 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.

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 16, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Phoenix Sky Harbor Intl Airport to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

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 Sky Harbor Intl 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 Sky Harbor Intl?

    Located just 18.5 mi from the city center, Denver Intl is the airport most travelers will use when flying to Denver from Phoenix Sky Harbor Intl. Booking flights from Phoenix Sky Harbor Intl to Denver Intl (DEN) should be relatively easy as there are 25 daily inbound flights from Phoenix Sky Harbor Intl from 4 different airlines.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Denver?

    Airlines like Frontier and Southwest fly from Phoenix Sky Harbor Intl Airport to Denver in about 1h 56m. The time it takes to get you to your destination can typically vary by up to 2h 19m. The distance between Phoenix Sky Harbor Intl Airport and Denver is about 601 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to Denver round-trip?

    Frontier, at $64, was found to be the cheapest airline from Phoenix Sky Harbor Intl Airport to Denver.Alternate airlines to your destination round-trip include American Airlines and Southwest. Frontier is priced at 60% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Denver?

    No one likes to see their flight delayed. When booking a flight from Phoenix Sky Harbor Intl Airport to Denver consider choosing Envoy Air (88%), Air Canada (81%) or Lufthansa (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Denver?

    The cheapest flight price from Phoenix Sky Harbor Intl Airport to Denver is $71. On average you can expect to pay $680. The most popular route, (Phoenix Sky Harbor Intl - Denver Intl), can usually be booked for $113.

  • Can I find deals for flights from Sky Harbor Intl to Denver that include hotel bookings?

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

  • How can I find direct flights from Sky Harbor Intl to Denver?

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

  • Can I find deals for business class flights from Sky Harbor Intl to Denver?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl 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 Sky Harbor Intl Airport to Denver?

    Currently, October is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Denver (average of $197). Flying from Phoenix Sky Harbor Intl Airport 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
Black Hawk
Westminster
Golden
Winter Park
Lakewood
Broomfield
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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Top 4 airlines flying from Sky Harbor Intl to Denver

Discover the top 4 airlines that operate flights from Sky Harbor Intl 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$64Average$139FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$137Average$222FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$146Average$234FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$156Average$279FlexibilityNo cancel feeOn-time69%

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