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$80+ Cheap flights from Philadelphia to Denver (PHL - 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
Mar 25 — Apr 11
Tue 3/25
Tue 4/1
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
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3. Compare prices and book
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Cheapflights Tip: The best prices from Philadelphia to Denver Intl are usually found in May or September, booked 56 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Philadelphia to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) 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 March 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$171
(Southwest)

One-way from

$80
(American Airlines)

Popular in

December

Cheapest in

May

Average price

$335

Good round-trip deal

$253 or less

Good one-way deal

$135 or less
Provider with most accurate pricing for Philadelphia-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Denver Intl flights.
Search Deals
From Philadelphia to Denver Intl
Search Deals
One-way flight from Philadelphia to Denver Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Philadelphia to Denver Intl.
Search Deals
Price to beat on a one-way flight from Philadelphia to Denver Intl.
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Find flight deals from Philadelphia to Denver

Cheapest flights from Philadelphia to Denver
Explore the most affordable flight options available from Philadelphia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2025.

This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/91:35 pmPHL - DEN
Nonstop4h 10mSouthwest
Mon 5/126:05 pmDEN - PHL
Nonstop3h 40mSouthwest
Deal found 3/19$171
This United Airlines deal was found by Cheapflights users on 3/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/83:45 pmPHL - DEN
Nonstop4h 17mUnited Airlines
Wed 4/2311:59 pmDEN - PHL
Nonstop3h 36mUnited Airlines
Deal found 3/19$176
This American Airlines deal was found by Cheapflights users on 3/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/187:55 pmPHL - DEN
Nonstop4h 11mAmerican Airlines
Wed 4/237:00 amDEN - PHL
Nonstop3h 35mAmerican Airlines
Deal found 3/19$181
This Frontier deal was found by Cheapflights users on 3/19. 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 5/213:00 pmPHL - DEN
Nonstop4h 28mFrontier
Wed 5/2811:30 pmDEN - PHL
Nonstop3h 37mFrontier
Deal found 3/19$198
This JetBlue deal was found by Cheapflights users on 3/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:30 amPHL - DEN
1 stop8h 16mJetBlue
Mon 9/1511:35 pmDEN - PHL
1 stop8h 05mJetBlue
Deal found 3/19$209
This Delta deal was found by Cheapflights users on 3/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/35:30 amPHL - DEN
1 stop7h 38mDelta
Sun 4/612:55 amDEN - PHL
1 stop5h 58mDelta
Deal found 3/19$257
This Mytrip deal was found by Cheapflights users on 3/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/123:57 pmPHL - DEN
2 stops21h 33mMultiple Airlines
Thu 8/147:15 pmDEN - PHL
1 stop13h 55mMultiple Airlines
Deal found 3/19$313
This Cheapflightsfares deal was found by Cheapflights users on 3/19. 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 5/3012:09 pmPHL - DEN
1 stop7h 18mSun Country Air
Sun 6/16:30 pmDEN - PHL
1 stop14h 41mSun Country Air
Deal found 3/19$368

Cheapflights Fare Finder

Customize your flight search to find flights from Philadelphia 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 March 20, 2025.
Use the filters below to find and compare flights from Philadelphia to Denver that are best for you.

Fly from

Philadelphia

Fly to

Denver

Route

Depart

Return

Price

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/9

1:35 pm-3:45 pm

Nonstop4h 10m

Denver Intl

Mon 5/12

6:05 pm-11:45 pm

Nonstop3h 40m

$171

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 4/8

3:45 pm-6:02 pm

Nonstop4h 17m

Denver Intl

Wed 4/23

11:59 pm-5:35 am

Nonstop3h 36m

$176

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 4/18

7:55 pm-10:06 pm

Nonstop4h 11m

Denver Intl

Wed 4/23

7:00 am-12:35 pm

Nonstop3h 35m

$181

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 5/21

3:00 pm-5:28 pm

Nonstop4h 28m

Denver Intl

Wed 5/28

11:30 pm-5:07 am

Nonstop3h 37m

$198

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 4/30

6:00 am-12:40 pm

1 stop8h 40m

Denver Intl

Sat 5/3

10:39 pm-9:41 am

1 stop9h 02m

$209

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 4/3

5:30 am-11:08 am

1 stop7h 38m

Denver Intl

Sun 4/6

12:55 am-8:53 am

1 stop5h 58m

$257

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 5/21

3:00 pm-5:28 pm

Nonstop4h 28m

Denver Intl

Sun 6/1

9:26 am-11:05 am

1 stop23h 39m

$283

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/30

12:09 pm-5:27 pm

1 stop7h 18m

Denver Intl

Sun 6/1

6:30 pm-11:11 am

1 stop14h 41m

$368

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 5/28

7:40 pm-9:53 pm

Nonstop4h 13m

$80

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 4/9

5:25 am-7:35 am

Nonstop4h 10m

$81

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 17 results
1
2

Compare providers for flights from Philadelphia to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Denver in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Philadelphia 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 Philadelphia to Denver trip
Airlines
Frontier

Frontier's UpFront Plus seats guarantee an empty middle seat for added comfort.


Frontier offers Zone 1 boarding with a carry-on bag or special fare bundle purchase.

Read more about Frontierby Marisa Garcia
United Airlines

Basic Economy on United allows a personal item only, no carry-on bags without extra fees.


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

Read more about United Airlinesby Harriet Baskas
Southwest

Southwest allows two free checked bags, including oversized items like skis.


Southwest offers free in-flight entertainment streamed to personal devices, including movies and live TV.

Read more about Southwestby Marisa Garcia
Airports
PHL

For a quick check-in at PHL, verify your airline’s terminal before arriving. Terminals are spread out, so plan accordingly.

Read more about PHLby Mark Chesnut
DEN

Use the A Line train for a cost-effective and efficient trip from DEN to downtown Denver. It runs every 15 minutes.

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
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

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 Philadelphia to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Philadelphia 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 Philadelphia to Denver

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

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Denver. Price data was last updated on March 14, 2025.

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Denver (average of $197). Flying from Philadelphia 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 PHL to DEN?

Find hourly flight availability from Philadelphia 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 March 20, 2025.

It’s typically best to fly out from Philadelphia to Denver in the evening. Doing so could potentially save you 51% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Denver. Price data was last updated on March 16, 2025.

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

Weekly flight availability from Philadelphia to Denver

Explore weekly flight availability from Philadelphia 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 March 20, 2025.

The most flights from PHL to DEN are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 March 20, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta from Philadelphia to Denver by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,281 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,753 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,609 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,937 reviews
Southwest
8.1
Very good
4,281 reviews

Boarding

8.2

Comfort

8.1

Overall

8.1

Food

7.1

Entertainment

7.6

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

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

  • What airports do I use to fly from Philadelphia to Denver?

    Booking a flight from Philadelphia (PHL) to Denver Intl (DEN) is your only option if you wish to fly from Philadelphia to Denver. On a typical day, there are 13 flights from Philadelphia to Denver Intl, all of which are around 4h 00m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Philadelphia to Denver.

  • How popular is this Philadelphia to Denver flight route?

    The Philadelphia to Denver Intl flight path was viewed by 159 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Currently priced at $171, Southwest will fly you from Philadelphia to Denver and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $176 and $181, respectively. Southwest is priced at 42% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $80 on American Airlines. Other airlines that offer cheap prices include Southwest from $81 and United Airlines from $88 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Philadelphia to Denver consider choosing Air Canada (88%), United Airlines (88%) or Qatar Airways (85%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Philadelphia to Denver?

    On average you can expect to pay $711 for a flight from Philadelphia to Denver. The cheapest flight overall is $73 while the most popular route, (Philadelphia - Denver Intl) is currently priced at $141.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Philadelphia 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 Philadelphia to Denver?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Denver (average of $197). Flying from Philadelphia 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Westminster
Black Hawk
Lakewood
Winter Park
Broomfield
Cripple Creek
Silverthorne
Golden
Brighton
Greeley
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Central City
Copper Mountain
Longmont
Thornton
Limon
Dillon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Philadelphia to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Vail flights
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Newark to Gunnison flights
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Top 8 airlines flying from Philadelphia to Denver

Discover the top 8 airlines that operate flights from Philadelphia 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 March 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$82Average$275FlexibilityNo cancel feeOn-time83%
FrontierCheapest$87Average$203FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$158Average$238FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$184Average$366FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$185Average$409FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$195Average$353FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$207Average$325FlexibilityNo cancel feeOn-time62%
DeltaCheapest$215Average$333FlexibilityNo cancel feeOn-timeN/A
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