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Cheap Flights from Philadelphia (PHL) to Denver (DEN)

View AU$242 flight on Thu, 8 Oct 2026Opens in a new window

Popular airlines from Philadelphia International Airport (PHL) to Denver International Airport (DEN)

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Cheap Flights from Philadelphia (PHL) to Denver (DEN)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$460 Return, found 5 days ago
AU$460
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$460 found 5 days ago
American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$474 Return, found 5 days ago
AU$474
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$474 found 5 days ago
Delta
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$488 Return, found 5 days ago
AU$488
Return
found 5 days ago
Select Delta flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$488 found 5 days ago
American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$493 Return, found 5 days ago
AU$493
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$493 found 5 days ago
American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$518 Return, found 5 days ago
AU$518
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$518 found 5 days ago
American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$519 Return, found 5 days ago
AU$519
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$519 found 5 days ago
Delta
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$526 Return, found 5 days ago
AU$526
Return
found 5 days ago
Select Delta flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$526 found 5 days ago
American Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$532 Return, found 5 days ago
AU$532
Return
found 5 days ago
Select American Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$532 found 5 days ago
United
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$584 Return, found 5 days ago
AU$584
Return
found 5 days ago
Select United flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$584 found 5 days ago
Alaska Airlines
Sun, 13 Sept - Tue, 22 Sept
PHL
Philadelphia
DEN
Denver
AU$1,357 Return, found 5 days ago
AU$1,357
Return
found 5 days ago
Select Alaska Airlines flight, departing Sun, 13 Sept from Philadelphia to Denver, returning Tue, 22 Sept, priced at AU$1,357 found 5 days ago

Find the cheapest month to fly from Philadelphia (PHL) to Denver (DEN)

September is typically the cheapest month to fly

From AU$145 - AU$345 per traveller.

Frequently asked questions

How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from AU$242 and cheap return flights from AU$460 PHL to DEN with Expedia. One-way flights typically cost between AU$186 and AU$589. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when PHL to DEN ticket fares go up or down.
What is the cheapest month to fly from Philadelphia, PA (PHL) to Denver, CO (DEN)?
The cheapest months to fly from Philadelphia, PA (PHL) to Denver, CO (DEN) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
There are 4 airlines offering direct flights from Philadelphia Intl. (PHL) to Denver Intl. (DEN). Here are the carriers:
  • United operates 34 direct flights from Philadelphia Intl. to Denver Intl. every week.
  • American Airlines operates 30 direct flights from Philadelphia Intl. to Denver Intl. every week.
  • Southwest Airlines operates 20 direct flights from Philadelphia Intl. to Denver Intl. every week.
  • Frontier Airlines operates 11 direct flights from Philadelphia Intl. to Denver Intl. every week.
How do I find cheap flights from Philadelphia, PA (PHL) to Denver, CO (DEN)?
To find a cheap flight from Philadelphia, PA (PHL) to Denver, CO (DEN), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
The best airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.) will differ from traveler to traveler. If you like to fly early, Frontier Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
The cheapest months to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.) are typically September and January, with average return flights around AU$446. However, the most popular months for this route are November and July, meaning you'll find plenty of flight options during these times. While there isn't a single month that is both the cheapest and most popular, if you're looking for the best value, aiming for September or January could save you some money, while November and July offer the most flexibility with flight schedules.
How many flights per day from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll find approximately 14 nonstop flights per day from Philadelphia International Airport (PHL) to Denver International Airport (DEN). For even more choices, look at flights that include layovers, as there are around 96 connecting flights per day. Some common connection points include O'Hare International (ORD), Midway International (MDW), and Seattle - Tacoma International (SEA).
What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Philadelphia International Airport (PHL) to Denver International Airport (DEN) typically departs around 5:00 AM local time. This flight is operated by American Airlines. This is a seasonal service, active in January and February. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll typically find the most flights from Philadelphia International Airport (PHL) to Denver International Airport (DEN) on a Thursday, with around 98 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Frontier Airlines, and Delta. Flight schedules are quite consistent throughout the week, so you'll have a good selection of flights no matter which day you choose to fly.
What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Philadelphia Intl. (PHL) to Denver Intl. (DEN) are in the early morning, from 6am to 9am. Many major carriers, including Frontier Airlines, American Airlines and United, offer flights during this window. Many travellers prefer these times because it allows for an early arrival at your destination, giving you more time to enjoy your day in Denver.
How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
When flying from Philadelphia International Airport (PHL) to Denver International Airport (DEN), you have a few options for flight duration. A direct, non-stop flight typically takes around 4 hours 13 minutes, covering a distance of approximately 2,501 kilometers. If you opt for a flight with one stop, your travel time will generally be longer, averaging about 9 hours 14 minutes. For flights with two or more stops, you can expect the journey to take around 11 hours 47 minutes. Keep in mind that these are average times, and actual flight durations can vary based on factors like routing, weather conditions, and wind patterns.
Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to Denver, CO (DEN-Denver Intl.)?
You can fly business class or first class between PHL and DEN. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, United, Delta, and American Airlines.
How do I earn miles on a Philadelphia, PA (PHL) to Denver, CO (DEN) flight with Expedia?
It's easy to earn miles on a Philadelphia, PA (PHL) to Denver, CO (DEN) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver, CO (DEN) from Philadelphia, PA (PHL)?
If you're planning to travel to Denver from Philadelphia Intl. (PHL), you can fly directly into Denver Intl. (DEN). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Midway Intl. (MDW), or Portland Intl. (PDX) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Philadelphia, PA (PHL) to Denver, CO (DEN) at the last minute?
Typically, booking a last minute flight from Philadelphia, PA (PHL) to Denver, CO (DEN) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Philadelphia, PA (PHL) to Denver, CO (DEN) flight and hotel package?
Securing a Philadelphia, PA (PHL) to Denver, CO (DEN) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Philadelphia, PA (PHL) to Denver, CO (DEN)?
If you booked your Philadelphia, PA (PHL) to Denver, CO (DEN) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Philadelphia Intl.
Destination airport
Denver Intl.
Roundtrip price
AU$460
Distance
2485 km

Book with confidence

Your quick guide to flights from Philadelphia to Denver

Pick up great flights from Philadelphia to Denver

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Philadelphia to Denver. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Philadelphia to Denver that take around hours.

Find cheap flights from Philadelphia to Denver

From the great flight deals with prices currently ranging from AU$460 to AU$1,357, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Philadelphia to Denver around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Denver is normally in September.

Reasons to book your flight from Philadelphia to Denver with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Philadelphia to Denver across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Denver right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Philadelphia to Denver

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*Available to Expedia members.