A historic building with a clock tower, surrounded by trees and street lamps.

$84 Cheap Flights from Denver (DEN) to Philadelphia (PHL)

View $84 flight on Sat, Oct 24, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Philadelphia Intl. Airport (PHL)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Denver to Philadelphia (DEN-PHL)

Prices were available within the past 7 days and start at $84 for one-way flights and $168 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Oct 20 - Sat, Oct 24
DEN
Denver
PHL
Philadelphia
$168 Roundtrip, found 2 hours ago
$168
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Tue, Oct 20 from Denver to Philadelphia, returning Sat, Oct 24, priced at $168 found 2 hours ago
Frontier Airlines
Thu, Oct 15 - Sat, Oct 24
DEN
Denver
PHL
Philadelphia
$190 Roundtrip, just found
$190
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 15 from Denver to Philadelphia, returning Sat, Oct 24, priced at $190 just found
Frontier Airlines
Thu, Oct 15 - Sat, Oct 24
DEN
Denver
PHL
Philadelphia
$195 Roundtrip, just found
$195
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 15 from Denver to Philadelphia, returning Sat, Oct 24, priced at $195 just found
Frontier Airlines
Fri, Oct 16 - Tue, Oct 20
DEN
Denver
PHL
Philadelphia
$202 Roundtrip, just found
$202
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Oct 16 from Denver to Philadelphia, returning Tue, Oct 20, priced at $202 just found
Frontier Airlines
Tue, Oct 20 - Mon, Oct 26
DEN
Denver
PHL
Philadelphia
$205 Roundtrip, found 1 hour ago
$205
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Oct 20 from Denver to Philadelphia, returning Mon, Oct 26, priced at $205 found 1 hour ago
Frontier Airlines
Fri, Oct 16 - Tue, Oct 20
DEN
Denver
PHL
Philadelphia
$207 Roundtrip, just found
$207
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Oct 16 from Denver to Philadelphia, returning Tue, Oct 20, priced at $207 just found
Southwest Airlines
Thu, Oct 15 - Tue, Oct 20
DEN
Denver
PHL
Philadelphia
$215 Roundtrip, found 1 day ago
$215
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Thu, Oct 15 from Denver to Philadelphia, returning Tue, Oct 20, priced at $215 found 1 day ago
United
Tue, Sep 22 - Tue, Sep 29
DEN
Denver
PHL
Philadelphia
$321 Roundtrip, just found
$321
Roundtrip
just found
Select United flight, departing Tue, Sep 22 from Denver to Philadelphia, returning Tue, Sep 29, priced at $321 just found
Delta
Sat, Oct 10 - Mon, Oct 19
DEN
Denver
PHL
Philadelphia
$341 Roundtrip, just found
$341
Roundtrip
just found
Select Delta flight, departing Sat, Oct 10 from Denver to Philadelphia, returning Mon, Oct 19, priced at $341 just found
JetBlue Airways
Fri, Nov 6 - Tue, Nov 10
DEN
Denver
PHL
Philadelphia
$377 Roundtrip, just found
$377
Roundtrip
just found
Select JetBlue Airways flight, departing Fri, Nov 6 from Denver to Philadelphia, returning Tue, Nov 10, priced at $377 just found

Alternative airports near Philadelphia

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

Select flight to New Castle ILG. Average driving time to city center is 44 minutes. Flights from $390
ILG
New Castle
Average driving time to city center44 min
Flights from $390

What you need to know for your flight from Denver Intl. to Philadelphia Intl.

Denver (DEN) to Philadelphia (PHL) at a glance

Travel from Denver (DEN) to Philadelphia (PHL) with a range of airlines offering this domestic short-haul route. You can explore various options, including full-service and low-cost carriers, to discover cheap fares from Denver that suit your budget and schedule. With multiple weekly flights available, you’ll find an itinerary that fits your travel plans perfectly as you prepare to experience the iconic sights and vibrant neighborhoods of Philadelphia.

  • Fastest flight duration: around 3h 30m non-stop
  • Route distance: roughly 1,600 miles (2,570 km)
  • Flights per week: around 50+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $80–$445, depending on seasonality and how far ahead you book

Flights from Denver International Airport (DEN) to Philadelphia International Airport (PHL)

Based on recent traveler bookings, here are the top airlines flying from Denver to Philadelphia, favored for both non-stop and one-stop options. Common layover spots include Hartsfield-Jackson Atlanta International Airport (ATL) with a layover of about 1 hour and 45 minutes, Orlando International Airport (MCO) also with roughly 1 hour and 45 minutes, and Dallas-Fort Worth International Airport (DFW) with an approximate layover of 2 hours and 45 minutes. These choices provide the flexibility to balance price, total travel time, and cabin class, helping you find the ideal itinerary.

  • American Airlines: This full-service airline provides both non-stop and one-stop options, with one-way ticket prices generally falling between $85 and $445. It represents about 30% of departures on this route, with a standard non-stop flight duration of 3 hours and 30 minutes.
  • United: Another full-service option, United offers non-stop and one-stop services, with one-way fares typically ranging from $85 to $515. It makes up roughly 26% of departures for this route, maintaining an average non-stop travel time of 3 hours and 30 minutes.
  • Southwest Airlines: A budget-friendly carrier, Southwest Airlines provides both non-stop and one-stop flights, with fares usually between $80 and $475 for one-way journeys. This airline accounts for around 21% of departures on this route, with a typical non-stop travel duration of 3 hours and 30 minutes.
  • Frontier Airlines: Known for its low-cost offerings, Frontier Airlines offers non-stop and one-stop services, with one-way fares typically ranging from $80 to $280. It contributes about 18% of the departures on this route, with a usual non-stop journey time of 3 hours and 30 minutes.
  • Delta: Delta operates one-stop service on this route, with one-way fares generally falling between $120 and $535. It accounts for approximately 3% of departures, featuring an in-flight time of 5 hours and 15 minutes and a total travel duration of about 7 hours and 15 minutes, including layover time.

Travelers have the option to upgrade their flight from Denver to Philadelphia with several leading airlines. American Airlines provides first-class service, while United and Delta both offer first class and premium economy class options, ensuring a comfortable journey tailored to your needs.

Best time to fly from Denver (DEN) to Philadelphia (PHL)

The most popular months for travelers flying from Denver to Philadelphia are March, April, and July, when peak temperatures in Philadelphia reach up to 78.3°F in July. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 69.8°F and typically the lowest average one-way fare (around $185). Flight availability peaks in June and July, with approximately 67 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 40 flights per week.

  • Cheapest time to fly: September usually offers good deals with average one-way fare around $185, roughly 10% cheaper than the yearly average.
  • More budget-friendly months to fly: August, July, and May typically offer average one-way fares of around $193.
  • Most flight options: June and July have the highest number of flights from Denver to Philadelphia, with approximately 67 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January33.3°F (0.7°C)Average40$222
February35.4°F (1.9°C)Average42$212
March43.0°F (6.1°C)Slightly High49$230
April53.6°F (12.0°C)Slightly High51$212
May63.5°F (17.5°C)Average61$195
June72.1°F (22.3°C)Average67$205
July78.3°F (25.7°C)Slightly High67$192
August76.3°F (24.6°C)Average63$191
September69.8°F (21.0°C)Slightly Low64$185
October58.8°F (14.9°C)Average60$202
November46.9°F (8.3°C)Slightly Low52$218
December39.4°F (4.1°C)Slightly Low49$218

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Denver (DEN) to Philadelphia (PHL)

  • Colorado Springs to Philadelphia (COS-PHL): Located approximately 73 miles from Denver International Airport (DEN), Colorado Springs Airport (COS) offers one-way economy tickets that generally range from $130 to $495, influenced by the time of year and booking period. This route is primarily served by one-stop flights, with common layovers at Denver International Airport (DEN) and Dallas-Fort Worth International Airport (DFW). Major airlines operating on this route include American Airlines and the budget-friendly Southwest Airlines. First-class service is also an option on this journey.
  • Denver to Trenton (DEN-TTN): Mercer Airport (TTN), situated about 36 miles from Philadelphia International Airport (PHL), features one-way economy fares typically between $70 and $235, with variations based on seasonality and advance booking. This route is usually offered with one-stop flights, frequently connecting through Tampa International Airport (TPA) and Orlando International Airport (MCO). Frontier Airlines, a low-cost option, and American Airlines are the leading carriers for this route.

How to find the best prices for flights from Denver (DEN) to Philadelphia (PHL)

Getting some of the best deals on flights from Denver to Philadelphia is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are typically found when booking 2-8 weeks in advance, which coincides with when most travelers make their reservations. Evening departures (6 PM-12 AM) often offer lower prices, while morning flights (5 AM-12 PM) are the most popular. Additionally, flying on Wednesday generally provides cheaper rates, although Thursday is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Philadelphia International Airport from Denver International Airport

Philadelphia welcomes travelers from Denver with a range of transport options based on price, convenience, and proximity. Here's how to reach Philadelphia efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Philadelphia, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Philadelphia International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Philadelphia International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Philadelphia International Airport, the PHL Airport Terminals C & D Station, a metro station, is located about 0.1 miles away on foot, while the Philadelphia International Airport Terminal B Station, a train station, is about 0.2 miles away on foot. For those looking to reach the waterfront, the Philadelphia Seaport, a seaport, is situated approximately 8.4 miles from the airport by car.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) cost?
You can find cheap one-way flights from $84 and cheap return flights from $168 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) with Expedia. One-way flights usually range from $131 to $884, and return flights typically cost between $302 and $1741. 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The cheapest month to fly from DEN to PHL is October 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're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Choose from 3 airlines operating direct flights from DEN to PHL:

  • United operates around 27 direct flights from DEN to PHL every week
  • American Airlines operates around 24 direct flights from DEN to PHL every week
  • Frontier Airlines operates around 7 direct flights from DEN to PHL every week

What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
United is one of the cheapest airlines offering nonstop flights from Denver, CO (DEN) to Philadelphia, PA (PHL), with round-trip tickets starting from around $236. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.), 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. American Airlines offers the most daily flights from DEN to PHL, 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
On average, there are around 10 nonstop flights per day from Denver Intl. (DEN) to Philadelphia Intl. (PHL). For more options, look at flights that include layovers.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from DEN to PHL. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The most popular departure times for flights from Denver (DEN) to Philadelphia (PHL) are in the early morning, from 6am to 9am. About 27% of passengers prefer this time window. Many major carriers, including American Airlines and Delta Air Lines, offer flights during this window. This timing is popular because it allows you to maximize your time in Philadelphia upon arrival.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Flying nonstop from DEN to PHL takes around 3 hours 30 minutes, with the route covering approximately 1,554 miles. Flights with a layover typically take 4 hours 20 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
First class is available on flights from DEN to PHL. First class cabins are available on:

  • Delta Air Lines
  • American Airlines
  • United Airlines

How much is a business class flight from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
A direct, return business class ticket from Denver (DEN) to Philadelphia (PHL) typically costs between $1,308 - $1,960. A non-stop, one-way business class flight is usually around $699 - $908 per adult. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) 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 Philadelphia from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Philadelphia Intl. (PHL) to reach Philadelphia. Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), Eppley Field (OMA) before reaching Philadelphia. 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) Philadelphia Vacation Packages 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 Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Philadelphia, PA (PHL-Philadelphia Intl.) 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

Origin airport
Denver Intl.
Destination airport
Philadelphia Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$168
Distance
1553 mi
Average flight time
5 hours 35 mins

Book with confidence

Denver to Philadelphia Flights

The cheapest times to fly from Denver to Philadelphia

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 Denver to Philadelphia are during the month of October. You can find some of the cheapest flights from Denver to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Philadelphia

Sunday is one of the best days to book for cheap flights from Denver to Philadelphia: 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 Denver to Philadelphia

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 Denver to Philadelphia in 2026. You can also book with separate airlines for your outbound and return journeys, from $84 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 Denver to Philadelphia 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 Denver to Philadelphia 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.

 

Denver to Philadelphia Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia