Cheap Flights from Denver to Philadelphia International

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Find the cheapest month or even day of the year to fly to Philadelphia International

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Flight deals from Denver to Philadelphia International Airport

Looking for a cheap last-minute deal or the best return flight from Denver to Philadelphia International Airport? If you want to travel next month, return fares start from R 1,842. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Philadelphia International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to Philadelphia International flights are currently cheapest in May.

Direct flights from Denver to Philadelphia International

Denver to Philadelphia: Flight information

The things to know before you go.
Cheapest flight foundR 919
Cheapest month to flyMay
Average flight time3 hrs, 39 mins
Most popular airlineAmerican Airlines
Average flights per week120

Finding cheap flights from Denver to Philadelphia International: Frequently asked questions

The best price we found for a return flight from Denver to Philadelphia International is R 1,798. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 39 minutes is the average flight time from Denver to Philadelphia International.
American Airlines, Southwest Airlines and United fly direct from Denver to Philadelphia International.
As of March 2026, there are 124 flights per week flying from Denver to Philadelphia International.
The cheapest month to fly from Denver to Philadelphia International is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Philadelphia International Airport on Friday, 1 May 2026.
Yes – the average flight time is 3 hours and 39 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Philadelphia International is Frontier Airlines .

Flying from Denver to Philadelphia International Airport (PHL): What you need to know

  • Your travels get underway at Denver's main airport, Denver International Airport (DEN). Explore your options for catching a flight from Denver to Philadelphia International Airport (PHL) leaving from this base.

  • 3 hours 35 minutes is the average travel time for a direct Denver to Philadelphia International Airport flight.

  • Philadelphia International Airport is located in Philadelphia. The city runs on the UTC-4 timezone and is two hours ahead of Denver.

  • Denver International Airport (DEN) to Philadelphia International Airport (PHL) is the most popular route. There are 50 direct weekly departures to choose from. If you prefer a later start to the day, hop on the last flight with Frontier Airlines at 11:59pm. Choose the first DEN to PHL departure operated by American Airlines at 12:20am if you'd rather not wait around.

  • To ensure you get on your flight from Denver to PHL, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and one hour before domestic flights is the general rule.

  • Peak season means busier airports, so be there even earlier. Give yourself at least two hours before a domestic flight and four hours for international journeys to keep to your schedule.

Airports in Denver

Denver International Airport (DEN)

  • You can book a direct flight from Denver to Philadelphia International Airport (PHL) leaving from Denver International Airport (DEN).

  • Popular airlines that offer direct flights from Denver to Philadelphia International Airport departing DEN include:

  • The preferred airline for passengers flying between DEN and PHL is United Airlines.

  • Among carriers operating on this route, United Airlines has the best record for on-time arrivals.

  • Travelling from central Denver to DEN takes around 1 hour 30 minutes on public transport. If you ride-share, drive or take a cab, you'll cover the 40 kilometres in 35 minutes or so, depending on traffic.

  • Need a convenient place to stay before your flight from Denver to Philadelphia International Airport? Check out Baymont by Wyndham Denver International Airport. Catch some z's here before making your way to Denver International Airport.

  • 80.23% of flights leaving Denver International Airport land at their destination on schedule. With its strong on-time performance, disruptions are unlikely when flying out of DEN.

  • You'll find DEN at 8500 Pena Boulevard.

About Philadelphia International Airport (PHL)

Getting from Philadelphia International Airport (PHL) to central Philadelphia

  • Philadelphia International Airport is about 11 kilometres from central Philadelphia. The time it takes to get there by car hire or cab will depend on the time of day. Do some research before your trip.

  • It'll take around 45 minutes if you're using public transport.

How to find the cheapest flights from Denver to Philadelphia International Airport (PHL)

  • At the moment, R 919 is the best price we've found for a one-way ticket from Denver to Philadelphia International Airport. The cheapest price for a return flight is R 1,798. Remember fares may change due to demand at the time of booking.

  • Booking early is often the key to finding a cheap flight from Denver to PHL. Prices tend to rise as demand increases, so the closer you get to departure, the more it could cost you.

  • If you have some flexibility with your travel plans, use the 'Whole month' tool. It'll give you the lowest price across each month when searching for your Denver to Philadelphia International Airport ticket.

  • There's no need to search every day to find out if fares have dropped when you create a Price Alert. We'll let you know when a lower fare pops up on plane tickets from Denver to PHL.

  • Filters make it easier to land a deal on your flight from Denver to Philadelphia International Airport. Choose the departure times, carriers and stops that line up with your plans. Then sort the results by 'Cheapest' to bring up the lowest fares right away.

The best time to fly from Denver to Philadelphia International Airport (PHL)

  • February is the quietest month for flights from Denver to Philadelphia International Airport (PHL), while August is the busiest. Find the ideal time to go to Philadelphia based on whether you like a laid-back vibe or a lively atmosphere.

  • The warmest month in Philadelphia is July, with temperatures ranging between 18ºC (64ºF) and 32ºC (90ºF). Lock in your Denver to PHL plane ticket then if that's your idea of comfortable weather.

  • January sees temperatures of between -7ºC (19ºF) and 9ºC (48ºF). Search for cheap tickets from Denver to Philadelphia International Airport around that time if you like travelling in cooler conditions.

More about Philadelphia

Explore more of the United States

  • Philadelphia will leave a lasting impression, but there are so many other corners of the United States waiting to be explored. Around 137 kilometres north-east of Philadelphia, a visit to New York will keep your itinerary packed. Start with popular sights like Central Park, Manhattan Skyline and Statue of Liberty.

  • Around 137 kilometres south-west of Philadelphia, Baltimore is another essential stop in the United States. Experience this destination's highlights firsthand at Baltimore Aquarium, National Aquarium and Washington Monument and Mount Vernon Place.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.