Cheap Flights from Denver International to Philadelphia International

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Compare Denver International to Philadelphia International flight deals

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Flight deals from Denver International to Philadelphia International

Looking for a cheap last-minute deal or the best return flight from Denver International to Philadelphia International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver International to Philadelphia International

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

Direct flights from Denver International to Philadelphia International

Denver International to Philadelphia International: Alternative routes

Compare routes from Denver International to Philadelphia below. You may find an airport to fly into that's cheaper, faster, or easier than Philadelphia International.

Denver to Philadelphia: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 3,329
Cheapest month to flyJune
Average flight time3 hrs, 37 mins
Most popular airlineSouthwest Airlines
Average flights per week141

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

The best price we found for a return flight from Denver International to Philadelphia International is ج.م.‏ 6,896. 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 37 minutes is the average flight time from Denver International to Philadelphia International.
Southwest Airlines, United and American Airlines fly direct from Denver International to Philadelphia International.
As of May 2025, there are 141 flights per week flying from Denver International to Philadelphia International.
The cheapest month to fly from Denver International to Philadelphia International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Philadelphia International Airport on Thursday, 10 July 2025.
Yes – the average flight time is 3 hours and 37 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.
Currently, Frontier Airlines offers the cheapest flight tickets to Philadelphia International.

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

  • Around 3 hours 35 minutes is how long you'll be travelling on a direct flight from Denver International Airport to Philadelphia International Airport.

  • Philadelphia's timezone is UTC-4, which makes Philadelphia two hours ahead of Denver.

  • Choose from 74 weekly Denver International Airport to Philadelphia International Airport flights. The 06:05 departure with Frontier Airlines is the earliest flight you can take. Frontier Airlines operates the latest service of the day at 23:59.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for stress-free travel. Be at the airport with enough time to catch your DEN to PHL flight.

  • You can expect bigger queues during popular months such as July. Arriving up to four hours ahead of international flights and two hours for a domestic departure is a good idea.

  • A number of airlines operate direct flights from Denver International Airport to Philadelphia International Airport, so jetting to Philadelphia (and then seeing more parts of United States!) is easy. Leading carriers that fly nonstop include:

  • The majority of travellers choose to fly with American Airlines on this route.

  • With a dependable 84.0% of services arriving as planned, United Airlines is the most punctual carrier offering DEN to PHL flights.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Denver International Airport to Philadelphia International Airport, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to visit the city of your choice. Stopovers between DEN and PHL include:

    • Minneapolis-St. Paul International Airport

    • Kansas City International Airport

    • John Glenn Columbus International Airport

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

  • The lowest price we've found for a one-way Denver International Airport to Philadelphia International Airport flight is ج.م.‏ 3,306. A return plane ticket is currently ج.م.‏ 6,946. Depending on the availability when you book, these fares can change.

  • Get cheap tickets from DEN to PHL by booking six months ahead. Based on our research, that's the sweet spot for finding the biggest deals.

  • May is the cheapest month for flights from Denver International Airport to Philadelphia International Airport. If you prefer to fly at a different time of year, the 'Whole month' tool will give you the lowest airfares for every month.

  • Getting your hands on cheap flights from DEN to PHL is easy with Price Alerts. Simply create one of these automatic alerts and we'll get in touch as soon as there's a better deal.

  • Choose your preferred arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to get the best deals on flights from Denver International Airport to Philadelphia International Airport.

Handy information about Denver International Airport (DEN)

  • You'll find DEN at 8500 Pena Boulevard.

  • 80.23% of flights leaving Denver International Airport land at their destination as planned. With its dependable on-time performance, you're unlikely to experience delays when taking off from DEN.

  • Central Denver to Denver International Airport is approximately 40 kilometres. Depending on traffic, it'll take about 35 minutes to get there if you're ride-sharing, catching a cab or driving.

  • Catching public transport? You can expect a journey time of around 1 hour 30 minutes.

  • Get your flight from Denver International Airport to Philadelphia International Airport off to an easy start. Only a short drive from DEN, book a night at Baymont by Wyndham Denver International Airport and be well-rested for the journey ahead.

Arriving at Philadelphia International Airport (PHL)

Getting from Philadelphia International Airport (PHL) to central Philadelphia

  • The street address for PHL is Industrial Highway and Island Road.

  • From Philadelphia International Airport, Philadelphia is approximately 19 kilometres away. It takes around 15 minutes to reach the centre by car.

  • If you're travelling by public transport, expect a journey time of about 45 minutes.

When to fly to Philadelphia International Airport (PHL)

  • The quietest month for a flight from Denver International Airport to Philadelphia International Airport is February, while August is the busiest. Pick the best time to go to Philadelphia based on whether you prefer a more fast-paced or easygoing experience.

  • The warmest month in Philadelphia is July, with temperatures ranging between 18ºC and 32ºC. Lock in your flights from Denver International Airport to Philadelphia International Airport in this month if you enjoy this type of weather.

  • January sees average temperatures of between -7ºC and 9ºC. Look for cheap tickets from DEN to PHL sometime around then if you like travelling in cooler conditions.

Explore more of United States

  • You've done Philadelphia, now it's time to discover other corners of United States. Journey about 129 kilometres north-east to New York to check off its leading sights. From Statue of Liberty to Central Park and Empire State Building, you'll have a packed itinerary ahead.

  • Boston is another well-known destination in United States and is around 434 kilometres north-east of Philadelphia. No journey is complete without visiting Freedom Trail, Museum of Fine Arts Boston and Boston Tea Party Ships & Museum.

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