Cheap flights from Denver International to Philadelphia

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Flight deals from Denver International to Philadelphia

Looking for a cheap last-minute deal or the best round-trip flight from Denver International Airport to Philadelphia? If you want to travel next month, round-trip fares start from $204. Find the lowest prices on one-way and round-trip tickets right here.

Philadelphia.$179 per passenger.Departing Sat, Sep 19, returning Mon, Sep 21.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sat, Sep 19, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Mon, Sep 21, arriving in Denver International.Price includes taxes and charges.From $179, select.

Philadelphia.$204 per passenger.Departing Sat, Jul 25, returning Fri, Jul 31.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sat, Jul 25, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Fri, Jul 31, arriving in Denver International.Price includes taxes and charges.From $204, select.

Philadelphia.$215 per passenger.Departing Wed, Oct 28, returning Wed, Nov 4.Round-trip flight with Frontier Airlines and jetBlue.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Oct 28, arriving in Philadelphia International.Inbound indirect flight with jetBlue, departing from Philadelphia International on Wed, Nov 4, arriving in Denver International.Price includes taxes and charges.From $215, select.

Philadelphia.$218 per passenger.Departing Tue, Aug 11, returning Tue, Aug 18.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Tue, Aug 11, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Tue, Aug 18, arriving in Denver International.Price includes taxes and charges.From $218, select.

Philadelphia.$222 per passenger.Departing Sat, Oct 3, returning Sat, Oct 10.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sat, Oct 3, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Sat, Oct 10, arriving in Denver International.Price includes taxes and charges.From $222, select.

Philadelphia.$223 per passenger.Departing Wed, Aug 19, returning Wed, Sep 2.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Wed, Aug 19, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Wed, Sep 2, arriving in Denver International.Price includes taxes and charges.From $223, select.

Philadelphia.$229 per passenger.Departing Sat, Jul 18, returning Tue, Aug 11.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Sat, Jul 18, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Aug 11, arriving in Denver International.Price includes taxes and charges.From $229, select.

Philadelphia.$238 per passenger.Departing Wed, Sep 30, returning Tue, Oct 6.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Sep 30, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Oct 6, arriving in Denver International.Price includes taxes and charges.From $238, select.

Philadelphia.$239 per passenger.Departing Sat, Jul 18, returning Tue, Aug 11.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sat, Jul 18, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Tue, Aug 11, arriving in Denver International.Price includes taxes and charges.From $239, select.

Philadelphia.$250 per passenger.Departing Thu, Sep 24, returning Sat, Oct 3.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Thu, Sep 24, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Sat, Oct 3, arriving in Denver International.Price includes taxes and charges.From $250, select.

Philadelphia.$290 per passenger.Departing Tue, Nov 3, returning Tue, Nov 3.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Tue, Nov 3, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Tue, Nov 3, arriving in Denver International.Price includes taxes and charges.From $290, select.

Philadelphia.$310 per passenger.Departing Tue, Jun 30, returning Wed, Jul 1.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Tue, Jun 30, arriving in Philadelphia Trenton-Mercer.Inbound indirect flight with Frontier Airlines, departing from Philadelphia Trenton-Mercer on Wed, Jul 1, arriving in Denver International.Price includes taxes and charges.From $310, select.

Philadelphia.$312 per passenger.Departing Sun, Jun 28, returning Sat, Jul 4.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sun, Jun 28, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departing from Philadelphia International on Sat, Jul 4, arriving in Denver International.Price includes taxes and charges.From $312, select.

Philadelphia.$317 per passenger.Departing Wed, Oct 28, returning Wed, Nov 4.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Wed, Oct 28, arriving in Philadelphia International.Inbound direct flight with United departing from Philadelphia International on Wed, Nov 4, arriving in Denver International.Price includes taxes and charges.From $317, select.

Philadelphia.$337 per passenger.Departing Fri, Sep 18, returning Sun, Nov 8.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Fri, Sep 18, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sun, Nov 8, arriving in Denver International.Price includes taxes and charges.From $337, select.

Philadelphia.$341 per passenger.Departing Mon, Jun 29, returning Tue, Jun 30.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Mon, Jun 29, arriving in Philadelphia Trenton-Mercer.Inbound indirect flight with Frontier Airlines, departing from Philadelphia Trenton-Mercer on Tue, Jun 30, arriving in Denver International.Price includes taxes and charges.From $341, select.

Find the cheapest month to fly from Denver International to Philadelphia

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

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Direct flights from Denver International to Philadelphia

Alternative Denver International to Philadelphia routes

Looking for the cheapest, fastest or easiest route from Denver International to Philadelphia? You could fly into the following airports instead.

Denver to Philadelphia: Flight information

The things to know before you go.

Cheapest flight found	$179
Cheapest month to fly	September
Average flight time	3 hrs, 38 mins
Most popular airline	American Airlines
Average flights per week	126

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

How many airports are there in Philadelphia?

There are 6 airports in Philadelphia: Philadelphia International, Blue Bell, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.

How much are round-trip flights from Denver International to Philadelphia?

The best price we found for a round-trip flight from Denver International to Philadelphia is $179. 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.

How long does it take to fly from Denver International to Philadelphia?

3 hours and 38 minutes is the average flight time from Denver International to Philadelphia.

Which airlines fly direct from Denver International to Philadelphia?

American Airlines, Southwest Airlines and Qatar Airways fly direct from Denver International to Philadelphia.

How many flights are there a week from Denver International to Philadelphia?

There are 256 flights per week flying from Denver International to Philadelphia, as of June 2026.

When is the cheapest time to fly from Denver International to Philadelphia?

The cheapest month to fly from Denver International to Philadelphia is usually September.

What's the cheapest airport to fly to in Philadelphia?

If you're flying from Denver International Airport, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the center of Philadelphia. We've found flights to this airport from $179.

Which upcoming date is cheapest to fly from Denver International Airport to Philadelphia on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Philadelphia on Saturday, September 19, 2026.

Can I get a direct flight from Denver International Airport to Philadelphia?

Yes – the average flight time is 3 hours and 38 minutes.

How can I get the best flight deal from Denver International Airport to Philadelphia?

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 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.

When is the best time to book flights to Philadelphia?

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.

What’s the weather like in Philadelphia?

In June, the average temperature is usually around 21°C. July is typically the warmest month in Philadelphia, when it usually averages around 30°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -5°C. The rainiest month is July.

Which is the cheapest airline to fly with from Denver International Airport to Philadelphia?

Currently, Frontier Airlines offers the cheapest flight tickets to Philadelphia.

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

The average duration of a direct flight from Denver International Airport to Philadelphia is 4 hours 10 minutes.
Denver International Airport is located in Denver. Based in the UTC-5 timezone, Philadelphia is two hours ahead of Denver.
The busiest route is from Denver International Airport (DEN) to Philadelphia International Airport (PHL). You can select from 49 services every week between these two airports. If you want to head off as soon as possible, the earliest flight from DEN to PHL is the 00:20 American Airlines option. If you prefer traveling later, the final departure is at 23:59 with Frontier Airlines.
For stress-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to catch your DEN to Philadelphia flight.
Flying during a peak time such as July? Public holidays and other popular seasons can lead to longer lines and delays at security. Be extra cautious and arrive up to four hours before an international flight and two hours before a domestic departure.
You can book a direct Denver International Airport to Philadelphia ticket. Begin your trip at DEN and land at Philadelphia International Airport (PHL).
You'll find a variety of carriers that offer direct flights from Denver International Airport to Philadelphia, including:
Traveling from central Denver to DEN takes around 35 minutes on public transport. If you drive, ride-share or get a cab, you'll cover the 31 kilometers in 35 minutes or so, depending on traffic conditions.
Get your flight from Denver International Airport to Philadelphia off to an easy start. Only a quick drive from DEN, book a night at The Westin Denver International Airport and be well-rested for the trip ahead.
Denver International Airport has a strong on-time record, reducing the likelihood of delays. Departures from DEN make it to their destination as scheduled 80% of the time.
You'll find DEN at 8500 Pena Boulevard.

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

The best price we've seen for a one-way Denver International Airport to Philadelphia flight is $87. The cheapest price for a return flight is $179. Remember fares may change due to demand at the time of booking.
Don't wait until the last minute. You're more likely to pick up cheap flights from DEN to Philadelphia if you book in advance. Airlines often have some fantastic early bird deals.
The 'Whole month' tool will show you the cheapest tickets from Denver International Airport to Philadelphia throughout the month. It's an easy way to snap up a bargain if your dates are flexible.
Finding a cheap flight from DEN to Philadelphia is easy with Price Alerts. Simply set up one of these automatic notifications and we'll notify you when a new discount appears.
Pick your ideal departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Denver International Airport to Philadelphia by 'Best,' 'Fastest' or 'Cheapest.'

Airports in Philadelphia

Philadelphia International Airport (PHL)

The distance from Philadelphia International Airport (PHL) to central Philadelphia is roughly 18 kilometers. It'll take you about 20 minutes to get to the center driving.
Traveling on public transport typically takes 30 minutes.
Consider booking a hotel near PHL if you're coming in on a late flight from Denver International Airport to Philadelphia. Choose one of these options and make arrival day easier:
Lock in the lowest price by booking your vehicle from Philadelphia International Airport about three weeks in advance of your flight from DEN to Philadelphia.
The street address for PHL is 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

Central Philadelphia is located around 48 kilometers from Trenton-Mercer Airport (TTN). Once your flight from Denver International Airport to Philadelphia has hit the runway and you've made your way through the terminal, the drive should take about 40 minutes.
The journey will take roughly 1 hour 35 minutes on public transport.
Following your DEN to Philadelphia flight, settle in at a hotel close to TTN. These are some great options that'll help you sink into relaxation mode:
Call dibs on the best options. Booking your ride from TTN four weeks in advance often means better deals and a wider choice of vehicles.
Trenton-Mercer Airport can be found at Scotch Road, Terminal Building.

Best time to go to Philadelphia

December is the quietest month for flights from Denver International Airport to Philadelphia, while July is the most popular. Pick the best time to go to Philadelphia based on whether you prefer a laid-back vibe or a more bustling atmosphere.
Before locking in your Denver International Airport to Philadelphia plane ticket, think about the weather you're most comfortable in. July is the warmest month in Philadelphia, with temperatures ranging from 18ºC (64ºF) to 32ºC (90ºF).
January has average temperatures of between -7ºC (19ºF) and 9ºC (48ºF). Search for a cheap ticket from DEN to Philadelphia around that time if you want to travel in cooler conditions.

More about Philadelphia

Once you've booked your flight from Denver International Airport to Philadelphia, choose a hotel that puts you right where the action is. Make one of these options your base for exploring Philadelphia:
Liberty Bell and Independence Hall are a couple of leading attractions to add to your Philadelphia travel itinerary. Keep the sightseeing going at Philadelphia Museum of Art.

Explore more of the United States

New York is just one of the many places in the United States waiting to be discovered after you've seen Philadelphia. Around 129 kilometers away to the northeast, well-known attractions include Central Park, Statue of Liberty and Metropolitan Museum of Art.
Boston is another well-known destination in the United States and is around 434 kilometers northeast of Philadelphia. No trip is complete without experiencing Museum of Fine Arts Boston, Freedom Trail and USS Constitution Museum.