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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 return flight from Denver International to Philadelphia? Find the lowest prices on one-way and return tickets right here.
Philadelphia.101 € per passenger.Departing Wed, 4 Jun, returning Wed, 18 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 4 Jun, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Wed, 18 Jun, arriving in Denver International.Price includes taxes and charges.From 101 €, select.
Philadelphia.137 € per passenger.Departing Tue, 1 Jul, returning Sun, 6 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 1 Jul, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sun, 6 Jul, arriving in Denver International.Price includes taxes and charges.From 137 €, select.
Philadelphia.155 € per passenger.Departing Sat, 24 May, returning Sat, 16 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 24 May, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 16 Aug, arriving in Denver International.Price includes taxes and charges.From 155 €, select.
Philadelphia.156 € per passenger.Departing Sat, 24 May, returning Sat, 31 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 24 May, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 31 May, arriving in Denver International.Price includes taxes and charges.From 156 €, select.
Philadelphia.156 € per passenger.Departing Sat, 28 Jun, returning Sat, 5 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 28 Jun, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 5 Jul, arriving in Denver International.Price includes taxes and charges.From 156 €, select.
Philadelphia.156 € per passenger.Departing Sat, 24 May, returning Wed, 11 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 24 May, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Wed, 11 Jun, arriving in Denver International.Price includes taxes and charges.From 156 €, select.
Philadelphia.165 € per passenger.Departing Thu, 11 Sep, returning Sat, 13 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Thu, 11 Sep, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 13 Sep, arriving in Denver International.Price includes taxes and charges.From 165 €, select.
Philadelphia.165 € per passenger.Departing Mon, 11 Aug, returning Sat, 16 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Mon, 11 Aug, arriving in Philadelphia International.Inbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 16 Aug, arriving in Denver International.Price includes taxes and charges.From 165 €, 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 June.
May
from 156 €
Jun
from 101 €
Jul
from 137 €
Aug
from 165 €
Sep
from 165 €
Oct
from 356 €
Nov
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Dec
from 480 €
Jan
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Feb
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Mar
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Apr
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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 found101 €
Cheapest month to flyJune
Average flight time3 hrs, 37 mins
Most popular airlineUnited
Average flights per week110

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

There are 6 airports in Philadelphia: Philadelphia International, Blue Bell, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.
The best price we found for a return flight from Denver International to Philadelphia is 101 €. 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.
United, Southwest Airlines and American Airlines fly direct from Denver International to Philadelphia.
As of May 2025, there are 110 flights per week flying from Denver International to Philadelphia.
The cheapest month to fly from Denver International to Philadelphia is usually May 2025.
If you're flying from Denver International Airport, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the centre of Philadelphia. We've found flights into this airport from 101 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Philadelphia on Wednesday, 4 June 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 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.
In May, the average temperature is usually around 16°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.
Currently, Frontier Airlines offers the cheapest flight tickets to Philadelphia.

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

  • Expect to be in the air for 4 hours 12 minutes. On average, that's the time it takes for a direct flight from Denver International Airport to Philadelphia.

  • Philadelphia is 2 hours ahead of Denver, where Denver International Airport is located. Philadelphia operates on the UTC-4 timezone.

  • The most popular route is from Denver International Airport (DEN) to Philadelphia International Airport (PHL). There are 74 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 06:05 Frontier Airlines service. If you're planning to fly out later on, the last departure is at 23:59 with Frontier Airlines.

  • Give yourself enough time to get on your flight from DEN to Philadelphia. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak month like July? High seasons (like Thanksgiving, Christmas/New Year and spring break) can add another hour at security. Be extra cautious and arrive up to four hours ahead of international flights and two hours before a domestic departure.

  • Direct flights from Denver International Airport (DEN) to Philadelphia are available for booking. Philadelphia International Airport (PHL) is where you'll be landing.

  • Well-known airlines that offer direct flights from Denver International Airport to Philadelphia include:

  • You won't need your passport or a visa to fly within United States. You will need a valid proof of identity though, such as an ID card or driver's licence. Add them to your packing checklist once you've booked your cheap tickets from Denver International Airport to Philadelphia.

  • The journey from central Denver to DEN takes approximately 1 hour and 31 minutes on public transport. If you drive, ride-share or take a cab, you'll cover the 40 kilometres in 34 minutes or so, depending on traffic conditions.

  • Get your flight from Denver International Airport to Philadelphia off to an easy start. Just a quick ride from DEN, spend the night at SpringHill Suites Denver Airport and be well-rested for the journey ahead.

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

  • 51 € is the lowest price we've found for a one-way ticket from Denver International Airport to Philadelphia. For a return flight on this route, the best price is 101 €. Depending on how early you book and the availability, these fares can change.

  • Get cheap tickets from DEN to Philadelphia by booking at least 9 months ahead. Based on our research, that's the sweet spot for landing a bargain.

  • The cheapest month for tickets from Denver International Airport to Philadelphia is May. You can easily compare prices using the 'Whole month' tool to find the cheapest travel date.

  • Sign into your online account or use the app to set up a Price Alert. You'll get notified straight away if there's a cheaper deal on this route. It's easy to do, and it'll save you from searching for cheap tickets from DEN to Philadelphia every day.

  • Tailor your flights with filters. Pick your ideal arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Fastest' or 'Cheapest' flights from Denver International Airport to Philadelphia.

Airports in Philadelphia

Philadelphia International Airport (PHL)

Trenton-Mercer Airport (TTN)

  • As soon as your flight from Denver International Airport to Philadelphia has arrived, you can get to the city centre in about 39 minutes by car. Central Philadelphia is approximately 56 kilometres from Trenton-Mercer Airport (TTN).

  • You can expect the journey to take roughly 1 hour and 43 minutes on public transport.

  • You'll find some great places ready to welcome you near TTN. Tuck yourself in and get cosy after your flight from DEN to Philadelphia at one of these well-located options:

Best time to go to Philadelphia

  • August is the most popular month for flights from Denver International Airport to Philadelphia. To escape the crowds, visit Philadelphia in February when it's quieter.

  • Book your flight from Denver International Airport to Philadelphia for July to visit the city during its warmest month. You can expect temperatures to range from 18ºC to 32ºC.

  • January has average temperatures of between -7ºC and 9ºC. Look for cheap flights from DEN to Philadelphia sometime around then if you like cooler conditions.

More about Philadelphia

  • Start your Philadelphia trip off on the right foot by choosing the perfect place to stay. After booking your flight from Denver International Airport to Philadelphia, check out our range of accommodation options including:

  • All great journeys should include some sightseeing. Liberty Bell, Independence Hall and Philadelphia Museum of Art are must-do's during your Philadelphia adventure.

Complete your Philadelphia trip with a car rental

  • Pick one of our car rentals in Philadelphia and explore the city in your own time. Easily compare options in one go to find your perfect ride once you've booked your hotel and cheap flights from Denver International Airport to Philadelphia.

Plan the rest of your trip from Denver to Philadelphia

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