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Cheap flight tickets from Philadelphia International to Denver

Compare Philadelphia International to Denver flight deals

Find the cheapest month or even day of the year to fly to Denver

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Flight deals from Philadelphia International Airport to Denver

Looking for a cheap last-minute deal or the best return flight from Philadelphia International Airport to Denver? If you want to travel next month, return fares start from RM226. Find the lowest prices on one-way and return tickets right here.
Denver.RM226 per passenger.Departing Mon, 20 Apr, returning Sat, 25 Apr.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Mon, 20 Apr, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 25 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM226, select.
Denver.RM226 per passenger.Departing Tue, 21 Apr, returning Tue, 5 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Tue, 21 Apr, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 5 May, arriving in Philadelphia International.Price includes taxes and charges.From RM226, select.
Denver.RM285 per passenger.Departing Tue, 5 May, returning Tue, 19 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Tue, 5 May, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 19 May, arriving in Philadelphia International.Price includes taxes and charges.From RM285, select.
Denver.RM453 per passenger.Departing Tue, 12 May, returning Tue, 2 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 12 May, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 2 Jun, arriving in Philadelphia International.Price includes taxes and charges.From RM453, select.
Denver.RM550 per passenger.Departing Thu, 19 Mar, returning Tue, 24 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 19 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 24 Mar, arriving in Philadelphia International.Price includes taxes and charges.From RM550, select.
Denver.RM604 per passenger.Departing Fri, 1 May, returning Sat, 15 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Fri, 1 May, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Sat, 15 Aug, arriving in Philadelphia International.Price includes taxes and charges.From RM604, select.
Denver.RM659 per passenger.Departing Tue, 31 Mar, returning Sat, 18 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 31 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 18 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM659, select.
Denver.RM662 per passenger.Departing Wed, 3 Jun, returning Sat, 6 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Wed, 3 Jun, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 6 Jun, arriving in Philadelphia International.Price includes taxes and charges.From RM662, select.
Denver.RM796 per passenger.Departing Sun, 8 Mar, returning Wed, 6 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Sun, 8 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 6 May, arriving in Philadelphia International.Price includes taxes and charges.From RM796, select.
Denver.RM802 per passenger.Departing Mon, 23 Mar, returning Fri, 27 Mar.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Mon, 23 Mar, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Fri, 27 Mar, arriving in Philadelphia International.Price includes taxes and charges.From RM802, select.
Denver.RM1,045 per passenger.Departing Tue, 31 Mar, returning Sat, 18 Apr.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Tue, 31 Mar, arriving in Denver International.Inbound direct flight with United departs from Denver International on Sat, 18 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM1,045, select.
Denver.RM1,062 per passenger.Departing Thu, 9 Jul, returning Sun, 12 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Thu, 9 Jul, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Sun, 12 Jul, arriving in Philadelphia International.Price includes taxes and charges.From RM1,062, select.
Denver.RM1,123 per passenger.Departing Tue, 30 Jun, returning Wed, 1 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 30 Jun, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 1 Jul, arriving in Philadelphia International.Price includes taxes and charges.From RM1,123, select.
Denver.RM1,200 per passenger.Departing Wed, 1 Jul, returning Mon, 6 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Wed, 1 Jul, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 6 Jul, arriving in Philadelphia International.Price includes taxes and charges.From RM1,200, select.
Denver.RM1,260 per passenger.Departing Tue, 12 May, returning Tue, 2 Jun.Return flight with United.Outbound direct flight with United departs from Philadelphia International on Tue, 12 May, arriving in Denver International.Inbound direct flight with United departs from Denver International on Tue, 2 Jun, arriving in Philadelphia International.Price includes taxes and charges.From RM1,260, select.
Denver.RM1,471 per passenger.Departing Sat, 27 Jun, returning Mon, 6 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Sat, 27 Jun, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 6 Jul, arriving in Philadelphia International.Price includes taxes and charges.From RM1,471, select.

Find the cheapest month to fly from Philadelphia International to Denver

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Denver flights are currently cheapest in April.
Mar
from RM550
Apr
from RM226
May
from RM285
Jun
from RM662
Jul
from RM1,062
Aug
from RM1,675
Sep
from RM1,752
Oct
from RM1,769
Nov
from RM1,752
Dec
from RM2,129
Jan
Find prices
Feb
Find prices

Direct flights from Philadelphia International to Denver

Alternative Philadelphia International to Denver routes

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

Denver Arapahoe Co

1km from central Denver
Closest
Search flights

Broomfield

23km from central Denver
Search flights

Denver International

30km from central Denver
Cheapest
from RM226
Search flights

Northern Colorado Regional

79km from central Denver
Search flights

Philadelphia to Denver: Flight information

The things to know before you go.
Cheapest flight foundRM226
Cheapest month to flyApril
Average flight time4 hrs, 16 mins
Most popular airlineAmerican Airlines
Average flights per week115

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

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.
The best price we found for a return flight from Philadelphia International to Denver is RM226. 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.
4 hours and 16 minutes is the average flight time from Philadelphia International to Denver.
American Airlines, Southwest Airlines and United fly direct from Philadelphia International to Denver.
As of March 2026, there are 230 flights per week flying from Philadelphia International to Denver.
The cheapest month to fly from Philadelphia International to Denver is usually April.
If you're flying from Philadelphia International Airport, the cheapest airport near Denver is Denver International – which is 29.9 km away from the centre of Denver. We've found flights into this airport from RM226.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Denver on Monday, 20 April 2026.
Yes – the average flight time is 4 hours and 16 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 Denver 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 Denver is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 4°C. July is typically the warmest month in Denver, when it usually averages around 31°C. You can expect the least rain in January. The coldest month is December, with temperatures averaging -6°C. The rainiest month is July.
Currently, Frontier Airlines offers the cheapest flight tickets to Denver.

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

  • Expect to be travelling for 3 hours 35 minutes. On average, that's the duration of a direct flight from Philadelphia International Airport to Denver.

  • Philadelphia International Airport is located in Philadelphia. Following the UTC-6 timezone, Denver is two hours behind Philadelphia.

  • With 50 flights a week between the two airports, Philadelphia International Airport (PHL) to Denver International Airport (DEN) is the most popular route. Southwest Airlines operates the earliest flight at 05:00. If you're eager to make the most of your day before you fly, the last departure from PHL to DEN is with American Airlines at 21:00.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This leaves you with plenty of time to catch your PHL to Denver flight.

  • If you're flying during a major holiday or another peak period, give yourself more time. A good general rule is two hours ahead of domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

  • You can book a direct Philadelphia International Airport to Denver ticket. Begin your journey at PHL and arrive at Denver International Airport (DEN).

  • You'll have your pick of carriers that operate direct flights from Philadelphia International Airport to Denver. Book your ticket with one of these:

  • The journey from central Philadelphia to PHL takes around 45 minutes by public transport. If you drive, ride-share or get a cab, you'll cover the 11 kilometres in 15 minutes or so, depending on traffic.

  • Catching an early flight from Philadelphia International Airport to Denver? Avoid the hassle of rushing to the airport (and enjoy a little extra shut-eye) by choosing one of these hotels near PHL:

  • When it comes to Philadelphia International Airport's on-time performance, 78.93% of flights meet their scheduled arrival time.

  • The address for PHL is 8500 Essington Ave.

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

  • The lowest price we've found for a one-way Philadelphia International Airport to Denver flight is RM173. The cheapest price for a return flight is RM226. Keep in mind fares may change due to demand at the time of booking.

  • Book one month before flying. Pricing trends show that this is the ideal window for finding cheap flights from PHL to Denver.

  • The best month for finding cheap Philadelphia International Airport to Denver tickets is May. Use the 'Whole month' tool to compare flight prices, then select the dates that offer the biggest savings.

  • Spend less time searching for cheap flights from PHL to Denver by setting up a Price Alert. We'll send you an email or push notification on the app when a special offer becomes available.

  • Find an affordable flight from Philadelphia International Airport to Denver with the help of our filters. Choose your preferred duration, departure time and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in Denver

Denver International Airport (DEN)

  • Denver International Airport (DEN) is around 40 kilometres from the centre of Denver. If you're catching a cab or a ride-share, the drive takes about 35 minutes.

  • It typically takes 1 hour 30 minutes if you're travelling on public transport.

  • Once your flight from Philadelphia International Airport to Denver has landed, kick back at a hotel close by. Baymont by Wyndham Denver International Airport is a convenient option just a short drive from DEN.

  • Get on the fast track to adventure by picking up a Denver International Airport rental car. Grab a set of wheels from Routes Car Rentals, Dollar or Budget and explore beyond Denver's main sights.

  • Lock in the best deal by reserving your ride from Denver International Airport about one week ahead of your flight from PHL to Denver.

  • The address for DEN is 8500 Pena Boulevard.

Best time to go to Denver

  • Carefully consider your trip dates before locking in your flight from Philadelphia International Airport to Denver. The city comes alive during high season, but rates are typically higher and attractions can be crowded. Plan your trip to Denver in low season if you want a more relaxed vibe.

  • Lock in a Philadelphia International Airport to Denver flight ticket with a departure in July to experience the city during its warmest month. Expect temperatures to range from 14ºC (57ºF) to 32ºC (90ºF).

  • January has average temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Look for a cheap ticket from PHL to Denver around that time if you want to travel when it's cooler.

More about Denver

Explore more of United States

  • Denver has its own special appeal, but there are so many other parts of United States waiting to be explored. About 105 kilometres south of Denver, a trip to Colorado Springs will fill your itinerary to the brim. Start with leading attractions like US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • Pueblo is another essential stop in United States and is around 161 kilometres south of Denver. No journey is complete without a visit to Pueblo Weisbrod Aircraft Museum, Rosemount Museum and Pueblo Zoo.

Plan the rest of your trip from Philadelphia to Denver

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