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Cheap flight tickets from Philadelphia to Denver

Compare Philadelphia 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 to Denver

Looking for a cheap last-minute deal or the best return flight from Philadelphia to Denver? Find the lowest prices on one-way and return tickets right here.
Denver.RM264 per passenger.Departing Thu, 9 Apr, returning Mon, 13 Apr.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Thu, 9 Apr, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Mon, 13 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM264, select.
Denver.RM264 per passenger.Departing Tue, 5 May, returning Wed, 6 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 Wed, 6 May, arriving in Philadelphia International.Price includes taxes and charges.From RM264, select.
Denver.RM272 per passenger.Departing Tue, 28 Apr, returning Tue, 12 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Tue, 28 Apr, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Tue, 12 May, arriving in Philadelphia International.Price includes taxes and charges.From RM272, select.
Denver.RM416 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 RM416, select.
Denver.RM541 per passenger.Departing Tue, 31 Mar, returning Fri, 10 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 Fri, 10 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM541, select.
Denver.RM560 per passenger.Departing Tue, 17 Mar, returning Tue, 17 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia International on Tue, 17 Mar, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 17 Mar, arriving in Philadelphia International.Price includes taxes and charges.From RM560, select.
Denver.RM734 per passenger.Departing Thu, 26 Mar, returning Wed, 1 Apr.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Philadelphia International on Thu, 26 Mar, arriving in Denver International.Inbound direct flight with Frontier Airlines departs from Denver International on Wed, 1 Apr, arriving in Philadelphia International.Price includes taxes and charges.From RM734, select.
Denver.RM746 per passenger.Departing Wed, 3 Jun, returning Tue, 9 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 Tue, 9 Jun, arriving in Philadelphia International.Price includes taxes and charges.From RM746, select.

Find the cheapest month to fly from Philadelphia to Denver

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia to Denver flights are currently cheapest in April.
Feb
from RM2,448
Mar
from RM560
Apr
from RM264
May
from RM264
Jun
from RM746
Jul
from RM1,049
Aug
from RM1,584
Sep
from RM1,745
Oct
from RM1,744
Nov
Find prices
Dec
Find prices
Jan
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Direct flights from Philadelphia to Denver

Alternative Philadelphia to Denver routes

Looking for the cheapest, fastest or easiest route from Philadelphia 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 RM264
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 foundRM264
Cheapest month to flyApril
Average flight time4 hrs, 17 mins
Most popular airlineAmerican Airlines
Average flights per week488

Finding cheap flights from Philadelphia 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 to Denver is RM264. 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 17 minutes is the average flight time from Philadelphia to Denver.
American Airlines, Southwest Airlines and United fly direct from Philadelphia to Denver.
As of February 2026, there are 122 flights per week flying from Philadelphia to Denver.
The cheapest month to fly from Philadelphia to Denver is usually April.
If you're flying from Philadelphia, 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 RM264.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Denver on Thursday, 9 April 2026.
Yes – the average flight time is 4 hours and 17 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 February, the average temperature is usually around 0°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.
The cheapest airline that flies to Denver is Frontier Airlines .

Travelling from Philadelphia to Denver: what you need to know

  • Begin your journey at one of Philadelphia's main airports, Philadelphia International Airport (PHL) or Trenton-Mercer Airport (TTN). Check out your options for booking a flight from Philadelphia to Denver jetting off from either of these.

  • Denver International Airport (DEN) is the major arrival point in Denver.

  • Jump on a direct Philadelphia to Denver flight and you'll be in the air for an average of 4 hours 10 minutes.

  • Denver's timezone is UTC-6, which makes Denver two hours behind Philadelphia.

  • The most popular route for flights from Philadelphia to Denver is from Philadelphia International Airport (PHL) to Denver International Airport (DEN). Choose from 50 services every week between these two airports. If you want to be on your way as soon as possible, the earliest flight from PHL to DEN is the 05:00 Southwest Airlines option. If you prefer to travel later, the final scheduled service is at 21:00 with American Airlines.

  • For stress-free travel, turn up at the airport two hours ahead of international flights and one hour before domestic departures. That way, you can comfortably board your Philadelphia to Denver flight.

  • You can expect longer lines during popular months such as August. Arriving up to four hours ahead of international flights and two hours for domestic departures is a wise move.

How to find the cheapest flights from Philadelphia to Denver

  • RM132 is the best price for a one-way ticket from Philadelphia to Denver. Return flights start at RM264. These prices can change based on demand.

  • To snag cheap Philadelphia to Denver flights, reserve your trip two months ahead of your departure.

  • The best month for landing cheap plane tickets from Philadelphia to Denver is May. Use the 'Whole month' tool to compare prices, then choose the dates that offer the lowest fares.

  • Locking in a cheap flight from Philadelphia to Denver is a breeze with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as there's a better deal.

  • Lock in a cheap Philadelphia to Denver flight with the help of our filters. Select your preferred departure time, duration and airlines, then sort the results by 'Cheapest' to see the best deals.

Flying from Philadelphia

Philadelphia International Airport (PHL)

  • If you're after a direct flight from Philadelphia to Denver, you can leave from Philadelphia International Airport (PHL). Travel from PHL to Denver International Airport (DEN) in one seamless trip.

  • Choose from a range of carriers offering direct Philadelphia to Denver plane tickets with departures from PHL, including:

  • PHL is around 11 kilometres from central Philadelphia. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 15 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the travel time to be around 45 minutes.

  • Catching an early flight from Philadelphia to Denver? Avoid the stress of rushing to the airport (and get some extra shut-eye) by choosing one of these hotels near Philadelphia International Airport:

  • Of all flights departing from Philadelphia International Airport, 78.93% land on time at their destination.

  • PHL's address is 8500 Essington Ave.

Arriving in Denver

Denver International Airport (DEN)

  • Denver International Airport (DEN) to central Denver takes about 35 minutes to reach by car. The centre is roughly 29 kilometres away.

  • Travelling to the centre on public transport typically takes 1 hour 30 minutes.

  • Consider staying at The Westin Denver International Airport after touching down from your flight from Philadelphia to Denver. It's a quick drive from DEN and a comfortable option if you want to relax as soon as possible.

  • Go where the road takes you with a Denver International Airport rental car. Book your wheels from Routes Car Rentals, Dollar or Budget and experience more of Denver and beyond.

  • Lock in the best possible rate by reserving your vehicle from Denver International Airport around one week in advance of your trip.

  • You'll find DEN at 8500 Pena Boulevard.

Best time to go to Denver

  • It's time to work out your dates for your flight from Philadelphia to Denver. July is the most popular month to visit Denver. If you prefer a quieter atmosphere, go in April.

  • The warmest month in Denver is July, with temperatures ranging between 14ºC (57ºF) and 32ºC (90ºF). Lock in your Philadelphia to Denver ticket then if that's your idea of comfortable weather.

  • January sees average temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Search for cheap flights from Philadelphia to Denver around that time if you like cooler conditions.

More about Denver

Explore more of United States

  • Colorado Springs is just one of the many places in United States waiting to be explored after you've seen Denver. Around 105 kilometres to the south, check out popular attractions including US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • Around 13 kilometres east of Denver, Aurora is another essential stop in United States. Start your sightseeing at Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.

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.