$80 Find Cheap Flights from Philadelphia to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Colorado departing on 2/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Colorado.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Colorado.
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Cheap Flights from Philadelphia to Colorado

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denvernonstop$152
Aspen
Aspen1 stop$309
Grand Junction
Grand Junction1 stop$274
Durango
Durango1 stop$238
Montrose
Montrose1 stop$237
Hayden
Hayden1 stop$249
Gunnison
Gunnison2 stops$344
Alamosa
Alamosa2 stops$570
Vail
Vail1 stop$309
Denver
Denvernonstop$152
Aspen
Aspen1 stop$309
Grand Junction
Grand Junction1 stop$274
Durango
Durango1 stop$238
Montrose
Montrose1 stop$237
Hayden
Hayden1 stop$249
Gunnison
Gunnison2 stops$344
Alamosa
Alamosa2 stops$570
Vail
Vail1 stop$309

Book Cheap Philadelphia to Colorado Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Colorado that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Colorado

Sun, Dec 21 - Mon, Jan 5
Frontier Logo
8:36 pm - 10:59 pmPHL-DEN
4h 23mnonstop
Frontier Logo
11:59 pm - 5:31 amDEN-PHL
3h 32mnonstop
$152Frontier
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Sun, Dec 7 - Fri, Dec 12
Frontier Logo
8:36 pm - 10:59 pmPHL-DEN
4h 23mnonstop
Frontier Logo
12:11 pm - 11:15 pmDEN-PHL
9h 04m1 stop
$153Frontier
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Fri, Jan 30 - Tue, Feb 3
Delta Logo
6:55 am - 1:08 pmPHL-MTJ
8h 13m1 stop
Delta Logo
2:05 pm - 12:23 amMTJ-PHL
8h 18m1 stop
$237Delta
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Sat, Feb 7 - Sat, Feb 14
American Airlines Logo
3:35 pm - 9:22 pmPHL-DRO
7h 47m1 stop
American Airlines Logo
5:50 am - 2:27 pmDRO-PHL
6h 37m1 stop
$238American Airlines
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Tue, Feb 10 - Sat, Feb 14
United Airlines Logo
10:10 am - 8:17 pmPHL-MTJ
12h 07m2 stops
United Airlines Logo
1:32 pm - 11:53 pmMTJ-PHL
8h 21m1 stop
$242United Airlines
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Sat, Feb 7 - Sat, Feb 14
American Airlines Logo
10:43 am - 6:19 pmPHL-DRO
9h 36m2 stops
American Airlines Logo
5:50 am - 2:27 pmDRO-PHL
6h 37m1 stop
$244American Airlines
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Sat, Feb 21 - Sat, Feb 28
Southwest Logo
5:55 am - 10:20 amPHL-HDN
6h 25m1 stop
Southwest Logo
11:10 am - 9:55 pmHDN-PHL
8h 45m1 stop
$249Southwest
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Tue, Mar 24 - Wed, Mar 25
Delta Logo
8:25 am - 1:19 pmPHL-MTJ
6h 54m1 stop
Delta Logo
2:17 pm - 10:56 pmMTJ-PHL
6h 39m1 stop
$249Delta
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Sun, Feb 1 - Sun, Feb 15
Southwest Logo
5:00 am - 11:35 amPHL-HDN
8h 35m1 stop
Southwest Logo
12:15 pm - 10:15 pmHDN-PHL
8h 00m1 stop
$274Southwest
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Wed, Mar 4 - Mon, Mar 9
United Airlines Logo
10:06 am - 8:30 pmPHL-GJT
12h 24m2 stops
United Airlines Logo
1:38 pm - 11:30 pmGJT-PHL
7h 52m1 stop
$292United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Philadelphia to Colorado flights

Get data-powered insights and trends into flights from Philadelphia to Colorado to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Philadelphia to Colorado flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Colorado from Philadelphia found in the last 72 hours was to Denver, at $126 round-trip. The most popular route is from Philadelphia (PHL) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $126.

Can I save money by flying with a layover from Philadelphia to Colorado?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $298, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Philadelphia to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Colorado, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Colorado is August, when tickets cost $278 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $384 and $346 respectively.

What’s the cheapest day of the week to fly from Philadelphia to Colorado?

The average price of all round-trip flights from Philadelphia to Colorado clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Colorado on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Philadelphia to Colorado. For your return ticket, we recommend flying on a Thursday and avoiding Mondays for the best deals.

How far in advance should I book a flight from Philadelphia to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Colorado, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Colorado, you should book around 2 weeks before departure, which saves you about 9% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$80
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Philadelphia to Denver

FAQs - booking Colorado flights

  • How large can a carry-on bag be on a flight from Philadelphia to Colorado?

    A good way to get around spending a small fortune on baggage fees is by only bringing a carry-on bag with you as you fly from Philadelphia to Colorado. But you will need to make sure your bag isn't too big to fit on your plane. Airlines like American Airlines will ask you to bring a carry-on bag no larger than 22 x 14 x 9 inches.

  • Are there any small airports near Philadelphia that might be good alternatives?

    If you would prefer to fly out of a smaller airport than Philadelphia International Airport (PHL), Atlantic City International Airport (ACY) might be a good option. It's not too far away from Philadelphia International Airport, and it offers flights to Denver (DEN), Vail (EGE), Aspen (ASE), and other parts of Colorado.

  • Can you get free Wi-Fi on airlines that fly from Philadelphia to Colorado?

    Most airlines will only provide first-class passengers with free Wi-Fi on flights to Colorado. But if you fly with an airline like Delta, you might be able to get Wi-Fi without paying for it. Simply sign up for the SkyMiles program and you'll get to use Delta's Wi-Fi without paying for it.

  • How can I make a flight from Philadelphia to Colorado more sustainable?

    To make sure your flight from Philadelphia to Colorado is sustainable, fly with an airline like United Airlines. United is in the process of making a push to become carbon-neutral. The airline is doing it by gradually upgrading its fleet and all the equipment it uses on the ground.

  • How does KAYAK find such low prices on flights from Philadelphia to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to Colorado is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Philadelphia to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Philadelphia to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally in the afternoon, when round-trip flights cost $278 on average. Morning departures are around 19% cheaper than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the evening, which is peak travel time and where the average cost of a ticket is $442.

Top tips for finding cheap flights to Colorado

  • Looking for a cheap flight? 25% of our users found tickets from Philadelphia to the following destinations at these prices or less: Denver $163 one-way - $250 round-trip
  • Anyone who would like to fly from Philadelphia International Airport (PHL) to Colorado will be able to do it through a number of different airlines. Delta, Frontier, Spirit Airlines, and United Airlines all have flights that depart from here. However, because Philadelphia International Airport is a hub for American Airlines, it often offers the most flights to Colorado.
  • Outside of thinking about which airline you would like to fly with when traveling from Philadelphia to Colorado, you should also give thought to which airport you want to arrive at Denver International Airport (DEN) is where most airlines will head when en route to Colorado. But you'll also have the option to stop at Denver and catch connecting flights to other Colorado airports such as Eagle County Regional Airport (EGE) and Aspen/Pitkin County Airport (ASE).
  • If you're traveling from Philadelphia to Colorado to go skiing, you might be wondering if you can bring your ski equipment along. You'll be happy to hear that most airlines will allow you to fly with it. You will, however, need to check your ski equipment just like you would check bags and pay extra for them if you aren't flying first class.
  • Those who can swing it should try to fly first class from Philadelphia to Colorado whenever possible. In addition to the fact that you'll be able to check bags for free when you have a first-class ticket, you'll also get amenities like extra legroom and a long list of menu options when you're in first class. It'll allow you to relax as you make your way to your destination.
  • Philadelphia International Airport has places for you to kill time if you arrive early for a flight to Colorado. The Admirals Club will be open to any passengers flying with American Airlines. There are also other lounges like the American Express Centurion Lounge.

Reviews of the top 5 airlines serving from Philadelphia to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4246 reviews
7.0Food
8.6Crew
7.5Entertainment
8.0Comfort
8.1Boarding
Airline reviews

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

10.0 ExcellentGordon, Nov 2025SAN - OAK
Read more Southwest reviews

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

My husband and I recently had an unfortunate experience with Lufthansa. At the Philadelphia International airport, the ground staff refused to board us because we didn’t have a current visa stamped on our passports for Frankfurt. We completely understand that this was our mistake. we should have double-checked the visa requirements before our trip. However, the issue that upset us most was how the situation was handled by the staff. They told us they would mark it as “boarding denied due to visa issue”, but instead they recorded it as “no show”. Because of that incorrect entry, our return flight was automatically cancelled as well, which caused additional stress and expense. Mistakes can happen, but we expected more transparency and accuracy from a reputed airline like Lufthansa. It would have made a big difference if the staff had been more careful and considerate in documenting the situation correctly.

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

Terrible. They wouldn't allow me on my flight on the 14th..

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

Flight was delayed and after being in the airport for like seven hours, it was canceled.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

Overall very good, only complaint I have is the crew from CLT to SAT could have collected trash sooner.

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

First of all, we never got on the connecting flight to Denver. They delayed our flight for two hours. If we would have gotten on that flight, we would have been stuck in Denver for 13 hours. So we re- routed our flight for a straight through flight to Oklahoma two days later. THEN, they delayed that flight for two hours. After that we were able to finally get on our flight and come home. Frontier Airlines - one of the worst airlines I have ever been on.

Terrible communication with weather delay, lost baggage, near impossible to reach customer service

Everything you need to know for your flight from Philadelphia to Colorado

Information on your arrival and departure airports