$85 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 5/14. 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

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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$119
Aspen
Aspen1 stop$397
Vail
Vail1 stop$360
Grand Junction
Grand Junction1 stop$329
Durango
Durango1 stop$340
Montrose
Montrose1 stop$330
Hayden
Hayden1 stop$359
Gunnison
Gunnison1 stop$280
Alamosa
Alamosa1 stop$618
Cortez
Cortez1 stop$396
Denver
Denvernonstop$119
Aspen
Aspen1 stop$397
Vail
Vail1 stop$360
Grand Junction
Grand Junction1 stop$329
Durango
Durango1 stop$340
Montrose
Montrose1 stop$330
Hayden
Hayden1 stop$359
Gunnison
Gunnison1 stop$280
Alamosa
Alamosa1 stop$618
Cortez
Cortez1 stop$396

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

Sat, May 30 - Fri, Jun 5
Frontier Logo
8:35 pm - 11:04 pm
PHL
-
DEN
4h 29mnonstop
Frontier Logo
7:40 am - 1:06 am
DEN
-
PHL
15h 26m
1 stop
$119Frontier
Sat, May 30 - Fri, Jun 5
Frontier Logo
8:35 pm - 11:04 pm
PHL
-
DEN
4h 29mnonstop
Frontier Logo
6:03 am - 6:40 pm
DEN
-
PHL
10h 37m
1 stop
$120Frontier
Sat, May 16 - Tue, May 19
United Airlines Logo
8:00 am - 12:39 pm
PHL
-
GUC
6h 39m
1 stop
United Airlines Logo
1:36 pm - 11:43 pm
GUC
-
PHL
8h 07m
1 stop
$280United Airlines
Sat, May 16 - Tue, May 19
United Airlines Logo
8:00 am - 12:39 pm
PHL
-
GUC
6h 39m
1 stop
United Airlines Logo
1:36 pm - 12:59 am
GUC
-
PHL
9h 23m
2 stops
$285United Airlines
Wed, Aug 19 - Tue, Aug 25
Delta Logo
8:00 am - 12:48 pm
PHL
-
COS
6h 48m
1 stop
Delta Logo
6:00 am - 3:02 pm
COS
-
PHL
7h 02m
1 stop
$293Delta
Wed, Aug 19 - Tue, Aug 25
Delta Logo
1:00 pm - 9:15 pm
PHL
-
COS
10h 15m
2 stops
Delta Logo
1:40 pm - 10:20 pm
COS
-
PHL
6h 40m
1 stop
$298Delta
Fri, May 29 - Sat, Jun 6
American Airlines Logo
5:00 am - 9:54 am
PHL
-
COS
6h 54m
1 stop
American Airlines Logo
5:35 am - 2:20 pm
COS
-
PHL
6h 45m
1 stop
$315American Airlines
Tue, Aug 18 - Mon, Aug 24
American Airlines Logo
11:05 am - 6:26 pm
PHL
-
GJT
9h 21m
1 stop
American Airlines Logo
12:12 pm - 11:28 pm
GJT
-
PHL
9h 16m
1 stop
$329American Airlines
Wed, Aug 26 - Mon, Aug 31
Southwest Logo
6:25 am - 12:40 pm
PHL
-
COS
8h 15m
2 stops
Southwest Logo
6:00 am - 5:55 pm
COS
-
PHL
9h 55m
2 stops
$334Southwest
Tue, May 5 - Sat, May 9
Southwest Logo
4:00 pm - 7:50 pm
PHL
-
HDN
5h 50m
1 stop
Southwest Logo
8:20 am - 4:15 pm
HDN
-
PHL
5h 55m
1 stop
$359Southwest
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.

How much is a round-trip flight from Philadelphia to Colorado?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Colorado departing in May.

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 $112 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 $112.

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

The average price for all round-trip flights from Philadelphia to Colorado depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $273 on average. Morning departures are around 10% 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 $416.

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 $347, 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 $279 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $428 and $369 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 14% 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$85
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 1% 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.

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 $148 one-way - $280 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 4327 reviews
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
Airline reviews

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

8.0 ExcellentCheryl, Apr 2026
DEN - SBA
Read more Southwest reviews

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

The seat was not comfortable. 1D. My back was sore all night and the next day.

Great flight. I didn't get a drink because I was asleep whole on the flight.

Great flight from Seattle to Phoenix and to Chicago-Midway from Phoenix

The new boarding process was easy and straightforward. Very pleasant.

The flight was okay. The pilots did an amazing job and kept us updated on the flight. The flight attendants were okay. They found time to be chatty with each other rather than focus on the guests. One of the attendants was a little less warm when asking about my bag I had on my lap that I was using during latter part of the mid- flight. Mind you, it was not the departure descent. I’m respectful to each and every attendant, it was the tone in her voice reminding me to place my carryon bag on the floor. I hope to have a better experience next time.

The entire travel day was a disaster from beginning to end. Woke up at two in the morning to make it to San Juan airport in time for a 5:30 am flight to Milwaukee which connected in Baltimore. Massive delays lead to me missing original connection out of Baltimore. Sixteen hours of delays/rebooking/layover time later, arrived in Milwaukee to find that only one of two checked bags made it there (despite the fact that Southwest brought another 737 jet to San Juan to fly us out to our original Baltimore connection—-not squeezed into another booked flight). The flight from Baltimore to Milwaukee was barely half full, so there was no logical reason to ship my bags out of Baltimore on a different flight to Chicago to then ship to Milwaukee. Southwest decided that my bags should not have been on the same connecting flight I WAS ON to Milwaukee, and then proceeded to accidentally leave my larger bag with the important items in Chicago. Terrible logic and support all around. Extremely angered and disappointed with SW. What a clownish operation your company has become!

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

Landed without a gate ready. Plane is extremely old and dirty.

All the amenities was wonderful, if they could keep their prices that low. I'd fly with them all the time.

Very old plane with no inflight entertainment. I purchased the internet pass and it was nearly unusable.

My tray was broken so i had no place to work or eat except my lap. Flight attendant said I would get an email with some credit or miles, it was a complete waste of time as I could only function at about 20% of normal. I have not received anything yet.

Short trip, no food and therefore no expectation for much interaction with staff who were pleasant and professional. My critique is on comfort of the seats. Exit rows and comfort seats do not provide enough personal space for 3 side-by-side seats, especially when in the middle row. Some passengers are not considerate of the middle seat and there should be signs that state something to the effect of: "please consider giving middle seats use of the armrests."

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

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.

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

Information on your arrival and departure airports