Find cheap flights from Pennsylvania to Colorado

Find cheap flights from Pennsylvania to Colorado

Search hundreds of travel sites at once for deals on flights to Colorado. Bundle your flight + hotel and save!

Round-trip
Economy
Boston (BOS)
Colorado
Thu 8/5
Thu 8/12
Any month
Bundle with KAYAK |
Include hotels

Good to know

Low season

AugustBest time to beat the crowds with an average 6% drop in price.

High season

DecemberMost popular time to fly with an average 18% increase in price.

Average price round-trip

$480(avg. price over the last 2 weeks)

Good deal round-trip

$77or less

Good deal one-way

$45or less

FAQs for booking flights from Pennsylvania to Colorado

Which airlines have a flexible cancellation policy for flights from Pennsylvania to Colorado due to COVID-19?

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

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

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

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

Top airlines flying from Pennsylvania to Colorado

Scores according to KAYAK customer reviews

5.7
Frontier
Overall score based on 39,927 reviews
6.4
Boarding
5.4
Comfort
6.8
Crew
4.6
Entertainment
4.7
Food
Airline reviews

Cons: "A soft drink that doesn’t cost money!!"

Pros: "Everything"
Cons: "Nothing"

Pros: "Nothing"
Cons: "Window seat and a beverage"

Pros: "Is good"
Cons: "Yes"

Pros: "Nothing"
Cons: "Everything"

Cons: "They need to stop having so many delays"

Cons: "Bathroom was beyond tiny"

Cons: "So grateful for all of the help we received!! Thank you!"

Cons: "Ridiculous surcharges, no water, no coffee"

Cons: "Check in"

Pros: "Frontier was smooth and efficient, didn’t have any issues."

Pros: "Nothing"
Cons: "Delays, gate changes, lack of notification, last minute changes."

Cons: "Frontier is an airlines that doesn't care about its customer. Period!"

Cons: "one hour late"

Cons: "Late again"

Cons: "I had to pay $50 for my bag"

Pros: "I did not like anything about this trip. The check in process was a pain. The boarding was chaos... (Of course, same 2 careless ladies were in charge."
Cons: "I did not like anything about this trip. The check in process was a pain. The boarding was chaos... (Of course, same 2 careless ladies were in charge)."

Pros: "Went exactly as described"

Pros: "Plane interior was bright and new."
Cons: "Baggage retrieval. Chairs don't recline."

Pros: "The staff was a well oiled machine! Very funny & accommodating. They were all very friendly & helpful to all of the passengers. Everything was clean & orderly."

Pros: "Early, friendly staff"
Cons: "No WiFi"

Pros: "Nothing"
Cons: "Everything"

Cons: "Everything, poos policies that do not satisfy the customer."

Cons: "Plane was too hot"

Pros: "Personnel were great"
Cons: "Luggage took over an hour"

Cons: "50 minutes late with no warning"

Cons: "40 minutes and still no bags"

Cons: "The same 2 screaming babies entire flights. Attendants allowed with no assistance."

Cons: "There were several delays."

Cons: "5 hr delay with no explanation."

Cons: "No food or entertainment."

Pros: "Everyone was friendly."
Cons: "Water wasn't free and no snacks. Had to wait at the gate"

Cons: "We had to wait an hour and a half waiting for a gait ot open for us. It was not very nice with an infant who was ready to get off the plane."

Cons: "Frontier is an awful scam of an airline."

Cons: "8 dollars for a can of soda? really?"

Pros: "Loved the pilots humor!!"

Pros: "Wish they had free snacks."

Pros: "Sort of cheap"
Cons: "Cheap at every level. Makes you feel unsafe. Are they cutting on cheap pilots too?"

Pros: "Nothing."
Cons: "Customers service"

Cons: "I did not know you all do not provide complimentary beverages and snacks. I did not know I had to purchase a seat to sit in for check in and only one carry-on was allowed."

Pros: "Getting off the plane."
Cons: "Everything else."

Cons: "They charged me for my carry on at the gate!"

Pros: "Nothing"

Pros: "someone stole an item from my suitcase"

Pros: "There is noting positive for me to say"

Pros: "Plane was delayed till the next morning... It was terrible"

Pros: "Excelente"

Cons: "Lost my luggage and people at check in were rude"

Pros: "I made it to my destination safely."
Cons: "Complementary soft drinks or coffee would have been nice."

Pros: "The spirit employees were very helpful when I checked in"

Pros: "Uncomfortable seat"
Cons: "Turbulence"

Pros: "Yes"
Cons: "Yes"

Pros: "The price"
Cons: "Communication"

Cons: "Spirit is unorganized and understaffed"

Pros: "EVERYthing"

Cons: "No Wifi, no seat reclining, late departure and delays"

Cons: "20 min Delayed departure"

Pros: "Everything was fantastic. Did get any food or drink tho. Staff was phenomenal!"

Pros: "Got what paid for"

Pros: "Price was right"
Cons: "Reserved my seat but didn't get it; cramped."

Cons: "I wasn't flying to hawaii"

Pros: "It was better than Frontier Airlines."

Pros: "NOTHING"
Cons: "Everything"

Cons: "Very uncomfortable ride. We a t-shirt hard ,zero leg room"

Pros: "They suck so bad!!!"
Cons: "They just suck really bad!!!"

Pros: "Nothing"
Cons: "The airplane"

Pros: "Nothing"
Cons: "Everything about it"

Pros: "Everything."

Pros: "Nothing"

Pros: "Nothing!"
Cons: "The plane was delayed! They have all these secret fees"

Pros: "Needs more room. Packed like sardines"

Pros: "Cheap and quick"
Cons: "Impersonal"

Cons: "No internet option to my knowledge."

Pros: "Good seat, enough room"
Cons: "Cost for food"

Pros: "Nothing"
Cons: "Fees, late arrival"

Pros: "Price was good. i ]will fly Spirit whenever possible and I will rnecomend often"
Cons: "Delay other than I did get a reminder ."

Cons: "Flights delayed multiple times both ways."

Pros: "The whole experience. Very friendly."
Cons: "No complaints"

Pros: "I got to Minnesota for cheap"
Cons: "Nothing was unexpected"

Pros: "good folks wo4rk there, kind and helpful"
Cons: "cost too high for no comfort/frills"

Pros: "Low fares. Great service."
Cons: "Nothing."

Pros: "All was great but the extra large seat did not recline?"

Pros: "IT WAS FAST TO GET SEATED"
Cons: "There was no leg space at all"

Pros: "Nothing"
Cons: "Everything"

Cons: "Tiny tray tables"

Cons: "Did not do final leg"

Pros: "Zero."
Cons: "everything."

Pros: "Nothing"
Cons: "Everything"

Cons: "So late!"

Pros: "the service was wonderful, the l8nes wwnt by quickly"

Pros: "No frills or hassles"

Pros: "The pilot made jokes about how cheap spirit airlines is."

Pros: "Low cost"
Cons: "Crowded seating"

Pros: "Nothing"
Cons: "Everything, the staff was rude and unpleasing."

Cons: "Late boarding."

Cons: "The plane smelled overwhelmingly like urine."

Cons: "Delayed like many spirit flights I have been on in the past"

Pros: "The ticket price was wonderful."
Cons: "Paying for luggage, seat, etc. - everything is an up charge."

Cons: "Hidden added fees"

Read more about Frontier
COVID-19 information

Safety measures for airlines flying from Pennsylvania to Colorado

Airlines flying from Pennsylvania to Colorado have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Pennsylvania to Colorado

Mandatory masks

Masks required on board, masks provided on flights from Pennsylvania to Colorado

Social distancing seating

Middle seats unavailable to book on flights from Pennsylvania to Colorado

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Pennsylvania to Colorado

Book cheap flights from Pennsylvania to Colorado

Recent round-trip flight deals

9/14
Tue
1 stop
Spirit Airlines
17h 48m
PHL - DEN
9/21
Tue
1 stop
Spirit Airlines
7h 56m
DEN - PHL
9/25
Sat
1 stop
Spirit Airlines
8h 13m
PHL - DEN
9/28
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Spirit Airlines
7h 56m
DEN - PHL
9/18
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1 stop
Spirit Airlines
8h 13m
PHL - DEN
9/25
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1 stop
Spirit Airlines
8h 33m
DEN - PHL
8/24
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Spirit Airlines
12h 08m
PHL - DEN
8/31
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1 stop
Spirit Airlines
7h 52m
DEN - PHL
9/14
Tue
1 stop
Spirit Airlines
11h 38m
PHL - DEN
9/18
Sat
1 stop
Spirit Airlines
8h 33m
DEN - PHL
9/4
Sat
1 stop
Spirit Airlines
12h 08m
PHL - DEN
9/7
Tue
1 stop
Spirit Airlines
7h 56m
DEN - PHL
8/28
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1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/31
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Spirit Airlines
10h 37m
DEN - PHL
9/29
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Spirit Airlines
11h 38m
PHL - DEN
10/4
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Spirit Airlines
7h 56m
DEN - PHL
8/25
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Spirit Airlines
12h 08m
PHL - DEN
8/28
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10h 37m
DEN - PHL
8/21
Sat
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/28
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Spirit Airlines
10h 37m
DEN - PHL
8/23
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12h 08m
PHL - DEN
8/30
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Spirit Airlines
7h 52m
DEN - PHL
8/17
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Spirit Airlines
18h 18m
PIT - DEN
8/24
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Spirit Airlines
9h 19m
DEN - PIT
9/20
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Spirit Airlines
19h 27m
PHL - DEN
9/25
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Spirit Airlines
8h 33m
DEN - PHL
8/24
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Multiple Airlines
7h 00m
PHL - DEN
9/1
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Multiple Airlines
7h 52m
DEN - PHL
8/26
Thu
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Multiple Airlines
16h 30m
ABE - DEN
9/8
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2 stops
Multiple Airlines
27h 14m
DEN - ABE
8/26
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Multiple Airlines
16h 30m
ABE - DEN
9/8
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12h 57m
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8/26
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Frontier
17h 02m
MDT - DEN
8/30
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Frontier
17h 40m
DEN - MDT
9/28
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United Airlines
28h 40m
PHL - COS
10/4
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United Airlines
15h 17m
COS - PHL
1/16
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American Airlines
9h 53m
AVP - DEN
1/26
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American Airlines
5h 54m
DEN - AVP
9/21
Tue
2 stops
Delta
18h 25m
SCE - DEN
9/28
Tue
2 stops
Delta
11h 25m
DEN - SCE
Show more results

Recent one-way flight deals

9/14
Tue
1 stop
Spirit Airlines
11h 38m
PHL - DEN
8/24
Tue
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/24
Tue
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/28
Sat
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/18
Wed
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/17
Tue
1 stop
Spirit Airlines
12h 03m
PHL - DEN
8/31
Tue
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/19
Thu
1 stop
Spirit Airlines
12h 08m
PHL - DEN
8/28
Sat
1 stop
Spirit Airlines
18h 25m
PIT - DEN
8/17
Tue
1 stop
Spirit Airlines
29h 15m
PHL - DEN
8/30
Mon
1 stop
Spirit Airlines
11h 55m
PHL - DEN
8/17
Tue
1 stop
Frontier
17h 30m
PHL - DEN
9/1
Wed
1 stop
Multiple Airlines
16h 47m
PHL - DEN
9/8
Wed
2 stops
Frontier
26h 36m
PHL - DEN
8/17
Tue
2 stops
Multiple Airlines
17h 09m
PIT - DEN
8/26
Thu
1 stop
Multiple Airlines
16h 30m
ABE - DEN
8/31
Tue
1 stop
United Airlines
6h 14m
AVP - DEN
10/27
Wed
2 stops
American Airlines
11h 48m
PIT - COS
11/11
Thu
2 stops
Delta
13h 25m
PIT - COS
9/9
Thu
2 stops
Allegiant Air
25h 50m
ABE - DEN
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