What is the cheapest airline that flies from Colorado to Philadelphia?

United Airlines, Southwest, and Delta are the most popular carriers operating from Colorado to Philadelphia

How many flights depart from Colorado to Philadelphia on average per week?

As of August 2026, there are 115 flights per week flying from Colorado to Philadelphia. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

How many flights depart from Colorado to Philadelphia on average per day?

16 flights are operational daily from Colorado to Philadelphia as of August 2026. The most popular departure time for this route is 12:00PM, with 42% of flights per day taking off at noon.

How long does it take to fly to Philadelphia?

If you’re flying from a popular airport in Colorado, such as Denver or Colorado Springs, and flying into Philadelphia, then you can expect flight times to average 3h 36m and 6h 36m, respectively.

What airlines fly to Philadelphia?

United Airlines, Frontier and Delta are the top three most popular airlines that fly to Philadelphia from Colorado according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 6 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Colorado to Philadelphia Airport?

Prices for flights from Colorado to Philadelphia Airport refresh daily.

How many operators does momondo search for flights from Colorado to Philadelphia Airport?

As of August 2026, there are 6 operators available to choose from for flights from Colorado to Philadelphia Airport.

How old do you have to be to fly from Colorado to Philadelphia Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Colorado to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$100 Cheap Flights from Colorado to Philadelphia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Philadelphia

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:28 pm - 9:20 pmDEN Denver Intl-PHL Philadelphia

5h 52m1 stop Raleigh-Durham

2:45 pm - 10:10 pmPHL Philadelphia-DEN Denver Intl

9h 25m1 stop Atlanta Hartsfield-Jackson

$225Frontier

Thu, Aug 27 - Mon, Aug 31

11:59 pm - 9:10 amDEN Denver Intl-PHL Philadelphia

7h 11m1 stop Orlando

7:10 am - 10:33 pmPHL Philadelphia-DEN Denver Intl

17h 23m1 stop Atlanta Hartsfield-Jackson

$225Frontier

Thu, Oct 22 - Fri, Oct 30

8:00 am - 5:20 pmDEN Denver Intl-PHL Philadelphia

7h 20m1 stop Des Moines

5:32 pm - 9:24 pmPHL Philadelphia-DEN Denver Intl

29h 52m1 stop Atlanta Hartsfield-Jackson

$226Multiple Airlines

Thu, Sep 10 - Sun, Sep 13

8:26 am - 2:47 pmDEN Denver Intl-PHL Philadelphia

28h 21m1 stop Knoxville McGhee Tyson

12:43 pm - 2:00 pmPHL Philadelphia-DEN Denver Intl

27h 17m1 stop Atlanta Hartsfield-Jackson

$226Multiple Airlines

Thu, Oct 29 - Sun, Nov 1

8:00 am - 1:43 pmDEN Denver Intl-PHL Philadelphia

3h 43mnonstop

9:23 am - 11:33 amPHL Philadelphia-DEN Denver Intl

4h 10mnonstop

$321American Airlines

Sun, Sep 6 - Fri, Sep 11

8:00 am - 5:57 pmEGE Vail Eagle County-PHL Philadelphia

7h 57m1 stop Dallas/Fort Worth

5:00 am - 12:17 pmPHL Philadelphia-EGE Vail Eagle County

9h 17m1 stop Dallas/Fort Worth

$321American Airlines

Tue, Sep 22 - Sun, Sep 27

10:05 am - 3:48 pmDEN Denver Intl-PHL Philadelphia

3h 43mnonstop

3:48 pm - 5:55 pmPHL Philadelphia-DEN Denver Intl

4h 07mnonstop

$332United Airlines

Sat, Sep 5 - Sat, Sep 12

6:10 pm - 11:55 pmDEN Denver Intl-PHL Philadelphia

3h 45mnonstop

4:05 pm - 6:05 pmPHL Philadelphia-DEN Denver Intl

4h 00mnonstop

$332Southwest

Wed, Sep 9 - Fri, Sep 11

6:00 pm - 11:50 pmDEN Denver Intl-PHL Philadelphia

3h 50mnonstop

12:35 pm - 2:25 pmPHL Philadelphia-DEN Denver Intl

3h 50mnonstop

$332Southwest

Fri, Sep 11 - Wed, Sep 16

8:15 am - 5:54 pmDEN Denver Intl-PHL Philadelphia

7h 39m1 stop Chicago O'Hare Intl

8:00 am - 10:05 amPHL Philadelphia-DEN Denver Intl

4h 05mnonstop

$338United Airlines

Thu, Sep 10 - Fri, Sep 11

Cheap last minute flights

Enter your travel dates to find the best prices.

6:05 am - 11:49 amDEN Denver Intl-PHL Philadelphia

3h 44mnonstop

8:37 pm - 11:04 pmPHL Philadelphia-DEN Denver Intl

4h 27mnonstop

$257Frontier

Wed, Aug 12 - Sun, Sep 6

6:05 am - 11:49 amDEN Denver Intl-PHL Philadelphia

3h 44mnonstop

3:50 pm - 11:58 pmPHL Philadelphia-DEN Denver Intl

10h 08m1 stop Charlotte Douglas

$292Frontier

Sat, Aug 8 - Sat, Aug 8

7:00 am - 4:30 pmGJT Grand Junction Regnl-PHL Philadelphia

7h 30m1 stop Dallas/Fort Worth

11:05 am - 6:26 pmPHL Philadelphia-GJT Grand Junction Regnl

9h 21m1 stop Phoenix Sky Harbor Intl

$439American Airlines

Wed, Aug 12 - Sun, Aug 23

5:30 am - 5:54 pmGJT Grand Junction Regnl-PHL Philadelphia

10h 24m2 stops Denver Intl Chicago O'Hare Intl

8:00 am - 12:38 pmPHL Philadelphia-GJT Grand Junction Regnl

6h 38m1 stop Denver Intl

$444United Airlines

Wed, Aug 12 - Sun, Aug 23

6:01 pm - 11:44 pmDEN Denver Intl-PHL Philadelphia

3h 43mnonstop

10:05 am - 12:10 pmPHL Philadelphia-DEN Denver Intl

4h 05mnonstop

$459United Airlines

Tue, Aug 11 - Tue, Aug 18

6:10 pm - 11:50 pmDEN Denver Intl-PHL Philadelphia

3h 40mnonstop

2:10 pm - 4:05 pmPHL Philadelphia-DEN Denver Intl

3h 55mnonstop

$459Southwest

Tue, Aug 11 - Sat, Aug 15

6:00 am - 4:00 pmDEN Denver Intl-PHL Philadelphia

8h 00m2 stops Dallas Love Field Chicago Midway

12:25 pm - 5:45 pmPHL Philadelphia-DEN Denver Intl

7h 20m2 stops Chicago Midway Lambert-St Louis

$471Southwest

Wed, Aug 12 - Sun, Sep 6

6:05 am - 11:49 amDEN Denver Intl-PHL Philadelphia

3h 44mnonstop

10:59 pm - 12:32 pmPHL Philadelphia-DEN Denver Intl

39h 33m3 stops San Juan Luis Munoz Marin Intl Fort Lauderdale Asheville Regional

$486Multiple Airlines

Wed, Aug 12 - Thu, Aug 13

6:05 am - 11:49 amDEN Denver Intl-PHL Philadelphia

3h 44mnonstop

10:59 pm - 12:32 pmPHL Philadelphia-DEN Denver Intl

39h 33m3 stops San Juan Luis Munoz Marin Intl Fort Lauderdale Asheville Regional

$487Multiple Airlines

Tue, Aug 11 - Thu, Aug 13

12:37 pm - 10:23 pmCOS Colorado Springs-PHL Philadelphia

7h 46m1 stop Chicago O'Hare Intl

4:28 pm - 10:53 pmPHL Philadelphia-COS Colorado Springs

8h 25m1 stop Dallas/Fort Worth

$489American Airlines

Wed, Aug 12 - Wed, Aug 19

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American Airlines flights from Colorado to Philadelphia

Our best American Airlines deals on Colorado to Philadelphia flight tickets

American Airlines

Sep 22

EGE8:00 amVail Eagle County

7h 57m

1 stop

PHL5:57 pmPhiladelphia

Sep 27

PHL5:00 amPhiladelphia

9h 17m

1 stop

EGE12:17 pmVail Eagle County

$321

American Airlines

Sep 5

COS1:17 pmColorado Springs

7h 34m

1 stop

PHL10:51 pmPhiladelphia

Sep 9

PHL5:00 amPhiladelphia

6h 22m

1 stop

COS9:22 amColorado Springs

$343

American Airlines

Sep 2

DRO10:21 amDurango La Plata County

8h 42m

1 stop

PHL9:03 pmPhiladelphia

Sep 9

PHL5:00 amPhiladelphia

6h 48m

1 stop

DRO9:48 amDurango La Plata County

$348

Frontier flights from Colorado to Philadelphia

Our best Frontier deals on Colorado to Philadelphia flight tickets

Frontier

Aug 27

DEN1:28 pmDenver Intl

5h 52m

1 stop

PHL9:20 pmPhiladelphia

Aug 31

PHL2:45 pmPhiladelphia

9h 25m

1 stop

DEN10:10 pmDenver Intl

$225

Frontier

Sep 26

DEN7:10 pmDenver Intl

10h 06m

1 stop

PHL7:16 amPhiladelphia

Oct 3

PHL12:40 pmPhiladelphia

10h 44m

1 stop

DEN9:24 pmDenver Intl

$226

Frontier

Sep 3

DEN11:59 pmDenver Intl

3h 40m

PHL5:39 amPhiladelphia

Sep 8

PHL8:30 amPhiladelphia

15h 35m

1 stop

DEN10:05 pmDenver Intl

$227

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Thu 8/27

1:28 pm-9:20 pm

1 stop5h 52m

Philadelphia

Mon 8/31

2:45 pm-10:10 pm

1 stop9h 25m

$225

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Thu 10/22

11:59 pm-9:10 am

1 stop7h 11m

Philadelphia

Fri 10/30

7:10 am-10:33 pm

1 stop17h 23m

$225

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Thu 9/10

8:00 am-5:20 pm

1 stop7h 20m

Philadelphia

Sun 9/13

5:32 pm-9:24 pm

1 stop29h 52m

$226

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Thu 10/29

8:26 am-2:47 pm

1 stop28h 21m

Philadelphia

Sun 11/1

12:43 pm-2:00 pm

1 stop27h 17m

$226

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Sun 9/6

8:00 am-1:43 pm

Nonstop3h 43m

Philadelphia

Fri 9/11

9:23 am-11:33 am

Nonstop4h 10m

$321

VailPhiladelphia

EGE Vail Eagle County - PHL Philadelphia

EGEPHL

Vail Eagle County

Tue 9/22

8:00 am-5:57 pm

1 stop7h 57m

Philadelphia

Sun 9/27

5:00 am-12:17 pm

1 stop9h 17m

$321

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Sat 9/5

10:05 am-3:48 pm

Nonstop3h 43m

Philadelphia

Sat 9/12

3:48 pm-5:55 pm

Nonstop4h 07m

$332

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Wed 9/9

6:10 pm-11:55 pm

Nonstop3h 45m

Philadelphia

Fri 9/11

4:05 pm-6:05 pm

Nonstop4h 00m

$332

Quickest round-trip

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Fri 9/11

6:00 pm-11:50 pm

Nonstop3h 50m

Philadelphia

Wed 9/16

12:35 pm-2:25 pm

Nonstop3h 50m

$332

DenverPhiladelphia

DEN Denver Intl - PHL Philadelphia

DENPHL

Denver Intl

Thu 9/10

8:15 am-5:54 pm

1 stop7h 39m

Philadelphia

Fri 9/11

8:00 am-10:05 am

Nonstop4h 05m

$338

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Colorado to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Colorado is in February. Flight prices, which tend to average around $288, are often lower during this time because this is during the off-season. The month of October is another great option to travel to Philadelphia, with average flight prices from Colorado averaging around $329.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from Colorado to Philadelphia is on a Friday. Travelers who choose to depart for Philadelphia on a Friday will often find tickets for as low as $383. On the other hand, Monday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $553.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Colorado to Philadelphia in the evening for as low as $290. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is at noon when prices are around $478.

What is the cheapest Colorado to Philadelphia flight route?

Fly from Denver Intl to Philadelphia for the best Colorado - Philadelphia flight prices

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

You are more likely to see cheaper flights to Philadelphia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $353 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Colorado for as low as $321 on momondo.

What cabin class options are available on Colorado to Philadelphia flights?

There are 4 cabin classes available to choose from on Colorado to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Colorado to Philadelphia flights?

You could potentially save up to 30% on your flight if you consider stops on a Colorado to Philadelphia flight.

Cheap Colorado to Philadelphia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Philadelphia

Best Price Found	$187
Fastest flight time	3h 20m
Direct flights	Every day
Airports in Philadelphia	1 airport

The best one-way flight to Philadelphia from Colorado in the past 72 hours is $187. The best round-trip flight deal from Colorado to Philadelphia found on momondo in the last 72 hours is $316.

The fastest flight from Colorado to Philadelphia takes 3h 20m

Direct flights go from Colorado to Philadelphia every day.

There is 1 airport in Philadelphia. From Colorado there are direct flights to Philadelphia (PHL).

Search flight deals

Frequently asked questions about flying from Colorado to Philadelphia

When did momondo last update prices for flights from Colorado to Philadelphia Airport?
Prices for flights from Colorado to Philadelphia Airport refresh daily.
How many operators does momondo search for flights from Colorado to Philadelphia Airport?
As of August 2026, there are 6 operators available to choose from for flights from Colorado to Philadelphia Airport.
How old do you have to be to fly from Colorado to Philadelphia Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Colorado to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Colorado to Philadelphia?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Colorado to Philadelphia is Boeing 737-800 (26.79% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (21.54%), Airbus A320neo (10.50%), and Airbus A321-100/200 (9.86%).

Best airlines flying from Colorado to Philadelphia

Compare and see reviews for airlines that fly from Colorado to Philadelphia with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $118	Free Cancellation	Rating 5.6 2,721 reviews	Search Frontier flights
JetBlue	PriceFrom $122	Free Cancellation	Rating 7.1 3,030 reviews	Search JetBlue flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.8 8,502 reviews	Search Delta flights
American Airlines	PriceFrom $139	Free Cancellation	Rating 7.1 11,881 reviews	Search American Airlines flights
United Airlines	PriceFrom $201	Free Cancellation	Rating 7.4 10,085 reviews	Search United Airlines flights
Southwest	PriceFrom $228	Free Cancellation	Rating 8.0 4,216 reviews	Search Southwest flights

Wildwood

Rehoboth Beach

Cape May

Wildwood Crest

Ocean City

Cherry Hill

King of Prussia

Newark

Reading

Essington

Dover

Dewey Beach

North Wildwood

New Castle

Chester

Avalon

Vineland

Lewes

Stone Harbor

Pottstown

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Philadelphia?

Finding the right flight to Philadelphia from Colorado is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Philadelphia quick and easy, saving you time and money.

Can I find flights from Colorado to Philadelphia with flexible booking policies on momondo?

Flights from Colorado to Philadelphia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Colorado to Philadelphia?

momondo helps you find the best flight between Colorado and Philadelphia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Colorado to Philadelphia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Philadelphia, momondo offers a useful price alert feature which will track prices for flights to Philadelphia from Colorado and alert you when they change.