HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Delaware

$84+ Cheap flights from Colorado to Delaware

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ILG
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado to Delaware with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Colorado to Delaware

Keep the following information in mind while searching for Colorado to Delaware flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$157
(Frontier)

One-way from

$84
(Trip.com)

Popular in

December

Cheapest in

May

Average price

$296
Provider with most accurate pricing for Denver Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Philadelphia flights.
Search Deals
From Colorado to Delaware
Search Deals
One-way flight from Colorado to Delaware
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Colorado to Delaware

Cheapest flights from Colorado to Delaware
Explore the most affordable flight options available from Colorado to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1611:45 pmDEN - PHL
Nonstop3h 30mFrontier
Mon 4/2812:40 pmPHL - DEN
Nonstop4h 20mFrontier
Deal found 3/30$157
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/111:59 pmDEN - PHL
Nonstop3h 36mUnited Airlines
Tue 5/68:00 amPHL - DEN
Nonstop4h 17mUnited Airlines
Deal found 3/31$171
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/131:42 pmDEN - PHL
Nonstop3h 47mAmerican Airlines
Tue 5/207:40 pmPHL - DEN
Nonstop4h 13mAmerican Airlines
Deal found 3/30$176
This JetBlue deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/310:39 pmDEN - PHL
1 stop9h 02mJetBlue
Sat 5/106:00 amPHL - DEN
1 stop8h 23mJetBlue
Deal found 3/30$210
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2912:50 pmDEN - PHL
2 stops7h 20mSouthwest
Wed 4/305:25 amPHL - DEN
Nonstop4h 10mSouthwest
Deal found 3/30$252
This Delta deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/156:10 amDEN - PHL
1 stop5h 43mDelta
Tue 4/227:25 pmPHL - DEN
1 stop6h 15mDelta
Deal found 3/30$257
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/262:31 pmASE - PHL
1 stop8h 28mAmerican Airlines
Tue 7/86:46 amPHL - ASE
1 stop9h 11mAmerican Airlines
Deal found 3/30$312
This Booking.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:30 pmDEN - PHL
1 stop14h 29mMultiple Airlines
Tue 5/64:05 pmPHL - DEN
1 stop8h 26mMultiple Airlines
Deal found 3/30$324
This Sun Country Air deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:30 pmDEN - PHL
1 stop14h 29mSun Country Air
Sun 5/48:00 amPHL - DEN
1 stop11h 21mSun Country Air
Deal found 3/31$330
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:19 pmDRO - PHL
1 stop9h 58mAmerican Airlines
Mon 9/296:55 pmPHL - DRO
1 stop7h 11mAmerican Airlines
Deal found 3/30$338
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/81:35 pmMTJ - PHL
1 stop8h 00mUnited Airlines
Sat 5/103:46 pmPHL - MTJ
1 stop7h 03mUnited Airlines
Deal found 3/30$343
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/256:59 pmGJT - PHL
1 stop8h 51mAmerican Airlines
Wed 7/307:00 pmPHL - GJT
1 stop7h 17mAmerican Airlines
Deal found 3/30$349

Cheapflights Fare Finder

Customize your flight search to find flights from Colorado to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 31, 2025.
Use the filters below to find and compare flights from Colorado to Delaware that are best for you.

Fly from

Colorado

Fly to

Delaware

Route

Depart

Return

Price

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Wed 4/16

11:45 pm-5:15 am

Nonstop3h 30m

Philadelphia

Mon 4/28

12:40 pm-3:00 pm

Nonstop4h 20m

$157

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/1

11:59 pm-5:35 am

Nonstop3h 36m

Philadelphia

Tue 5/6

8:00 am-10:17 am

Nonstop4h 17m

$171

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 5/13

1:42 pm-7:29 pm

Nonstop3h 47m

Philadelphia

Tue 5/20

7:40 pm-9:53 pm

Nonstop4h 13m

$176

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Sat 5/3

10:39 pm-9:41 am

1 stop9h 02m

Philadelphia

Sat 5/10

6:00 am-12:23 pm

1 stop8h 23m

$210

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 4/29

12:50 pm-10:10 pm

2 stops7h 20m

Philadelphia

Wed 4/30

5:25 am-7:35 am

Nonstop4h 10m

$252

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Tue 4/15

6:10 am-1:53 pm

1 stop5h 43m

Philadelphia

Tue 4/22

7:25 pm-11:40 pm

1 stop6h 15m

$257

AspenPhiladelphia

ASE - PHL

ASEPHL

Aspen Pitkin County

Thu 6/26

2:31 pm-12:59 am

1 stop8h 28m

Philadelphia

Tue 7/8

6:46 am-1:57 pm

1 stop9h 11m

$312

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/1

6:30 pm-10:59 am

1 stop14h 29m

Philadelphia

Tue 5/6

4:05 pm-10:31 pm

1 stop8h 26m

$324

DenverPhiladelphia

DEN - PHL

DENPHL

Denver Intl

Thu 5/1

6:30 pm-10:59 am

1 stop14h 29m

Philadelphia

Sun 5/4

8:00 am-5:21 pm

1 stop11h 21m

$330

DurangoPhiladelphia

DRO - PHL

DROPHL

Durango La Plata County

Mon 9/22

7:19 pm-7:17 am

1 stop9h 58m

Philadelphia

Mon 9/29

6:55 pm-12:06 am

1 stop7h 11m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 53 results
1
2
3
...
6

Best time to book a flight from Colorado to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Delaware

What is the cheapest time of day to fly from CO to DE?

Find hourly flight availability from Colorado to Delaware. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Delaware as you normally would.

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated March 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Colorado to Delaware to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Crew

8.5

Food

7.1

Comfort

7.9

Overall

8.0

Entertainment

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Colorado to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Colorado to Delaware one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $84. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Colorado to Delaware for a low price.

  • Can I find deals for flights from Colorado to Delaware that include hotel bookings?

    Yes. In addition to deals on Colorado to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Delaware.

  • Can I find deals for business class flights from Colorado to Delaware?

    Yes. Cheapflights offers flight deals from Colorado to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Miami flights
Newark to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Miami flights
Newark to Orlando flights
Newark to Las Vegas flights
Dallas/Fort Worth to Seattle flights
LaGuardia to Orlando flights
Dallas/Fort Worth to LaGuardia flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Orlando flights
Newark to Los Angeles flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
Dallas/Fort Worth to O'Hare Intl flights
Newark to Seattle flights
Dallas/Fort Worth to Las Vegas flights
Newark to Dallas/Fort Worth flights
LaGuardia to Atlanta flights
Denver to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to Seattle flights
Newark to Tampa flights
Dallas/Fort Worth to Newark flights
John F Kennedy Intl to San Francisco flights
Seattle to Las Vegas flights
LaGuardia to O'Hare Intl flights
John F Kennedy Intl to West Palm Beach flights
San Francisco to Newark flights
Dallas/Fort Worth to Orlando flights
Seattle to Newark flights
Atlanta to LaGuardia flights
John F Kennedy Intl to Sky Harbor Intl flights
O'Hare Intl to LaGuardia flights
Los Angeles to LaGuardia flights
Los Angeles to Seattle flights
Newark to New Orleans flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to O'Hare Intl flights
LaGuardia to Los Angeles flights
O'Hare Intl to Dallas/Fort Worth flights
Seattle to Los Angeles flights
John F Kennedy Intl to Denver flights
Atlanta to Las Vegas flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.