HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Illinois to Colorado from $34

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 4/29. 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.
ORD — DEN
Apr 21 — Apr 281
From?
To?
Sun 4/21
Sun 4/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Travelers have found it’s best to book a flight 29 days in advance to save up to 32% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 29 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Illinois to Colorado 1-2 weeks in advance for as low as $198, or $323 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Colorado. Flights to Colorado from Illinois in January are about $213 on average during January, but can be found for as low as $50.

When is the cheapest time to fly from Illinois to Colorado (IL - CO)?

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

Cheap Frontier flights from Illinois to Colorado

Explore cheap flight options specifically provided by Frontier for the route between Illinois and Colorado. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Take a peek at the cheapest Frontier flights we've detected traveling from Illinois to Colorado. Come back soon if you're not finding the exact deal you're looking for.
Thu 4/256:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 4/279:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$56
Wed 4/246:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/299:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/14$57
Thu 4/2510:53 pmMDW - DEN
Nonstop2h 48mFrontier
Sat 4/271:11 pmDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$58
Mon 4/225:30 amMDW - DEN
Nonstop2h 46mFrontier
Wed 4/248:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$60
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Sun 5/129:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/16$65
Sat 5/48:04 pmSTL - DEN
Nonstop2h 31mFrontier
Sat 5/116:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 4/15$66
Fri 5/106:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 5/139:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$67
Thu 5/29:26 amMDW - DEN
Nonstop2h 47mFrontier
Mon 5/68:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$68
Tue 4/304:50 pmSTL - DEN
Nonstop2h 30mFrontier
Mon 5/66:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 4/15$69

Cheap Delta flights from Illinois to Colorado

Explore cheap flight options specifically provided by Delta for the route between Illinois and Colorado. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Some of the lowest-priced Delta flights we've found at this time heading from Illinois to Colorado. Check back soon if you're not seeing flights that suit your needs.
Fri 6/79:29 amMDW - DEN
1 stop7h 36mDelta
Tue 6/116:00 amDEN - MDW
1 stop6h 44mDelta
Deal found 4/14$176
Sat 5/115:07 pmSTL - DEN
1 stop7h 03mDelta
Fri 5/1712:30 amDEN - STL
1 stop7h 35mDelta
Deal found 4/15$178
Sun 5/266:07 amORD - DEN
1 stop4h 59mDelta
Fri 5/3112:59 amDEN - ORD
1 stop7h 00mDelta
Deal found 4/15$181
Wed 6/59:46 amMDW - DEN
1 stop5h 19mDelta
Fri 6/712:35 amDEN - MDW
1 stop7h 13mDelta
Deal found 4/15$185
Tue 4/233:50 pmORD - DEN
1 stop5h 06mDelta
Tue 4/2312:45 amDEN - ORD
1 stop6h 34mDelta
Deal found 4/15$208
Mon 4/225:20 pmORD - DEN
1 stop6h 53mDelta
Tue 4/2312:45 amDEN - ORD
1 stop6h 34mDelta
Deal found 4/16$258
Tue 4/2310:20 amSTL - DEN
1 stop4h 45mDelta
Mon 4/2912:45 amDEN - STL
1 stop7h 11mDelta
Deal found 4/15$268
Mon 4/226:20 amORD - DEN
1 stop4h 59mDelta
Thu 4/256:00 amDEN - ORD
1 stop7h 15mDelta
Deal found 4/16$303

Cheap Illinois to Colorado flights in April & May 2024

Find cheap flight options from Illinois to Colorado specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,165,818 searches. Prices were last updated on April 16, 2024.
Check out some of the best flight deals from Illinois to Colorado in 2024. For more flight deals, be sure to check back very soon.
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/229:41 pmDEN - ORD
Nonstop2h 32mFrontier
Deal found 4/15$59
Mon 4/225:30 amMDW - DEN
Nonstop2h 46mFrontier
Wed 4/248:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$60
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/229:41 pmDEN - ORD
Nonstop2h 32mFrontier
Deal found 4/15$60
Sat 4/276:27 pmORD - DEN
Nonstop2h 55mFrontier
Sun 4/289:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$62
Wed 5/225:01 amMDW - DEN
Nonstop2h 48mFrontier
Wed 5/297:44 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 4/15$63
Wed 5/225:01 amMDW - DEN
Nonstop2h 48mFrontier
Tue 5/2810:23 amDEN - MDW
Nonstop2h 26mFrontier
Deal found 4/15$65
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Sun 5/129:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/16$65
Sun 5/195:01 amMDW - DEN
Nonstop2h 48mFrontier
Tue 5/2110:23 amDEN - MDW
Nonstop2h 26mFrontier
Deal found 4/15$66
Sat 5/48:04 pmSTL - DEN
Nonstop2h 31mFrontier
Sat 5/116:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 4/15$66

Illinois to Colorado 2024 flight deals

Discover exclusive flight deals for travel between Illinois and Colorado in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Check out some of the best flight deals from Illinois to Colorado in 2024. For more flight deals, be sure to check back very soon.
Mon 4/225:30 amMDW - DEN
Nonstop2h 46mFrontier
Mon 4/298:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$70
Tue 4/3011:47 amORD - DEN
1 stop24h 24mFrontier
Sat 5/49:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$70
Sun 5/126:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 5/149:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/16$71
Fri 5/105:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 5/185:41 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 4/15$72
Sat 5/118:04 pmSTL - DEN
Nonstop2h 31mFrontier
Mon 5/1310:56 pmDEN - STL
1 stop10h 13mFrontier
Deal found 4/15$72
Wed 4/246:27 pmORD - DEN
Nonstop2h 55mFrontier
Sun 4/289:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$72
Sat 4/209:29 pmMDW - DEN
Nonstop2h 47mFrontier
Tue 4/236:38 pmDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$73
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 4/249:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$73
Fri 5/37:45 pmORD - DEN
1 stop15h 35mMultiple Airlines
Mon 5/69:27 pmDEN - ORD
Nonstop2h 29mMultiple Airlines
Deal found 4/14$74

Non-stop flights to Colorado from Illinois

Discover non-stop flight options from Illinois to Colorado. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
For a quicker trip, book one of these direct flights from Illinois to Colorado. Users seeking other options on flights from Illinois to Colorado should update the search form at the top of the page.
Sat 5/118:04 pmSTL - DEN
Nonstop2h 31mFrontier
Tue 5/1412:45 pmDEN - STL
Nonstop2h 05mFrontier
Deal found 4/15$47
Tue 5/76:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$47
Wed 5/15:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 5/41:11 pmDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$48
Wed 5/16:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/89:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$48
Wed 5/16:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/19:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$50
Wed 5/18:04 pmSTL - DEN
Nonstop2h 31mFrontier
Tue 5/712:45 pmDEN - STL
Nonstop2h 05mFrontier
Deal found 4/16$53
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$55
Thu 5/29:26 amMDW - DEN
Nonstop2h 47mFrontier
Tue 5/78:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$56
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 5/149:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$56

Illinois to Colorado flights leaving soon

Find last-minute flight options from Illinois to Colorado for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Check out these flights departing soon from Illinois to Colorado. Users should examine the flight details to ensure there are no surprises.
Thu 4/256:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 4/279:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$56
Wed 4/246:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/299:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/14$57
Thu 4/2510:53 pmMDW - DEN
Nonstop2h 48mFrontier
Sat 4/271:11 pmDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$58
Mon 4/225:30 amMDW - DEN
Nonstop2h 46mFrontier
Wed 4/248:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$60
Thu 4/256:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/299:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$67
Wed 4/245:30 amMDW - DEN
Nonstop2h 46mFrontier
Thu 4/255:11 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 4/15$67
Thu 4/256:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 4/279:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/15$68
Thu 4/2510:53 pmMDW - DEN
Nonstop2h 48mFrontier
Sun 4/285:06 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 4/15$68
Mon 4/225:30 amMDW - DEN
Nonstop2h 46mFrontier
Mon 4/298:11 amDEN - MDW
Nonstop2h 27mFrontier
Deal found 4/15$70

One-way flights to Colorado from Illinois

Search for one-way flight options from Illinois to Colorado. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Users in need of a one-way flight from Illinois to Colorado can choose from these deals. Those seeking round-trip flights from Illinois to Colorado should utilize the search form at the the top of the page.
Mon 4/296:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/15$34
Mon 4/295:30 amMDW - DEN
Nonstop2h 46mFrontier
Deal found 4/15$34
Mon 5/66:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/16$35
Wed 5/158:04 pmSTL - DEN
Nonstop2h 31mFrontier
Deal found 4/15$35
Mon 4/295:30 amMDW - DEN
Nonstop2h 46mFrontier
Deal found 4/15$35
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/15$36
Tue 5/218:00 amORD - DEN
Nonstop2h 55mFrontier
Deal found 4/15$37
Sat 6/1510:11 pmORD - DEN
Nonstop2h 57mFrontier
Deal found 4/15$38
Tue 5/74:57 pmBMI - DEN
Nonstop2h 32mFrontier
Deal found 4/16$39

Find flights from Illinois to Colorado within your budget

Customize your flight search to find flights from Illinois to Colorado 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 3,165,818 searches. Data last updated April 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$65 - $158

Route

Depart

Return

Price

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Wed 5/8

Nonstop2h 55m

Denver Intl

Sun 5/12

Nonstop2h 29m

$65

Chicago MidwayDenver Intl

MDW - DEN

MDWDEN

Chicago Midway

Wed 5/22

Nonstop2h 48m

Denver Intl

Tue 5/28

Nonstop2h 26m

$65

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Wed 5/8

Nonstop2h 55m

Denver Intl

Fri 5/10

Nonstop2h 29m

$66

Lambert-St LouisDenver Intl

STL - DEN

STLDEN

Lambert-St Louis

Sat 5/4

Nonstop2h 31m

Denver Intl

Sat 5/11

Nonstop2h 06m

$66

Chicago MidwayDenver Intl

MDW - DEN

MDWDEN

Chicago Midway

Sun 5/19

Nonstop2h 48m

Denver Intl

Tue 5/21

Nonstop2h 26m

$66

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 5/3

1 stop15h 35m

Denver Intl

Mon 5/6

Nonstop2h 29m

$74

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 5/3

1 stop15h 35m

Denver Intl

Sat 5/4

Nonstop2h 29m

$80

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Wed 5/22

Nonstop2h 42m

Denver Intl

Wed 5/22

Nonstop2h 30m

$157

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 4/26

1 stop14h 00m

Denver Intl

Sun 4/28

1 stop9h 08m

$158

Flights are sorted by cheapest first

Deals found on 4/16

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated April 16, 2024.
Peruse reviews from past customers who have flown with Frontier, Delta and United Airlines from Illinois to Colorado to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,219 reviews
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Alaska Airlines
8.1
Very good
9,085 reviews
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Delta
8.1
Very good
11,123 reviews
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

WestJet
7.5
Good
3,007 reviews
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

United Airlines
7.4
Good
11,360 reviews
Southwest
8.2
Very good
6,219 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.9

Crew

8.8

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Related info for your journey

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

  • Can I find flights from Illinois to Colorado for under $100 on Cheapflights?

    Yes, there are multiple flights from Illinois to Colorado for under $100. The cheapest flight booked recently is on Frontier for just $65, but on average you can expect to pay $69.

  • Are there nonstop flights from Illinois to Colorado for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Illinois to Colorado under $100. A good price for a nonstop flight from Illinois to Colorado is less than $55.

  • Are there last-minute flights available from Illinois to Colorado for under $100?

    There are currently 20+ open flights from Illinois to Colorado within the next 7 days for less than $100.

  • What days are nonstop flights available from Illinois to Colorado?

    Nonstop flights are available for this route on the following days: Tuesday, Thursday, Friday, Saturday.

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

    On average 17 flights depart from Illinois to Colorado per day.
    Early Morning (Midnight to 6am) - 12% of flight departures
    Morning (6am - Noon) - 18% of flight departures
    Afternoon (Noon - 6pm) - 59% of flight departures
    Evening (6pm - Midnight) - 12% of flight departures

  • How long is the flight from Illinois to Colorado?

    Airlines like Frontier fly from Illinois to Colorado in about 2h 55m. The time it takes to get you to your destination is usually consistent. The distance between Illinois and Colorado is about 891 mi. Generally, flights for this route are nonstop.

  • What does ORD to DEN mean?

    ORD stands for Chicago O'Hare Intl Airport, while DEN stands for Denver Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Colorado Springs Airport (COS), Grand Junction Regnl Airport (GJT), Durango La Plata County Airport (DRO), Aspen Pitkin County Airport (ASE), Montrose County Airport (MTJ).

  • Can I find deals for flights from Illinois to Colorado that include extra baggage allowance?

    The amount of baggage you can bring depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Illinois to Colorado with specific airlines?

    Yes, Cheapflights allows you to browse and filter flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

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

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

  • Can I find deals for flights from Illinois to Colorado that allow pets onboard?

    Many airlines do offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Illinois to Colorado?

    Yes, you can often find last-minute deals on Illinois to Colorado flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Illinois to Colorado flight deals updated?

    The Illinois to Colorado flight deals you see on this page were last updated on 4/16.

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 Illinois to Colorado
See prices for flight routes from nearby airports that may be better suited for you.

Newark to Fort Lauderdale flights
LaGuardia to Miami flights
LaGuardia to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Orlando flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
Newark to Orlando flights
Los Angeles to Newark flights
Newark to Los Angeles flights
Los Angeles to John F Kennedy Intl flights
Seattle to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Miami flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
Seattle to Los Angeles flights
O'Hare Intl to Las Vegas flights
Dallas/Fort Worth to Seattle flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Orlando flights
Fort Lauderdale to Newark flights
Fort Lauderdale to LaGuardia flights
John F Kennedy Intl to Fort Lauderdale flights
Boston to Orlando flights
Newark to O'Hare Intl flights
San Francisco to Las Vegas flights
LaGuardia to Las Vegas flights
Seattle to Sky Harbor Intl flights
Los Angeles to Honolulu flights
Los Angeles to LaGuardia flights
O'Hare Intl to Seattle flights
San Francisco to Newark flights
Philadelphia to Orlando flights
Los Angeles to O'Hare Intl flights
John F Kennedy Intl to O'Hare Intl flights
Orlando to LaGuardia flights
Los Angeles to Las Vegas flights
Newark to San Francisco flights
Boston to Fort Lauderdale flights
LaGuardia to O'Hare Intl flights
Atlanta to Las Vegas flights
Boston to Miami flights
Newark to Tampa flights
LaGuardia to Los Angeles flights
Los Angeles to Miami flights
Dallas/Fort Worth to Newark flights
LaGuardia to Tampa flights

Top 7 airlines flying from Illinois to Colorado

Discover the top 7 airlines that operate flights from Illinois to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$35Average$133FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$97Average$166FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Allegiant AirCheapest$98Average$194FlexibilityNo cancel feeOn-time88%
Search Allegiant Air flights
United AirlinesCheapest$100Average$496FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$109Average$474FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Denver Air ConnectionCheapest$144Average$247FlexibilityNo cancel feeOn-timeN/A
Search Denver Air Connection flights
DeltaCheapest$195Average$433FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
USA to Dhaka flights
Las Vegas to Denver flights
Phoenix to Nashville flights
Los Angeles to Barcelona flights
Dallas to Las Vegas flights
Chicago to San Diego flights
Los Angeles to Rome flights
New York to Orlando flights
Los Angeles to Hawaii flights
Miami to Buenos Aires flights
Fort Lauderdale to Dallas flights
Illinois to Connecticut flights

Search flights from Illinois to Colorado by cabin class

Find flights from Illinois to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Illinois to Colorado

Find hourly flight availability from Illinois to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 16, 2024.
6%of flight departuresEarly morningMidnight to 6 am
37%of flight departuresMorning6 am to noon
35%of flight departuresAfternoonNoon to 6 pm
22%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Bodø
Flights to Bar Harbor
Flights to Bastia Poretta
Flights to Dharamshala Kangra
Flights to Biarritz Parme
Flights to Menorca/Mahon
Flights to Milas–Bodrum
Flights to Dipolog
Flights to Kagoshima
Flights to Edremit/Korfez
Flights to Bourgas
Flights to Ordu/Giresun
Flights to Chios
Flights to Argostoli Cephalonia
Flights to Barrow Wiley Post/W.Rogers
Flights to Kristiansand Kjevik
Flights to Zakynthos Dionsios Salomos
Flights to Batumi
Flights to Guilin
Flights to Pau Pyrénées
Flights to Fez Sais
Flights to Kos
Flights to Mytilene
Flights to Norwich Arpt

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Colorado?

Deals for Illinois to Colorado flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Colorado?

Millions of users choose and trust Cheapflights to book the best flight deals from Illinois to Colorado for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Illinois to Colorado with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Illinois to Colorado, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Illinois to Colorado become cheaper?

Yes, Cheapflights offers price alerts on Illinois to Colorado flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.
View all available airlines