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Cheap flights from Colorado to Illinois from $39

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 5/16. 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.
DEN — ORD
May 1 — May 81
From?
To?
Wed 5/1
Wed 5/8
1 adult, Economy
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How far in advance should I book a flight from Colorado to Illinois?

To save up to 20% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Colorado to Illinois from $184 1-2 weeks out and tickets from $289 for flights departing within the next 72 hours.

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

January is one of the best times of the year to fly to Illinois from Colorado. Prices for January average $211 per person but you can even find prices for as low as $50. The most expensive prices can be found in the month of June. Opting for a January flight can save you 38% on your journey compared to booking in June

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

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

Cheap United Airlines flights from Colorado to Illinois

Explore cheap flight options specifically provided by United Airlines for the route between Colorado and Illinois. 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 3,068,117 searches. Data last updated April 26, 2024.
Peruse some of the lowest-priced United Airlines flights we've found from Colorado to Illinois. It's recommended that users confirm their flight details before booking.
Tue 7/27:24 pmDEN - ORD
Nonstop2h 31mUnited Airlines
Sun 7/75:16 amORD - DEN
Nonstop2h 38mUnited Airlines
Deal found 4/24$142
Fri 5/248:28 pmDEN - ORD
Nonstop2h 31mUnited Airlines
Mon 5/275:04 amORD - DEN
Nonstop2h 38mUnited Airlines
Deal found 4/25$205
Thu 5/26:25 pmDEN - MLI
Nonstop2h 07mUnited Airlines
Fri 5/105:45 pmMLI - DEN
1 stop6h 34mUnited Airlines
Deal found 4/25$303
Sat 5/48:55 pmDEN - ORD
Nonstop2h 26mUnited Airlines
Sun 5/57:10 amORD - DEN
Nonstop2h 48mUnited Airlines
Deal found 4/25$304
Thu 5/27:50 amDEN - MLI
1 stop6h 21mUnited Airlines
Thu 5/95:45 pmMLI - DEN
1 stop6h 34mUnited Airlines
Deal found 4/25$313
Wed 5/15:40 pmDEN - MLI
Nonstop2h 07mUnited Airlines
Fri 5/105:45 pmMLI - DEN
1 stop6h 34mUnited Airlines
Deal found 4/25$323
Fri 5/106:05 pmDEN - STL
Nonstop2h 04mUnited Airlines
Sun 5/121:37 pmSTL - DEN
Nonstop2h 22mUnited Airlines
Deal found 4/26$329
Sat 10/195:20 pmDEN - MLI
Nonstop2h 03mUnited Airlines
Thu 10/315:42 pmMLI - DEN
1 stop6h 36mUnited Airlines
Deal found 4/24$358
Wed 5/15:40 pmDEN - MLI
Nonstop2h 07mUnited Airlines
Wed 5/86:45 amMLI - DEN
1 stop4h 50mUnited Airlines
Deal found 4/25$378

Cheap Frontier flights from Colorado to Illinois

Explore cheap flight options specifically provided by Frontier for the route between Colorado and Illinois. 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 3,068,117 searches. Data last updated April 26, 2024.
Some of the lowest-priced Frontier flights we've found at this time heading from Colorado to Illinois. Deals frequently update to provide users with more options.
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$57
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$58
Wed 5/89:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$59
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/26$61
Wed 8/219:27 pmDEN - ORD
Nonstop2h 36mFrontier
Sat 8/245:56 pmORD - DEN
Nonstop2h 39mFrontier
Deal found 4/25$66
Sat 5/186:15 amDEN - STL
Nonstop2h 10mFrontier
Sat 5/258:04 pmSTL - DEN
Nonstop2h 31mFrontier
Deal found 4/25$67
Wed 6/55:10 pmDEN - ORD
Nonstop2h 38mFrontier
Sat 6/810:11 pmORD - DEN
Nonstop2h 57mFrontier
Deal found 4/25$68
Fri 5/179:36 pmDEN - ORD
Nonstop2h 32mFrontier
Tue 5/218:00 amORD - DEN
Nonstop2h 55mFrontier
Deal found 4/26$69
Thu 5/165:45 pmDEN - ORD
Nonstop2h 38mFrontier
Tue 5/218:00 amORD - DEN
Nonstop2h 55mFrontier
Deal found 4/26$70

Cheap Colorado to Illinois flights in April & May 2024

Find cheap flight options from Colorado to Illinois specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Prices were last updated on April 26, 2024.
These are some of the best deals we've found on flights to Illinois in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$57
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$58
Tue 5/76:38 pmDEN - MDW
Nonstop2h 27mFrontier
Tue 5/1410:55 pmMDW - DEN
Nonstop2h 48mFrontier
Deal found 4/25$58
Wed 5/89:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$59
Wed 5/88:11 amDEN - MDW
Nonstop2h 27mFrontier
Sat 5/119:29 pmMDW - DEN
Nonstop2h 47mFrontier
Deal found 4/25$59
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$61
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$62
Sat 5/111:11 pmDEN - MDW
Nonstop2h 27mFrontier
Sat 5/119:29 pmMDW - DEN
Nonstop2h 47mFrontier
Deal found 4/25$66
Sat 5/116:41 amDEN - STL
Nonstop2h 06mFrontier
Wed 5/158:04 pmSTL - DEN
Nonstop2h 31mFrontier
Deal found 4/25$66

Colorado to Illinois 2024 flight deals

Discover exclusive flight deals for travel between Colorado and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
These are some of the best deals we've found on flights to Illinois in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$58
Tue 5/76:38 pmDEN - MDW
Nonstop2h 27mFrontier
Tue 5/1410:55 pmMDW - DEN
Nonstop2h 48mFrontier
Deal found 4/25$58
Tue 5/1412:45 pmDEN - STL
Nonstop2h 05mFrontier
Tue 5/2110:44 pmSTL - DEN
Nonstop2h 36mFrontier
Deal found 4/25$58
Wed 5/89:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$59
Wed 5/88:11 amDEN - MDW
Nonstop2h 27mFrontier
Sat 5/119:29 pmMDW - DEN
Nonstop2h 47mFrontier
Deal found 4/25$59
Wed 5/86:41 amDEN - STL
Nonstop2h 06mFrontier
Sat 5/118:04 pmSTL - DEN
Nonstop2h 31mFrontier
Deal found 4/24$59
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$61
Sat 6/15:41 pmDEN - MDW
Nonstop2h 25mFrontier
Tue 6/46:00 amMDW - DEN
Nonstop2h 47mFrontier
Deal found 4/26$61
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$62

Non-stop flights to Illinois from Colorado

Discover non-stop flight options from Colorado to Illinois. 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 3,068,117 searches. Data last updated April 26, 2024.
Consider booking one of these non-stop flights heading from Colorado to Illinois. Users can also choose from other Colorado to Illinois flights by using the search form above.
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$57
Sat 5/186:15 amDEN - STL
Nonstop2h 10mFrontier
Tue 5/2110:44 pmSTL - DEN
Nonstop2h 36mFrontier
Deal found 4/24$57
Sat 5/119:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$58
Tue 5/76:38 pmDEN - MDW
Nonstop2h 27mFrontier
Tue 5/1410:55 pmMDW - DEN
Nonstop2h 48mFrontier
Deal found 4/25$58
Tue 5/1412:45 pmDEN - STL
Nonstop2h 05mFrontier
Tue 5/2110:44 pmSTL - DEN
Nonstop2h 36mFrontier
Deal found 4/25$58
Wed 5/89:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$59
Wed 5/88:11 amDEN - MDW
Nonstop2h 27mFrontier
Sat 5/119:29 pmMDW - DEN
Nonstop2h 47mFrontier
Deal found 4/25$59
Wed 5/86:41 amDEN - STL
Nonstop2h 06mFrontier
Sat 5/118:04 pmSTL - DEN
Nonstop2h 31mFrontier
Deal found 4/24$59
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$61

Colorado to Illinois flights leaving soon

Find last-minute flight options from Colorado to Illinois 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 3,068,117 searches. Data last updated April 26, 2024.
Book one of these great deals on flights from Colorado to Illinois. Tip: verify your flight details before completing your reservation.
Sat 5/49:27 pmDEN - ORD
Nonstop2h 29mFrontier
Mon 5/136:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/26$96
Thu 5/29:27 pmDEN - ORD
Nonstop2h 29mFrontier
Sat 5/46:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$107
Thu 5/25:11 amDEN - MDW
Nonstop2h 25mFrontier
Tue 5/75:30 amMDW - DEN
Nonstop2h 46mFrontier
Deal found 4/24$108
Sat 5/49:27 pmDEN - ORD
Nonstop2h 29mFrontier
Tue 5/711:47 amORD - DEN
1 stop24h 24mFrontier
Deal found 4/24$115
Sat 5/49:27 pmDEN - ORD
Nonstop2h 29mFrontier
Mon 5/66:47 pmORD - DEN
1 stop12h 37mFrontier
Deal found 4/24$116
Wed 5/19:27 pmDEN - ORD
Nonstop2h 29mFrontier
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$117
Mon 5/61:18 pmDEN - ORD
1 stop10h 34mFrontier
Wed 5/86:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/26$118
Mon 5/612:53 amDEN - MDW
1 stop12h 00mFrontier
Wed 5/85:30 amMDW - DEN
Nonstop2h 46mFrontier
Deal found 4/25$118
Mon 5/63:50 pmDEN - ORD
1 stop8h 02mFrontier
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 4/25$119

One-way flights to Illinois from Colorado

Search for one-way flight options from Colorado to Illinois. 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 3,068,117 searches. Data last updated April 26, 2024.
Users traveling one-way from Colorado to Illinois can select one of these great deals. Those needing a return flight from Colorado to Illinois can use the search form above.
Thu 5/165:45 pmDEN - ORD
Nonstop2h 38mFrontier
Deal found 4/25$39
Wed 6/128:38 amDEN - MDW
Nonstop2h 24mFrontier
Deal found 4/25$39
Fri 5/176:26 amDEN - STL
Nonstop2h 10mFrontier
Deal found 4/24$39
Sat 6/155:28 pmDEN - ORD
Nonstop2h 38mFrontier
Deal found 4/26$40
Sat 6/158:23 amDEN - MDW
Nonstop2h 24mFrontier
Deal found 4/26$40
Fri 5/176:26 amDEN - STL
Nonstop2h 10mFrontier
Deal found 4/25$40
Fri 5/179:36 pmDEN - ORD
Nonstop2h 32mFrontier
Deal found 4/25$41
Sat 6/158:23 amDEN - MDW
Nonstop2h 24mFrontier
Deal found 4/25$41
Mon 5/139:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 4/25$44

Find flights from Colorado to Illinois within your budget

Customize your flight search to find flights from Colorado to Illinois 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 3,068,117 searches. Data last updated April 26, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$57 - $172

Route

Depart

Return

Price

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Tue 5/7

Nonstop2h 29m

Chicago O'Hare Intl

Wed 5/8

Nonstop2h 55m

$57

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Sat 5/11

Nonstop2h 29m

Chicago O'Hare Intl

Wed 5/15

Nonstop2h 55m

$58

Denver IntlChicago Midway

DEN - MDW

DENMDW

Denver Intl

Tue 5/7

Nonstop2h 27m

Chicago Midway

Tue 5/14

Nonstop2h 48m

$58

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Wed 5/8

Nonstop2h 29m

Chicago O'Hare Intl

Sat 5/11

Nonstop2h 55m

$59

Denver IntlChicago Midway

DEN - MDW

DENMDW

Denver Intl

Wed 5/8

Nonstop2h 27m

Chicago Midway

Sat 5/11

Nonstop2h 47m

$59

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Tue 5/7

Nonstop2h 29m

Chicago O'Hare Intl

Sat 5/11

Nonstop2h 55m

$61

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Wed 6/12

Nonstop2h 38m

Chicago O'Hare Intl

Fri 6/28

1 stop14h 34m

$92

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Tue 7/2

Nonstop2h 31m

Chicago O'Hare Intl

Sun 7/7

Nonstop2h 38m

$142

Denver IntlChicago O'Hare Intl

DEN - ORD

DENORD

Denver Intl

Mon 5/6

1 stop6h 43m

Chicago O'Hare Intl

Fri 5/10

1 stop22h 55m

$172

Flights are sorted by cheapest first

Deals found on 4/25

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 26, 2024.
Read through reviews of airlines operating flights from Colorado to Illinois, such as United Airlines, Frontier and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Southwest
8.2
Very good
6,173 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Alaska Airlines
8.1
Very good
9,115 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Delta
8.1
Very good
10,966 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

WestJet
7.5
Good
2,981 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

United Airlines
7.4
Good
11,228 reviews
Southwest
8.2
Very good
6,173 reviews
Check prices

Food

7.4

Boarding

8.3

Overall

8.2

Entertainment

7.8

Comfort

8.1

Crew

8.7

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Illinois. 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 Colorado to Illinois for under $100 on Cheapflights?

    Yes, there are multiple flights from Colorado to Illinois for under $100. The cheapest flight booked recently is on Frontier for just $57, but on average you can expect to pay $65.

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

    Cheapflights has at least 20 direct flights from Colorado to Illinois under $100. A good price for a nonstop flight from Colorado to Illinois is less than $62.

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

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

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

    Days when nonstop flights are available for this flight are: Sunday, Monday, Tuesday, Wednesday, Friday, Saturday.

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

    Travelers can expect 31 flights from Colorado to Illinois on average per day.
    Morning (6am - Noon) - 48% of flight departures
    Afternoon (Noon - 6pm) - 32% of flight departures
    Evening (6pm - Midnight) - 19% of flight departures

  • How long is the flight from Colorado to Illinois?

    Airlines like Frontier fly from Colorado to Illinois in about 2h 29m. The time it takes to get you to your destination is usually consistent. Colorado and Illinois are separated by a distance of 891 mi. Most flights are nonstop.

  • What does DEN to ORD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Denver Intl Airport to Chicago O'Hare Intl Airport flight would often be abbreviated as a DEN to ORD flight. Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Colorado to Illinois flight 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 Colorado to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Colorado to Illinois 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 Colorado to Illinois that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Illinois 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 Colorado to Illinois that allow pets onboard?

    Many airlines flying from Colorado to Illinois 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 Colorado to Illinois?

    Yes, you can often find last-minute deals on Colorado to Illinois 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 Colorado to Illinois flight deals updated?

    The Colorado to Illinois flight deals you see on this page were last updated on 4/26.

See more FAQs

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

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Top 6 airlines flying from Colorado to Illinois

Discover the top 6 airlines that operate flights from Colorado to Illinois. 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 3,068,117 searches. Data last updated April 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$25Average$144FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Allegiant AirCheapest$85Average$170FlexibilityNo cancel feeOn-time88%
Search Allegiant Air flights
Spirit AirlinesCheapest$115Average$209FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
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Search flights from Colorado to Illinois by cabin class

Find flights from Colorado to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Colorado to Illinois

Find hourly flight availability from Colorado to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 26, 2024.
10%of flight departuresEarly morningMidnight to 6 am
43%of flight departuresMorning6 am to noon
36%of flight departuresAfternoonNoon to 6 pm
11%of flight departuresEvening6 pm to midnight
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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 Colorado to Illinois?

Deals for Colorado to Illinois 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 Colorado to Illinois?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Colorado to Illinois.

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

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

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from Colorado today and book when prices fit your budget.

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