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Cheap flights from Colorado to Illinois from $34

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Illinois departing on 12/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Colorado to Illinois

Cheap round-trip flights

These are some of the best round-trip flight deals from Colorado to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Colorado to Illinois.

Cheap last minute flights

Planning a quick getaway from Colorado to Illinois? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Illinois, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Colorado to Illinois

Find recent round-trip train or bus tickets from Colorado to Illinois.

All round-trip flight deals to Illinois

The cheapest plane tickets to Illinois found on KAYAK recently.
8:55 pm - 12:17 amDEN-MDW
2h 22mnonstop
7:05 am - 8:59 amMDW-DEN
2h 54mnonstop
$57Frontier
Find Deal
Wed, Feb 5 - Wed, Feb 26
8:55 pm - 12:13 amDEN-MDW
2h 18mnonstop
8:15 am - 10:07 amMDW-DEN
2h 52mnonstop
$58Frontier
Find Deal
Wed, Jan 8 - Wed, Jan 15
8:07 am - 11:45 amDEN-ORD
2h 38mnonstop
5:35 pm - 7:16 pmORD-DEN
2h 41mnonstop
$139American Airlines
Find Deal
Wed, Jan 15 - Sat, Jan 18
4:00 pm - 7:24 pmDEN-ORD
2h 24mnonstop
8:42 am - 10:34 amORD-DEN
2h 52mnonstop
$163American Airlines
Find Deal
Thu, Jan 9 - Tue, Jan 14
8:10 pm - 11:46 pmDEN-ORD
2h 36mnonstop
11:53 am - 5:10 pmORD-DEN
6h 17m1 stop
Fri, Dec 27 - Fri, Jan 3
11:23 am - 2:54 pmDEN-ORD
2h 31mnonstop
2:30 pm - 4:20 pmORD-DEN
2h 50mnonstop
$184United Airlines
Find Deal
Tue, Dec 10 - Tue, Dec 17
3:06 pm - 6:43 pmDEN-ORD
2h 37mnonstop
9:40 pm - 11:34 pmORD-DEN
2h 54mnonstop
$189United Airlines
Find Deal
Tue, Dec 24 - Wed, Jan 1
6:30 pm - 9:45 pmDEN-MDW
2h 15mnonstop
9:15 pm - 11:00 pmMDW-DEN
2h 45mnonstop
$193Southwest
Find Deal
Thu, Jan 9 - Sun, Jan 12
11:00 am - 6:52 pmDEN-ORD
6h 52m1 stop
4:21 pm - 6:23 pmORD-DEN
3h 02mnonstop
Thu, Dec 26 - Sat, Jan 4
5:20 pm - 8:40 pmDEN-MDW
2h 20mnonstop
7:40 pm - 9:25 pmMDW-DEN
2h 45mnonstop
$210Southwest
Find Deal
Thu, Dec 12 - Sat, Dec 14
8:55 pm - 12:13 amDEN-MDW
2h 18mnonstop
$34Frontier
Find Deal
Tue, Dec 10
8:55 pm - 12:13 amDEN-MDW
2h 18mnonstop
$35Frontier
Find Deal
Wed, Dec 11
3:55 pm - 7:31 pmDEN-ORD
2h 36mnonstop
$70United Airlines
Find Deal
Wed, Jan 8
6:10 pm - 9:30 pmDEN-MDW
2h 20mnonstop
$70Southwest
Find Deal
Sat, Feb 8
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
$79United Airlines
Find Deal
Tue, Jan 14
6:53 am - 4:09 pmDEN-MLI
8h 16m1 stop
$84American Airlines
Find Deal
Tue, Dec 17
7:00 am - 10:30 amDEN-MDW
2h 30mnonstop
$90Southwest
Find Deal
Sat, Jan 11
6:30 am - 4:03 pmDEN-MLI
8h 33m1 stop
$94American Airlines
Find Deal
Sun, Jan 19
12:35 am - 9:24 amDEN-ORD
7h 49m1 stop
$221JetBlue
Find Deal
Tue, Dec 3
12:44 am - 9:26 amDEN-ORD
7h 42m1 stop
$237JetBlue
Find Deal
Tue, Dec 31
8:50 am - 7:50 pmDEN-MDW
10h 00m1 stop
7:15 am - 9:05 amMDW-DEN
2h 50mnonstop
$173Frontier
Find Deal
Mon, Dec 2 - Thu, Dec 5
7:23 am - 6:51 pmDEN-STL
10h 28m1 stop
6:46 pm - 8:22 pmSTL-DEN
2h 36mnonstop
$201Frontier
Find Deal
Mon, Dec 2 - Wed, Dec 4
10:28 am - 7:01 pmDEN-ORD
7h 33m1 stop
7:25 am - 9:26 amORD-DEN
3h 01mnonstop
Mon, Dec 2 - Mon, Dec 9
7:49 am - 3:16 pmDEN-MLI
6h 27m1 stop
8:57 am - 10:35 amMLI-DEN
2h 38mnonstop
$369United Airlines
Find Deal
Fri, Nov 29 - Fri, Dec 6
10:28 am - 7:01 pmDEN-ORD
7h 33m1 stop
3:41 pm - 9:22 pmORD-DEN
6h 41m1 stop
Mon, Dec 2 - Mon, Dec 9
7:49 am - 3:16 pmDEN-MLI
6h 27m1 stop
3:55 pm - 7:40 pmMLI-DEN
4h 45m1 stop
$378United Airlines
Find Deal
Fri, Nov 29 - Fri, Dec 6
7:00 am - 10:42 amDEN-ORD
2h 42mnonstop
7:00 am - 1:54 pmORD-DEN
7h 54m1 stop
$395American Airlines
Find Deal
Mon, Dec 2 - Tue, Dec 3
10:45 am - 2:15 pmDEN-ORD
2h 30mnonstop
7:10 pm - 9:15 pmORD-DEN
3h 05mnonstop
$491Southwest
Find Deal
Thu, Nov 28 - Wed, Dec 4
6:05 am - 1:00 pmDEN-ORD
5h 55m1 stop
7:10 pm - 9:15 pmORD-DEN
3h 05mnonstop
$500Southwest
Find Deal
Thu, Nov 28 - Wed, Dec 4
2:44 pm - 9:39 pmDEN-MLI
5h 55m1 stop
6:34 pm - 10:14 amMLI-DEN
16h 40m1 stop
$795American Airlines
Find Deal
Mon, Dec 2 - Fri, Dec 6
8:55 pm - 12:17 amDEN-MDW
2h 22mnonstop
7:05 am - 8:59 amMDW-DEN
2h 54mnonstop
$57Frontier
Find Deal
Wed, Feb 5 - Wed, Feb 26
6:00 am - 9:16 amDEN-STL
2h 16mnonstop
7:09 pm - 8:37 pmSTL-DEN
2h 28mnonstop
$57Frontier
Find Deal
Wed, Jan 22 - Sat, Jan 25
8:55 pm - 12:13 amDEN-MDW
2h 18mnonstop
8:15 am - 10:07 amMDW-DEN
2h 52mnonstop
$58Frontier
Find Deal
Wed, Jan 8 - Wed, Jan 15
8:55 pm - 12:17 amDEN-MDW
2h 22mnonstop
6:40 am - 8:32 amMDW-DEN
2h 52mnonstop
$62Frontier
Find Deal
Sat, Feb 22 - Sat, Mar 1
8:07 am - 11:45 amDEN-ORD
2h 38mnonstop
5:35 pm - 7:16 pmORD-DEN
2h 41mnonstop
$139American Airlines
Find Deal
Wed, Jan 15 - Sat, Jan 18
6:00 am - 9:36 amDEN-ORD
2h 36mnonstop
5:35 pm - 7:16 pmORD-DEN
2h 41mnonstop
$140American Airlines
Find Deal
Sat, Jan 11 - Sat, Jan 18
8:29 pm - 11:59 pmDEN-ORD
2h 30mnonstop
7:10 am - 9:00 amORD-DEN
2h 50mnonstop
$168United Airlines
Find Deal
Wed, Jan 8 - Fri, Jan 10
11:23 am - 2:54 pmDEN-ORD
2h 31mnonstop
2:30 pm - 4:20 pmORD-DEN
2h 50mnonstop
$184United Airlines
Find Deal
Tue, Dec 10 - Tue, Dec 17
6:30 pm - 9:45 pmDEN-MDW
2h 15mnonstop
9:15 pm - 11:00 pmMDW-DEN
2h 45mnonstop
$193Southwest
Find Deal
Thu, Jan 9 - Sun, Jan 12
10:30 am - 1:50 pmDEN-MDW
2h 20mnonstop
10:40 pm - 12:20 amMDW-DEN
2h 40mnonstop
$198Southwest
Find Deal
Wed, Dec 25 - Thu, Jan 2

American Airlines flights from Colorado to Illinois

Our best American Airlines deals on Colorado to Illinois flight tickets
American Airlines
Jan 15
DEN8:07 amDenver Intl
2h 38m
ORD11:45 amChicago O'Hare Intl
Jan 18
ORD5:35 pmChicago O'Hare Intl
2h 41m
DEN7:16 pmDenver Intl
American Airlines
Jan 9
DEN4:00 pmDenver Intl
2h 24m
ORD7:24 pmChicago O'Hare Intl
Jan 14
ORD8:42 amChicago O'Hare Intl
2h 52m
DEN10:34 amDenver Intl
American Airlines
Jan 15
DEN8:07 amDenver Intl
2h 38m
ORD11:45 amChicago O'Hare Intl
Jan 19
ORD12:44 pmChicago O'Hare Intl
2h 44m
DEN2:28 pmDenver Intl

Delta flights from Colorado to Illinois

Our best Delta deals on Colorado to Illinois flight tickets
Delta
Jan 9
DEN2:21 pmDenver Intl
6h 37m
1 stop
ORD9:58 pmChicago O'Hare Intl
Jan 14
ORD6:15 amChicago O'Hare Intl
8h 01m
1 stop
DEN1:16 pmDenver Intl
Delta
Dec 11
DEN12:50 amDenver Intl
5h 56m
1 stop
ORD7:46 amChicago O'Hare Intl
Dec 17
ORD10:17 amChicago O'Hare Intl
6h 55m
1 stop
DEN4:12 pmDenver Intl
Delta
Dec 10
DEN12:55 amDenver Intl
6h 24m
1 stop
ORD8:19 amChicago O'Hare Intl
Dec 14
ORD10:10 amChicago O'Hare Intl
6h 58m
1 stop
DEN4:08 pmDenver Intl

See travel insights to Illinois from

How to get the cheapest flight ticket from Colorado to Illinois

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

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Colorado is in April. Flight prices, which tend to average around $115, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $136.

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

The cheapest day to depart from Colorado to Illinois is on a Wednesday when prices can be found for as low as $144. Flights from Colorado to Illinois on a Sunday will generally be more expensive and average around $201. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Colorado to Illinois during this time can be as low as $150. Flights at noon are often more expensive with an average ticket price of $198.

What is the cheapest Colorado to Illinois flight route?

Fly from Denver Intl to Chicago Midway for the best Colorado - Illinois flight prices

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

There are 4 cabin classes available to choose from on Colorado to Illinois 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 Illinois flights?

You could potentially save up to 89% on your flight if you consider stops on a Colorado to Illinois flight.

Cheap Colorado to Illinois flight deals and tips

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

Best Price Found

$34

Fastest flight time

2h 00m

Direct flights

Every day

Airports in Illinois

4 airports
The best one-way flight to Illinois from Colorado in the past 72 hours is $34. The best round-trip flight deal from Colorado to Illinois found on momondo in the last 72 hours is $57.
The fastest flight from Colorado to Illinois takes 2h 00m
Direct flights go from Colorado to Illinois every day.
There are 4 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL), Moline Quad-City (MLI)

  • When did momondo last update prices for flights from Colorado to Illinois?

    Prices for flights from Colorado to Illinois are updated daily.

  • How many operators does momondo search for flights from Colorado to Illinois?

  • How old do you have to be to fly from Colorado to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The required travel and health documents for your Illinois 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 Illinois. 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 Illinois?


Best airlines flying from Colorado to Illinois

Compare and see reviews for airlines that fly from Colorado to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $38Free CancellationRating
6.1
3,523 reviews
Search Frontier flights
Allegiant AirPriceFrom $86Free CancellationRating
7.3
843 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $139Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $142Free CancellationRating
7.4
9,146 reviews
Search United Airlines flights
SouthwestPriceFrom $143Free CancellationRating
8.1
4,979 reviews
Search Southwest flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Colorado to Illinois. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Colorado to Illinois 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 Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Colorado.

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

If you are not ready to book a flight from Colorado to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.


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