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Cheap flights from Colorado to Illinois from $38

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 11/17. 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.
12:28 pm - 3:50 pmDEN-MDW
2h 22mnonstop
5:10 am - 6:59 amMDW-DEN
2h 49mnonstop
$70Frontier
Find Deal
Wed, Nov 20 - Sat, Nov 23
1:54 pm - 5:17 pmDEN-MDW
2h 23mnonstop
9:45 am - 11:33 amMDW-DEN
2h 48mnonstop
$71Frontier
Find Deal
Mon, Nov 18 - Wed, Nov 20
12:23 pm - 3:22 pmDEN-PIA
1h 59mnonstop
10:08 am - 11:33 amPIA-DEN
2h 25mnonstop
$89Allegiant Air
Find Deal
Fri, Dec 13 - Mon, Dec 16
12:23 pm - 3:22 pmDEN-PIA
1h 59mnonstop
10:08 am - 11:33 amPIA-DEN
2h 25mnonstop
$90Allegiant Air
Find Deal
Fri, Dec 6 - Mon, Dec 9
8:50 pm - 12:22 amDEN-ORD
2h 32mnonstop
9:36 pm - 11:19 pmORD-DEN
2h 43mnonstop
$131United Airlines
Find Deal
Wed, Dec 4 - Fri, Dec 6
7:45 am - 11:10 amDEN-MDW
2h 25mnonstop
7:55 pm - 9:40 pmMDW-DEN
2h 45mnonstop
$132Southwest
Find Deal
Thu, Nov 21 - Thu, Nov 21
5:05 am - 2:08 pmDEN-ORD
8h 03m1 stop
8:16 pm - 7:44 amORD-DEN
12h 28m1 stop
Thu, Nov 14 - Thu, Nov 21
8:40 am - 12:15 pmDEN-ORD
2h 35mnonstop
7:10 pm - 6:32 amORD-DEN
12h 22m1 stop
Fri, Nov 22 - Mon, Nov 25
9:40 am - 12:48 pmDEN-STL
2h 08mnonstop
4:36 pm - 6:13 pmSTL-DEN
2h 37mnonstop
$177United Airlines
Find Deal
Tue, Jan 28 - Fri, Jan 31
8:25 am - 11:25 amDEN-STL
2h 00mnonstop
7:20 am - 8:55 amSTL-DEN
2h 35mnonstop
$178Southwest
Find Deal
Sat, Dec 14 - Sun, Jan 19
10:11 pm - 1:33 amDEN-MDW
2h 22mnonstop
$38Frontier
Find Deal
Sun, Nov 17
9:45 am - 1:10 pmDEN-MDW
2h 25mnonstop
$39Frontier
Find Deal
Thu, Nov 21
8:50 pm - 12:22 amDEN-ORD
2h 32mnonstop
$66United Airlines
Find Deal
Tue, Dec 3
6:55 am - 10:25 amDEN-MDW
2h 30mnonstop
$66Southwest
Find Deal
Tue, Dec 17
8:20 pm - 11:20 pmDEN-STL
2h 00mnonstop
$66Southwest
Find Deal
Tue, Dec 3
6:00 am - 9:38 amDEN-ORD
2h 38mnonstop
$79United Airlines
Find Deal
Wed, Jan 8
12:55 am - 9:22 amDEN-STL
7h 27m1 stop
$98Delta
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Fri, Dec 6
7:07 pm - 8:51 amDEN-ORD
12h 44m1 stop
$104Delta
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Wed, Nov 20
11:16 pm - 8:07 amDEN-ORD
7h 51m1 stop
$131JetBlue
Find Deal
Wed, Jan 1
12:35 am - 9:18 amDEN-ORD
7h 43m1 stop
$141JetBlue
Find Deal
Fri, Dec 13
9:19 pm - 12:53 amDEN-ORD
2h 34mnonstop
12:21 pm - 2:11 pmORD-DEN
2h 50mnonstop
$92Frontier
Find Deal
Mon, Nov 4 - Wed, Nov 6
6:10 am - 9:44 amDEN-ORD
2h 34mnonstop
12:21 pm - 2:11 pmORD-DEN
2h 50mnonstop
$93Frontier
Find Deal
Mon, Nov 4 - Wed, Nov 6
8:00 am - 7:21 pmDEN-ORD
10h 21m1 stop
4:40 pm - 6:31 pmORD-DEN
2h 51mnonstop
Sun, Nov 3 - Sat, Nov 9
6:25 am - 3:00 pmDEN-ORD
7h 35m1 stop
7:30 am - 4:35 pmORD-DEN
10h 05m2 stops
$323Southwest
Find Deal
Mon, Nov 4 - Wed, Nov 6
5:05 am - 2:57 pmDEN-ORD
8h 52m1 stop
8:20 pm - 10:58 amORD-DEN
15h 38m1 stop
Fri, Nov 1 - Sun, Nov 3
3:24 pm - 9:40 pmDEN-PIA
5h 16m1 stop
10:55 am - 3:05 pmPIA-DEN
5h 10m1 stop
$338United Airlines
Find Deal
Sat, Nov 2 - Tue, Nov 5
4:29 pm - 9:40 pmDEN-PIA
4h 11m1 stop
2:25 pm - 11:34 pmPIA-DEN
10h 09m2 stops
$343United Airlines
Find Deal
Sat, Nov 2 - Tue, Nov 5
11:15 am - 8:31 pmDEN-MLI
8h 16m1 stop
6:05 am - 12:15 pmMLI-DEN
7h 10m1 stop
$358Delta
Find Deal
Sat, Nov 2 - Tue, Nov 5
1:20 pm - 8:31 pmDEN-MLI
6h 11m1 stop
5:10 pm - 11:49 pmMLI-DEN
7h 39m1 stop
$418Delta
Find Deal
Thu, Oct 31 - Sun, Nov 3
1:55 pm - 8:05 pmDEN-MDW
5h 10m1 stop
8:35 pm - 10:20 pmMDW-DEN
2h 45mnonstop
$423Southwest
Find Deal
Mon, Nov 4 - Wed, Nov 6
12:28 pm - 3:50 pmDEN-MDW
2h 22mnonstop
9:45 am - 11:33 amMDW-DEN
2h 48mnonstop
$57Frontier
Find Deal
Tue, Nov 12 - Tue, Nov 19
8:46 am - 12:09 pmDEN-MDW
2h 23mnonstop
9:45 am - 11:33 amMDW-DEN
2h 48mnonstop
$66Frontier
Find Deal
Mon, Nov 11 - Wed, Nov 13
12:23 pm - 3:22 pmDEN-PIA
1h 59mnonstop
10:08 am - 11:33 amPIA-DEN
2h 25mnonstop
$89Allegiant Air
Find Deal
Fri, Dec 13 - Mon, Dec 16
12:23 pm - 3:22 pmDEN-PIA
1h 59mnonstop
10:08 am - 11:33 amPIA-DEN
2h 25mnonstop
$90Allegiant Air
Find Deal
Fri, Dec 6 - Mon, Dec 9
8:50 pm - 12:22 amDEN-ORD
2h 32mnonstop
9:36 pm - 11:19 pmORD-DEN
2h 43mnonstop
$131United Airlines
Find Deal
Wed, Dec 4 - Fri, Dec 6
7:45 am - 11:10 amDEN-MDW
2h 25mnonstop
7:55 pm - 9:40 pmMDW-DEN
2h 45mnonstop
$132Southwest
Find Deal
Thu, Nov 21 - Thu, Nov 21
5:50 am - 9:25 amDEN-ORD
2h 35mnonstop
12:15 pm - 2:05 pmORD-DEN
2h 50mnonstop
$151Southwest
Find Deal
Thu, Nov 28 - Thu, Nov 28
8:50 pm - 12:22 amDEN-ORD
2h 32mnonstop
8:20 pm - 10:13 pmORD-DEN
2h 53mnonstop
$155United Airlines
Find Deal
Wed, Dec 18 - Tue, Dec 24
7:00 am - 10:45 amDEN-ORD
2h 45mnonstop
8:45 pm - 10:37 pmORD-DEN
2h 52mnonstop
$161American Airlines
Find Deal
Wed, Dec 11 - Sun, Dec 15
6:28 am - 10:10 amDEN-ORD
2h 42mnonstop
9:19 pm - 11:07 pmORD-DEN
2h 48mnonstop
$212American Airlines
Find Deal
Tue, Dec 31 - Thu, Jan 2

Frontier flights from Colorado to Illinois

Our best Frontier deals on Colorado to Illinois flight tickets
Frontier
Nov 12
DEN12:28 pmDenver Intl
2h 22m
MDW3:50 pmChicago Midway
Nov 13
MDW9:45 amChicago Midway
2h 48m
DEN11:33 amDenver Intl
Frontier
Nov 9
DEN7:38 pmDenver Intl
2h 34m
ORD11:12 pmChicago O'Hare Intl
Nov 13
ORD12:21 pmChicago O'Hare Intl
2h 50m
DEN2:11 pmDenver Intl
Frontier
Nov 9
DEN7:38 pmDenver Intl
2h 34m
ORD11:12 pmChicago O'Hare Intl
Nov 13
ORD12:21 pmChicago O'Hare Intl
2h 50m
DEN2:11 pmDenver Intl

American Airlines flights from Colorado to Illinois

Our best American Airlines deals on Colorado to Illinois flight tickets
American Airlines
Dec 18
DEN7:00 amDenver Intl
2h 45m
ORD10:45 amChicago O'Hare Intl
Dec 24
ORD8:44 amChicago O'Hare Intl
2h 52m
DEN10:36 amDenver Intl
American Airlines
Dec 6
DEN5:00 amDenver Intl
6h 56m
1 stop
STL12:56 pmLambert-St Louis
Dec 8
STL5:45 amLambert-St Louis
5h 29m
1 stop
DEN10:14 amDenver Intl
American Airlines
Dec 4
DEN5:00 amDenver Intl
4h 46m
1 stop
STL10:46 amLambert-St Louis
Dec 8
STL5:45 amLambert-St Louis
5h 29m
1 stop
DEN10:14 amDenver Intl

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 airline that flies to Illinois from Colorado?

Frontier. Frontier, Allegiant Air, and Southwest are the most popular carriers operating from Colorado to Illinois

What is the cheapest Colorado to Illinois flight route?

Denver Intl - Chicago Midway. 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 3 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?

No. A direct flight is the cheapest option for a flight between Colorado to Illinois.

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

$38

Fastest flight time

1h 59m

Direct flights

Every day

Airports in Illinois

5 airports
The best one-way flight to Illinois from Colorado in the past 72 hours is $38. The best round-trip flight deal from Colorado to Illinois found on momondo in the last 72 hours is $70.
The fastest flight from Colorado to Illinois takes 1h 59m
Direct flights go from Colorado to Illinois every day.
There are 5 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Greater Peoria (PIA), 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 $37Free CancellationRating
6.1
3,583 reviews
Search Frontier flights
Allegiant AirPriceFrom $84Free CancellationRating
7.3
866 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $142Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $146Free CancellationRating
7.4
9,240 reviews
Search United Airlines flights
SouthwestPriceFrom $159Free CancellationRating
8.1
5,118 reviews
Search Southwest flights
DeltaPriceFrom $189Free CancellationRating
8.0
8,836 reviews
Search Delta 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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