What is the cheapest airline that flies from Denver Intl to Illinois?

Delta, Southwest, and United Airlines are the most popular carriers operating from Denver Intl to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Illinois from Denver according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between Denver and Illinois is 44 per day as of October 2026. The most frequent departure time is 9:00AM, with 44% of daily flights leaving at noon.

How many flights depart from Denver to Illinois on average per week?

As of October 2026, 309 flights take off from Denver and land in Illinois each week. The most common flight departure day for this route is Wed, with 29% of weekly flights taking off on this day.

When did momondo last update prices for flights from Denver Intl Airport to Illinois?

Prices for flights from Denver Intl Airport to Illinois are updated daily.

How many operators does momondo search for flights from Denver Intl Airport to Illinois?

The number of operators available for flights from Denver Intl Airport to Illinois is 6 as of October 2026.

How old do you have to be to fly from Denver Intl Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport to Illinois.

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

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$95 Cheap Flights from Denver to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:41 am - 7:42 pmDEN Denver Intl-MDW Chicago Midway

12h 01m1 stop Orlando

8:37 pm - 9:30 pmMDW Chicago Midway-DEN Denver Intl

25h 53m1 stop Orlando

$192Frontier

Thu, Dec 10 - Sun, Dec 13

11:00 am - 5:35 pmDEN Denver Intl-MDW Chicago Midway

5h 35m1 stop Wichita Eisenhower National

10:30 am - 2:30 pmMDW Chicago Midway-DEN Denver Intl

5h 00m1 stop Tulsa

$193Southwest

Sun, Nov 22 - Thu, Nov 26

5:30 pm - 12:05 amDEN Denver Intl-MDW Chicago Midway

5h 35m1 stop Nashville Intl

7:35 am - 10:40 amMDW Chicago Midway-DEN Denver Intl

4h 05m1 stop Kansas City

$193Southwest

Fri, Feb 19 - Sun, Feb 21

9:26 pm - 12:53 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 27mnonstop

6:40 am - 8:36 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$195Frontier

Sat, Nov 21 - Wed, Nov 25

1:27 pm - 7:39 pmDEN Denver Intl-ORD Chicago O'Hare Intl

5h 12m1 stop Minneapolis St Paul

5:42 pm - 11:34 pmORD Chicago O'Hare Intl-DEN Denver Intl

6h 52m1 stop Minneapolis St Paul

$197Delta

Fri, Nov 13 - Mon, Nov 16

1:27 pm - 7:39 pmDEN Denver Intl-ORD Chicago O'Hare Intl

5h 12m1 stop Minneapolis St Paul

6:23 am - 9:58 amORD Chicago O'Hare Intl-DEN Denver Intl

4h 35m1 stop Minneapolis St Paul

$197Delta

Fri, Nov 13 - Wed, Nov 18

2:35 pm - 6:14 pmDEN Denver Intl-ORD Chicago O'Hare Intl

2h 39mnonstop

9:45 am - 11:41 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$199American Airlines

Wed, Dec 2 - Sat, Dec 5

2:11 pm - 5:50 pmDEN Denver Intl-ORD Chicago O'Hare Intl

2h 39mnonstop

4:53 pm - 11:48 pmORD Chicago O'Hare Intl-DEN Denver Intl

7h 55m1 stop Dallas/Fort Worth

$219American Airlines

Fri, Nov 13 - Mon, Nov 16

6:00 am - 9:40 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 40mnonstop

7:57 pm - 9:48 pmORD Chicago O'Hare Intl-DEN Denver Intl

2h 51mnonstop

$245United Airlines

Fri, Nov 20 - Sun, Nov 22

5:50 am - 9:33 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 43mnonstop

10:00 pm - 11:53 pmORD Chicago O'Hare Intl-DEN Denver Intl

2h 53mnonstop

$250United Airlines

Sun, Dec 27 - Thu, Dec 31

Cheap last minute flights

Enter your travel dates to find the best prices.

8:55 pm - 12:21 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 26mnonstop

6:30 am - 8:26 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$201Frontier

Wed, Oct 28 - Wed, Nov 4

8:55 pm - 12:21 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 26mnonstop

6:30 am - 8:26 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$203Frontier

Wed, Oct 28 - Fri, Nov 6

10:20 am - 1:19 pmDEN Denver Intl-PIA Greater Peoria

1h 59mnonstop

5:24 pm - 6:44 pmPIA Greater Peoria-DEN Denver Intl

2h 20mnonstop

$254Allegiant Air

Sun, Oct 25 - Sun, Nov 1

10:40 am - 7:08 pmDEN Denver Intl-ORD Chicago O'Hare Intl

7h 28m1 stop Dallas/Fort Worth

6:30 pm - 8:19 amORD Chicago O'Hare Intl-DEN Denver Intl

14h 49m1 stop Minneapolis St Paul

$319Multiple Airlines

Wed, Oct 28 - Fri, Nov 6

8:35 am - 11:55 amDEN Denver Intl-MDW Chicago Midway

2h 20mnonstop

6:05 am - 8:00 amMDW Chicago Midway-DEN Denver Intl

2h 55mnonstop

$351Southwest

Tue, Oct 27 - Mon, Dec 14

10:45 am - 2:05 pmDEN Denver Intl-MDW Chicago Midway

2h 20mnonstop

1:20 pm - 5:25 pmMDW Chicago Midway-DEN Denver Intl

5h 05m1 stop Detroit Metropolitan Wayne County

$357Southwest

Tue, Oct 27 - Mon, Dec 14

8:26 am - 12:36 pmDEN Denver Intl-MDW Chicago Midway

27h 10m1 stop Knoxville McGhee Tyson

6:42 pm - 9:32 pmMDW Chicago Midway-DEN Denver Intl

27h 50m1 stop Atlanta Hartsfield-Jackson

$378Multiple Airlines

Sun, Oct 25 - Mon, Nov 16

9:35 am - 1:15 pmDEN Denver Intl-ORD Chicago O'Hare Intl

2h 40mnonstop

7:57 pm - 9:48 pmORD Chicago O'Hare Intl-DEN Denver Intl

2h 51mnonstop

$399United Airlines

Sun, Oct 25 - Mon, Nov 16

5:45 pm - 9:06 pmDEN Denver Intl-PIA Greater Peoria

2h 21mnonstop

8:15 am - 12:45 pmPIA Greater Peoria-DEN Denver Intl

5h 30m1 stop Chicago O'Hare Intl

$424United Airlines

Sun, Oct 25 - Sun, Nov 1

12:21 pm - 11:59 pmDEN Denver Intl-BMI Bloomington-Normal

10h 38m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

5:00 am - 11:37 amBMI Bloomington-Normal-DEN Denver Intl

7h 37m1 stop Chicago O'Hare Intl

$454American Airlines

Sat, Oct 24 - Tue, Oct 27

Cheap direct flights

Enter your travel dates to find the best prices.

9:26 pm - 12:53 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 27mnonstop

6:40 am - 8:36 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$195Frontier

Sat, Nov 21 - Wed, Nov 25

8:40 pm - 11:55 pmDEN Denver Intl-MDW Chicago Midway

2h 15mnonstop

5:30 am - 7:15 amMDW Chicago Midway-DEN Denver Intl

2h 45mnonstop

$195Southwest

Mon, Nov 23 - Thu, Nov 26

8:55 pm - 12:15 amDEN Denver Intl-MDW Chicago Midway

2h 20mnonstop

10:50 pm - 12:40 amMDW Chicago Midway-DEN Denver Intl

2h 50mnonstop

$196Southwest

Wed, Nov 25 - Mon, Nov 30

6:20 am - 9:45 amDEN Denver Intl-MDW Chicago Midway

2h 25mnonstop

6:00 am - 7:45 amMDW Chicago Midway-DEN Denver Intl

2h 45mnonstop

$196Southwest

Fri, Feb 19 - Sun, Feb 21

8:59 pm - 12:26 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 27mnonstop

7:00 am - 9:04 amORD Chicago O'Hare Intl-DEN Denver Intl

3h 04mnonstop

$197Frontier

Sun, Dec 20 - Thu, Dec 31

8:55 pm - 12:21 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 26mnonstop

6:40 am - 8:36 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$197Frontier

Tue, Nov 17 - Mon, Nov 23

2:35 pm - 6:14 pmDEN Denver Intl-ORD Chicago O'Hare Intl

2h 39mnonstop

9:45 am - 11:41 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 56mnonstop

$199American Airlines

Wed, Dec 2 - Sat, Dec 5

6:18 pm - 9:55 pmDEN Denver Intl-ORD Chicago O'Hare Intl

2h 37mnonstop

10:35 pm - 12:32 amORD Chicago O'Hare Intl-DEN Denver Intl

2h 57mnonstop

$240American Airlines

Thu, Dec 17 - Wed, Dec 23

6:00 am - 9:40 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 40mnonstop

7:57 pm - 9:48 pmORD Chicago O'Hare Intl-DEN Denver Intl

2h 51mnonstop

$245United Airlines

Fri, Nov 20 - Sun, Nov 22

5:50 am - 9:33 amDEN Denver Intl-ORD Chicago O'Hare Intl

2h 43mnonstop

10:00 pm - 11:53 pmORD Chicago O'Hare Intl-DEN Denver Intl

2h 53mnonstop

$250United Airlines

Sun, Dec 27 - Thu, Dec 31

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Frontier flights from Denver to Illinois

Our best Frontier deals on Denver to Illinois flight tickets

Frontier

Nov 10

DEN7:10 pmDenver Intl

20h 57m

1 stop

ORD5:07 pmChicago O'Hare Intl

Nov 14

ORD10:29 amChicago O'Hare Intl

12h 05m

1 stop

DEN9:34 pmDenver Intl

$191

Frontier

Nov 12

DEN7:10 pmDenver Intl

12h 36m

1 stop

ORD8:46 amChicago O'Hare Intl

Nov 15

ORD7:50 pmChicago O'Hare Intl

13h 32m

1 stop

DEN8:22 amDenver Intl

$192

Frontier

Nov 6

DEN7:30 amDenver Intl

20h 43m

1 stop

ORD5:13 amChicago O'Hare Intl

Nov 11

ORD6:30 amChicago O'Hare Intl

2h 56m

DEN8:26 amDenver Intl

$195

Southwest flights from Denver to Illinois

Our best Southwest deals on Denver to Illinois flight tickets

Southwest

Nov 25

DEN8:55 pmDenver Intl

2h 20m

MDW12:15 amChicago Midway

Nov 30

MDW10:50 pmChicago Midway

2h 50m

DEN12:40 amDenver Intl

$196

Southwest

Nov 30

DEN5:05 amDenver Intl

2h 15m

MDW8:20 amChicago Midway

Dec 6

MDW5:55 amChicago Midway

2h 50m

DEN7:45 amDenver Intl

$204

Southwest

Dec 5

DEN6:00 amDenver Intl

7h 30m

2 stops

MDW2:30 pmChicago Midway

Dec 7

MDW6:05 amChicago Midway

2h 55m

DEN8:00 amDenver Intl

$205

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverChicago

DEN Denver Intl - MDW Chicago Midway

DENMDW

Denver Intl

Thu 12/10

6:41 am-7:42 pm

1 stop12h 01m

Chicago Midway

Sun 12/13

8:37 pm-9:30 pm

1 stop25h 53m

$192

DenverChicago

DEN Denver Intl - MDW Chicago Midway

DENMDW

Denver Intl

Sun 11/22

11:00 am-5:35 pm

1 stop5h 35m

Chicago Midway

Thu 11/26

10:30 am-2:30 pm

1 stop5h 00m

$193

DenverChicago

DEN Denver Intl - MDW Chicago Midway

DENMDW

Denver Intl

Fri 2/19

5:30 pm-12:05 am

1 stop5h 35m

Chicago Midway

Sun 2/21

7:35 am-10:40 am

1 stop4h 05m

$193

Quickest round-trip

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Sat 11/21

9:26 pm-12:53 am

Nonstop2h 27m

Chicago O'Hare Intl

Wed 11/25

6:40 am-8:36 am

Nonstop2h 56m

$195

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Fri 11/13

1:27 pm-7:39 pm

1 stop5h 12m

Chicago O'Hare Intl

Mon 11/16

5:42 pm-11:34 pm

1 stop6h 52m

$197

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Fri 11/13

1:27 pm-7:39 pm

1 stop5h 12m

Chicago O'Hare Intl

Wed 11/18

6:23 am-9:58 am

1 stop4h 35m

$197

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Wed 12/2

2:35 pm-6:14 pm

Nonstop2h 39m

Chicago O'Hare Intl

Sat 12/5

9:45 am-11:41 am

Nonstop2h 56m

$199

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Fri 11/13

2:11 pm-5:50 pm

Nonstop2h 39m

Chicago O'Hare Intl

Mon 11/16

4:53 pm-11:48 pm

1 stop7h 55m

$219

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Fri 11/20

6:00 am-9:40 am

Nonstop2h 40m

Chicago O'Hare Intl

Sun 11/22

7:57 pm-9:48 pm

Nonstop2h 51m

$245

DenverChicago

DEN Denver Intl - ORD Chicago O'Hare Intl

DENORD

Denver Intl

Sun 12/27

5:50 am-9:33 am

Nonstop2h 43m

Chicago O'Hare Intl

Thu 12/31

10:00 pm-11:53 pm

Nonstop2h 53m

$250

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Denver 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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Denver is in January. Flight prices, which tend to average around $238, 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 January, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $264.

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

The cheapest day to depart from Denver to Illinois is on a Friday when prices can be found for as low as $343. Flights from Denver to Illinois on a Sunday will generally be more expensive and average around $567. 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 Denver to Illinois during this time can be as low as $272. Flights at noon are often more expensive with an average ticket price of $564.

What is the cheapest Denver Intl to Illinois flight route?

Fly from Denver Intl to Greater Peoria for the best Denver Intl - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $308 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Denver for as low as $250 on momondo.

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

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

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

Cheap Denver to Illinois flight deals and tips

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

Best Price Found	$95
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Denver in the past 72 hours is $95. The best round-trip flight deal from Denver to Illinois found on momondo in the last 72 hours is $192.

The fastest flight from Denver to Illinois takes 1h 55m

Direct flights go from Denver to Illinois every day.

There are 98 airports in Illinois. From Denver there are direct flights to Chicago Midway (MDW), Greater Peoria (PIA), Moline Quad-City (MLI).

Search flight deals

Frequently asked questions about flying from Denver to Illinois

When did momondo last update prices for flights from Denver Intl Airport to Illinois?
Prices for flights from Denver Intl Airport to Illinois are updated daily.
How many operators does momondo search for flights from Denver Intl Airport to Illinois?
The number of operators available for flights from Denver Intl Airport to Illinois is 6 as of October 2026.
How old do you have to be to fly from Denver Intl Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Denver to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Denver to Illinois is Airbus A321neo, representing 18.01% of all bookings. The subsequent popular models are Airbus A321-100/200 at 13.32%, Boeing 737-800 at 10.70%, and Airbus A319 at 7.83%.

Best airlines flying from Denver to Illinois

Compare and see reviews for airlines that fly from Denver to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $81	Free Cancellation	Rating 5.5 2,519 reviews	Search Frontier flights
Allegiant Air	PriceFrom $100	Free Cancellation	Rating 7.3 677 reviews	Search Allegiant Air flights
JetBlue	PriceFrom $138	Free Cancellation	Rating 7.1 3,059 reviews	Search JetBlue flights
Southwest	PriceFrom $170	Free Cancellation	Rating 7.9 4,210 reviews	Search Southwest flights
American Airlines	PriceFrom $176	Free Cancellation	Rating 7.0 12,186 reviews	Search American Airlines flights
United Airlines	PriceFrom $190	Free Cancellation	Rating 7.3 10,404 reviews	Search United Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Illinois for you.

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

momondo does allow users to show only those flights to Illinois from Denver which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Denver to Illinois?

Once all potential Denver to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Denver 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.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 11/21

Sat 11/28

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities

Other flights from Denver

Other flights to Illinois

Airlines

Complete your trip

Feeling lucky

Popular cities in Illinois

Flights to New Yorkfrom $65

Flights to Los Angelesfrom $39

Flights to Orlandofrom $39

Flights to Miamifrom $43

Flights to San Franciscofrom $42

Flights to Chicagofrom $60

Flights to Las Vegasfrom $36

Flights to Washington, D.C.from $35

Flights to Fort Lauderdalefrom $22

Flights to Bostonfrom $107

Flights to Atlantafrom $38

Flights to Dallasfrom $50

Cheap flights from Denver to Illinois from $95

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Illinois departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Denver to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Frontier flights from Denver to Illinois

Our best Frontier deals on Denver to Illinois flight tickets

Southwest flights from Denver to Illinois

Our best Southwest deals on Denver to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Denver to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Denver to Illinois

What is the cheapest month to fly to Illinois?

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

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

What is the cheapest Denver Intl to Illinois flight route?

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

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

Can stopping save me money on Denver to Illinois flights?

What is the cheapest airline that flies from Denver Intl to Illinois?

What airlines fly to Illinois?

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

How many flights depart from Denver to Illinois on average per week?

Cheap Denver to Illinois flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Denver to Illinois

Best airlines flying from Denver to Illinois

Compare and see reviews for airlines that fly from Denver to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo

Denver flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Illinois

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Illinois

Explore popular destinations other users love

According to popular flight searches on momondo this year