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DEN

$32 Find cheap flights from Illinois to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Denver departing on 7/9. 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.
1 adult
0 bags
Mon 7/1
Mon 7/8

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In the last 7 days travelers have searched 42,787,818 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

July

Cheapest flight

$32
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Chicago Midway Airport to Denver

FAQs for booking flights from Illinois to Denver

  • How does KAYAK find such low prices on flights from Illinois to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Illinois to Denver?

Find which airlines fly direct from Illinois to Denver Intl, which days they fly and book direct flights.

Nonstop departures

Illinois to Denver Intl

Monday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Tuesday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Wednesday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Thursday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Friday

ANA, Aer Lingus, Aeromexico, +59 more

ANA, Aer Lingus, +60 more

Saturday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Sunday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

See more direct flights

Nonstop returns

Denver Intl to Illinois

Monday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Tuesday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Wednesday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Thursday

ANA, Aer Lingus, Aeromexico, +58 more

ANA, Aer Lingus, +59 more

Friday

ANA, Aer Lingus, Aeromexico, +59 more

ANA, Aer Lingus, +60 more

Saturday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Sunday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

See more direct flights
See more direct flights

Book cheap flights from Illinois to Denver

Recent round-trip flight deals

6/11Tue
nonstopFrontier
2h 29mSTL-DEN
6/15Sat
nonstopFrontier
2h 09mDEN-STL
$56
8/31Sat
nonstopFrontier
2h 39mORD-DEN
9/4Wed
nonstopFrontier
2h 36mDEN-ORD
$57
6/25Tue
nonstop
2h 45mORD-DEN
6/27Thu
1 stop
8h 41mDEN-ORD
$102
6/19Wed
nonstop
2h 57mORD-DEN
6/27Thu
1 stop
8h 41mDEN-ORD
$112
8/26Mon
nonstopAllegiant Air
2h 18mPIA-DEN
8/30Fri
nonstopAllegiant Air
2h 03mDEN-PIA
$116
8/16Fri
nonstopAllegiant Air
2h 18mPIA-DEN
8/23Fri
nonstopAllegiant Air
2h 03mDEN-PIA
$120
6/14Fri
1 stopAmerican Airlines
7h 12mMLI-DEN
6/17Mon
1 stopAmerican Airlines
6h 49mDEN-MLI
$145
6/22Sat
1 stopAmerican Airlines
7h 03mMLI-DEN
6/27Thu
1 stopAmerican Airlines
5h 51mDEN-MLI
$147
8/7Wed
1 stopDelta
5h 24mSTL-DEN
8/13Tue
1 stopDelta
6h 39mDEN-STL
$176
9/17Tue
1 stopDelta
8h 59mORD-DEN
9/19Thu
1 stopDelta
5h 31mDEN-ORD
$196

Search by stops

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Recent one-way flight deals

7/9Tue
nonstopFrontier
2h 45mMDW-DEN
$32
8/28Wed
nonstopFrontier
2h 43mMDW-DEN
$37
6/28Fri
1 stopSun Country Air
14h 34mORD-DEN
$60
6/26Wed
1 stopSun Country Air
13h 26mORD-DEN
$66
7/5Fri
nonstopUnited Airlines
2h 43mORD-DEN
$69
7/3Wed
1 stopAmerican Airlines
7h 12mMLI-DEN
$73
8/30Fri
nonstopUnited Airlines
2h 44mORD-DEN
$80
7/3Wed
1 stopDelta
8h 41mSTL-DEN
$88
7/5Fri
nonstopAmerican Airlines
2h 37mORD-DEN
$93
9/21Sat
1 stopDelta
8h 59mORD-DEN
$98

Search by stops

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Search by price

Last minute flights from Illinois to Denver

Last minute flight, train and bus deals

6/3Mon
nonstopFrontier
2h 31mSTL-DEN
6/6Thu
nonstopFrontier
2h 08mDEN-STL
$96
6/3Mon
nonstopFrontier
2h 51mORD-DEN
6/6Thu
nonstopFrontier
2h 30mDEN-ORD
$100
6/4Tue
nonstopFrontier
2h 36mSTL-DEN
6/11Tue
nonstopFrontier
2h 08mDEN-STL
$116
6/5Wed
multi-stopAmerican Airlines
7h 12mMLI-DEN
6/8Sat
multi-stopAmerican Airlines
6h 49mDEN-MLI
$145
6/3Mon
nonstopAllegiant Air
2h 27mPIA-DEN
6/14Fri
nonstopAllegiant Air
2h 04mDEN-PIA
$185
6/3Mon
nonstopAllegiant Air
2h 27mPIA-DEN
6/14Fri
nonstopAllegiant Air
2h 04mDEN-PIA
$204
6/3Mon
multi-stopSun Country Air
22h 46mORD-DEN
6/9Sun
multi-stopSun Country Air
8h 19mDEN-ORD
$375
6/4Tue
nonstopUnited Airlines
2h 38mORD-DEN
6/8Sat
nonstopUnited Airlines
2h 35mDEN-ORD
$377
6/1Sat
nonstopUnited Airlines
2h 45mORD-DEN
6/8Sat
multi-stopUnited Airlines
5h 53mDEN-ORD
$407
6/3Mon
multi-stopAmerican Airlines
5h 39mPIA-DEN
6/14Fri
multi-stopAmerican Airlines
7h 06mDEN-PIA
$428

Search by stops

Search by airline

Search by price