Cheap Flights from Chicago, IL to Denver, CO from $45

One way Round trip

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On Cheapflightsplus.com you will find 25 direct and 348 connecting flights from Chicago to Denver. You can compare airfare deals from 9 airlines and multiple travel sites from $45, book and save on cheap plane tickets and last minute offers. Also check out CHI-DEN flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Chicago to Denver Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $45 (one-way), $77 (round-trip).

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Best Flights from Chicago to Denver Today

Take a look at the list of non stop flights and flights with layovers from Chicago to Denver with the lowest price of $45. The fastest direct flight takes 2h 41m and the fastest connecting – 4h 24m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $45 Find flight	06:00 Chicago O'Hare International	07:41 Denver Denver International	2h 41m	Frontier Airlines	F91483
from $53 Find flight	12:35 Chicago Midway	14:19 Denver Denver International	2h 44m	Frontier Airlines	F92209
from $61 Find flight	07:45 Chicago O'Hare International	09:38 Denver Denver International	2h 53m	Frontier Airlines	F93173
from $82 Find flight	05:00 Chicago O'Hare International	06:41 Denver Denver International	2h 41m	United Airlines	UA2666
from $86 Find flight	19:01 Chicago Midway	20:45 Denver Denver International	2h 44m	Frontier Airlines	F91227
from $99 Find flight	07:10 Chicago O'Hare International	08:58 Denver Denver International	2h 48m	United Airlines	UA1131
from $135 Find flight	16:10 Chicago O'Hare International	17:56 Denver Denver International	2h 46m	United Airlines	UA1732
from $187 Find flight	10:44 Chicago O'Hare International	12:29 Denver Denver International	2h 45m	United Airlines	UA1803
from $64 Find flight	16:45 Chicago Midway	23:02 Denver Denver International	7h 17m layover 2h 13m - Dallas	Frontier Airlines	F92999 F94463
from $69 Find flight	11:32 Chicago O'Hare International	19:16 Denver Denver International	8h 44m layover 2h 42m - Raleigh	Frontier Airlines	F93352 F92225
from $74 Find flight	20:27 Chicago O'Hare International	08:28+1 день Denver Denver International	13h 1m layover 6h 22m - Philadelphia	Frontier Airlines	F92112 F93339
from $76 Find flight	20:52 Chicago Midway	08:29+1 день Denver Denver International	12h 37m layover 6h 19m - Philadelphia	Frontier Airlines	F94368 F93339
from $78 Find flight	12:50 Chicago Midway	19:31 Denver Denver International	7h 41m layover 1h 40m - Baltimore	Frontier Airlines	F93088 F92705
from $78 Find flight	20:07 Chicago O'Hare International	03:56+1 день Denver Denver International	8h 49m layover 2h 20m - Las Vegas	Frontier Airlines	F92145 F93844
from $81 Find flight	07:45 Chicago O'Hare International	19:31 Denver Denver International	12h 46m layover 6h 35m - Baltimore	Frontier Airlines	F94064 F92705
from $86 Find flight	09:08 Chicago O'Hare International	18:41 Denver Denver International	10h 33m layover 3h 27m - Orlando	Frontier Airlines	F92792 F91733

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on May 31, 2025

Flight Schedule Chicago (Illinois) to Denver (Colorado)

Full flight schedule will help you in detecting at what time planes fly from Chicago to Denver. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.

Departure	Flight Details	Flight Duration	Price
05:00 — 06:41	05:00 — 06:41 UA2666 United Airlines Chicago — Denver	2h 41m	Find flight from$82
06:00 — 07:41	06:00 — 07:41 F91483 Frontier Airlines Chicago — Denver	2h 41m	Find flight from$45
07:10 — 08:58	07:10 — 08:58 UA1131 United Airlines Chicago — Denver	2h 48m	Find flight from$99
07:15 — 08:59	07:15 — 08:59 UA791 United Airlines Chicago — Denver	2h 44m	Find flight from$82
07:45 — 09:38	07:45 — 09:38 F93173 Frontier Airlines Chicago — Denver	2h 53m	Find flight from$61
08:45 — 10:35	08:45 — 10:35 UA1599 United Airlines Chicago — Denver	2h 50m	Find flight from$82
08:49 — 10:35	08:49 — 10:35 UA250 United Airlines Chicago — Denver	2h 46m	Find flight from$82
08:49 — 10:35	08:49 — 10:35 UA2154 United Airlines Chicago — Denver	2h 46m	Find flight from$83
10:44 — 12:29	10:44 — 12:29 UA1803 United Airlines Chicago — Denver	2h 45m	Find flight from$187
12:35 — 14:19	12:35 — 14:19 F92209 Frontier Airlines Chicago — Denver	2h 44m	Find flight from$53
12:55 — 14:37	12:55 — 14:37 UA1484 United Airlines Chicago — Denver	2h 42m	Find flight from$87
12:55 — 14:37	12:55 — 14:37 UA2479 United Airlines Chicago — Denver	2h 42m	Find flight from$87
13:04 — 14:46	13:04 — 14:46 UA622 United Airlines Chicago — Denver	2h 42m	Find flight from$87
13:58 — 15:39	13:58 — 15:39 UA503 United Airlines Chicago — Denver	2h 41m	Find flight from$87
14:16 — 16:02	14:16 — 16:02 UA767 United Airlines Chicago — Denver	2h 46m	Find flight from$82
14:53 — 16:35	14:53 — 16:35 UA664 United Airlines Chicago — Denver	2h 42m	Find flight from$87
14:53 — 16:35	14:53 — 16:35 UA2048 United Airlines Chicago — Denver	2h 42m	Find flight from$87
16:10 — 17:56	16:10 — 17:56 UA1801 United Airlines Chicago — Denver	2h 46m	Find flight from$82
16:10 — 17:56	16:10 — 17:56 UA1732 United Airlines Chicago — Denver	2h 46m	Find flight from$135
19:01 — 20:45	19:01 — 20:45 F91227 Frontier Airlines Chicago — Denver	2h 44m	Find flight from$86
20:08 — 21:58	20:08 — 21:58 UA2040 United Airlines Chicago — Denver	2h 50m	Find flight from$82
20:08 — 21:59	20:08 — 21:59 UA1555 United Airlines Chicago — Denver	2h 51m	Find flight from$82
20:10 — 22:00	20:10 — 22:00 UA2394 United Airlines Chicago — Denver	2h 50m	Find flight from$87
21:32 — 23:18	21:32 — 23:18 UA2296 United Airlines Chicago — Denver	2h 46m	Find flight from$82
21:32 — 23:22	21:32 — 23:22 UA1748 United Airlines Chicago — Denver	2h 50m	Find flight from$87
06:10 — 16:01	06:10 — 07:50 SY1630 Sun Country Airlines Chicago — Minneapolis 7h 4m stop 14:54 — 16:01 SY655 Sun Country Airlines Minneapolis — Denver	10h 51m including layover	Find flight from$96
07:45 — 19:31	07:45 — 10:51 F94064 Frontier Airlines Chicago — Baltimore 6h 35m stop 17:26 — 19:31 F92705 Frontier Airlines Baltimore — Denver	12h 46m including layover	Find flight from$81
09:08 — 18:41	09:17 — 13:11 F92792 Frontier Airlines Chicago — Orlando 3h 27m stop 06:00 — 08:18 F91733 Frontier Airlines Orlando — Denver	10h 33m including layover	Find flight from$86
09:58 — 23:19	09:17 — 13:11 F92792 Frontier Airlines Chicago — Orlando 7h 17m stop 20:50 — 23:22 F93311 Frontier Airlines Orlando — Denver	14h 21m including layover	Find flight from$99
11:32 — 19:16	11:32 — 14:37 F93352 Frontier Airlines Chicago — Raleigh 2h 42m stop 17:17 — 19:21 F92225 Frontier Airlines Raleigh — Denver	8h 44m including layover	Find flight from$69
12:50 — 19:31	06:15 — 09:05 F93088 Frontier Airlines Chicago — Baltimore 1h 40m stop 17:58 — 20:18 F92705 Frontier Airlines Baltimore — Denver	7h 41m including layover	Find flight from$78
14:20 — 23:43	11:47 — 14:37 F93243 Frontier Airlines Chicago — Dallas 5h 17m stop 20:06 — 21:32 F94069 Frontier Airlines Dallas — Denver	10h 23m including layover	Find flight from$85
15:25 — 21:21	11:00 — 14:03 F92144 Frontier Airlines Chicago — Atlanta 1h 23m stop 21:28 — 23:06 F91449 Frontier Airlines Atlanta — Denver	6h 56m including layover	Find flight from$87
15:48 — 23:59	13:02 — 16:48 F91416 Frontier Airlines Chicago — Tampa 2h 28m stop 22:33 — 00:49 F92745 Frontier Airlines Tampa — Denver	9h 11m including layover	Find flight from$94
16:45 — 23:02	16:02 — 18:55 F92999 Frontier Airlines Chicago — Dallas 2h 13m stop 22:15 — 23:29 F94463 Frontier Airlines Dallas — Denver	7h 17m including layover	Find flight from$64
17:08 — 07:59 +1 day	16:30 — 20:30 F93044 Frontier Airlines Chicago — Orlando 8h 51m stop 06:00 — 08:21 F91733 Frontier Airlines Orlando — Denver	15h 51m including layover	Find flight from$89
17:08 — 23:19 +1 day	17:03 — 21:00 F93044 Frontier Airlines Chicago — Orlando 23h 50m stop 20:59 — 23:31 F93311 Frontier Airlines Orlando — Denver	31h 11m including layover	Find flight from$89
18:50 — 23:43	18:50 — 21:25 F92999 Frontier Airlines Chicago — Dallas 1h stop 22:25 — 23:43 F94069 Frontier Airlines Dallas — Denver	5h 53m including layover	Find flight from$78
18:50 — 06:26 +1 day	18:50 — 21:25 F92999 Frontier Airlines Chicago — Dallas 7h 45m stop 05:10 — 06:26 F92147 Frontier Airlines Dallas — Denver	12h 36m including layover	Find flight from$83
20:27 — 08:28 +1 day	19:04 — 22:30 F92112 Frontier Airlines Chicago — Philadelphia 6h 22m stop 06:15 — 08:29 F93339 Frontier Airlines Philadelphia — Denver	13h 1m including layover	Find flight from$74
20:52 — 08:29 +1 day	20:55 — 23:59 F94368 Frontier Airlines Chicago — Philadelphia 6h 19m stop 06:15 — 08:37 F93339 Frontier Airlines Philadelphia — Denver	12h 37m including layover	Find flight from$76
22:56 — 09:32 +1 day	22:56 — 00:47 F91735 Frontier Airlines Chicago — Phoenix 5h 46m stop 06:33 — 09:32 F91376 Frontier Airlines Phoenix — Denver	11h 36m including layover	Find flight from$83
11:50 — 18:14 +1 day	11:50 — 13:50 NK2620 Spirit Airlines Chicago — Las Vegas 3h 28m stop 17:18 — 18:49 NK2382 Spirit Airlines Las Vegas — Stockton 20h 1m stop 14:50 — 18:14 G41635 Allegiant Air Stockton — Denver	31h 24m including layover	Find flight from$120

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on May 31, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Chicago to Denver depends on and how to choose the most interesting flight option for you.

Distance between Chicago and Denver is 1448 miles. Time difference between the cities is 1h. Airplanes depart 05:00 to 22:56 from 7 Chicago airports and arrive 05:00 to 22:56 to 2 Denver airports. Average flight time is 2h 46m.

The fastest flight 2h 41m
Average flight time 2h 46m
The earliest flight 05:00
The latest flight 22:56
Distance 900 ml

The cheapest months to travel to Denver are june (from 60 $), august (from 71 $), july (from 76 $).

The most expensive months are april (from 140 $), october (from 116 $), september (from 110 $).

What is the lowest airfare Chicago to Denver?

The cheapest plane ticket found by our users is $45. This airfare is for economy class on one-way F91483 flight by Frontier Airlines for June 28, 2025 which leaves O'Hare International in Chicago at 06:00 am and arrives at Denver Denver International at 07:41.

Economy class

$45

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Business class

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First class

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Popular Airlines on the Route

The flight Chicago — Denver is served by 9 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 34 departures per week at the price of from $ 45 . And the most expensive tickets are offered by Finnair airline - from $ 3122.

Direct flights

There are 25 nonstop flights on the route. The fastest direct flight is F91483 by Frontier Airlines takes 2h 41m and the cheapest is F91483 by Frontier Airlines for $45.

F9 - Frontier Airlines

from $45

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UA - United Airlines

from $82

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Connecting Flights

There are 348 flights with layovers on the route. The fastest connecting flight is UA1139 by United Airlines takes 4h 24m and the cheapest is F91483 by Frontier Airlines for $64.

F9 - Frontier Airlines

from $64

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UA - United Airlines

from $133

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AS - Alaska Airlines

from $125

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EI - Aer Lingus

from $1299

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SY - Sun Country Airlines

from $96

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AY - Finnair

from $3122

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HA - Hawaiian Airlines

from $124

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G4 - Allegiant Air

from $88

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NK - Spirit Airlines

from $120

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See more connecting flights

Airports

You can fly from Chicago to Denver from 7 airports (O'Hare International, Midway, Dupage County, Chicago FSS, Merrill C Meigs (closed), Pal-Waukee, Chicago NAS).

Chicago airports

O'Hare International-ORD

from $45
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Midway-MDW

from $53
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Dupage County-DPA

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Chicago FSS-CHI

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Merrill C Meigs (closed)-CGX

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Pal-Waukee-PWK

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Chicago NAS-NOH

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Denver airports

Denver International-DEN

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Arapahoe Co-APA

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Airplanes

There are flights to Denver from Chicago by 9 airlines that use 3 aircraft brands. They range from huge modern airplanes to small-sized.

Boeing 737-900

from $277

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Airbus A320

from $390

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Airbus A319

from $457

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Top Domestic Destinations from Chicago

You may also consider searching for discounted plane tickets to some other popular places from Chicago within United States.

Chicago — Las Vegas

from $508

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Chicago — New York

from $74

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Chicago — Atlanta

from $76

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Chicago — Orlando

from $62

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Chicago — Miami

from $66

Find
Chicago — Dallas

from $70

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Chicago — Houston

from $66

Find
Chicago — Boston

from $61

Find
Chicago — Phoenix

from $65

Find
Chicago — Denver

from $61

Find

Top International Destinations from Chicago

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Chicago — London

from $60

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Chicago — Cancun

from $72

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Chicago — Toronto

from $73

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Chicago — Paris

from $61

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Chicago — Rome

from $79

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Chicago — Hyderabad

from $73

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Chicago — Mexico City

from $76

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Chicago — Tokyo

from $60

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Chicago — Dublin

from $59

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Chicago — Mumbai

from $74

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How to book a plane ticket yourself?

Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
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