Cheap Flights from Chicago, IL to Denver, CO from $72

Return flight: Denver – Chicago

On Cheapflightsplus.com you will find 22 direct and 215 connecting flights from Chicago to Denver. You can compare airfare deals from 8 airlines and multiple travel sites from $72, 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: $72 (one-way), $123 (round-trip).
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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 Arrival Flight Details Flight Duration Price
05:00 — 06:41
05:00 — 06:41 UA2666 United Airlines
Chicago — Denver
2h 41m
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from$111
06:00 — 07:41
06:00 — 07:41 F91483 Frontier Airlines
Chicago — Denver
2h 41m
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from$113
07:15 — 08:59
07:15 — 08:59 UA791 United Airlines
Chicago — Denver
2h 44m
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from$112
08:45 — 10:35
08:45 — 10:35 UA1599 United Airlines
Chicago — Denver
2h 50m
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from$112
08:49 — 10:35
08:49 — 10:35 UA250 United Airlines
Chicago — Denver
2h 46m
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from$111
08:49 — 10:35
08:49 — 10:35 UA2154 United Airlines
Chicago — Denver
2h 46m
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from$113
12:35 — 14:19
12:35 — 14:19 F92209 Frontier Airlines
Chicago — Denver
2h 44m
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from$72
12:55 — 14:37
12:55 — 14:37 UA1484 United Airlines
Chicago — Denver
2h 42m
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from$118
12:55 — 14:37
12:55 — 14:37 UA2479 United Airlines
Chicago — Denver
2h 42m
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from$119
13:04 — 14:46
13:04 — 14:46 UA622 United Airlines
Chicago — Denver
2h 42m
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from$118
13:58 — 15:39
13:58 — 15:39 UA503 United Airlines
Chicago — Denver
2h 41m
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from$118
14:16 — 16:02
14:16 — 16:02 UA767 United Airlines
Chicago — Denver
2h 46m
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from$112
14:53 — 16:35
14:53 — 16:35 UA664 United Airlines
Chicago — Denver
2h 42m
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from$118
14:53 — 16:35
14:53 — 16:35 UA2048 United Airlines
Chicago — Denver
2h 42m
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from$119
16:10 — 17:56
16:10 — 17:56 UA1801 United Airlines
Chicago — Denver
2h 46m
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from$111
16:10 — 17:56
16:10 — 17:56 UA1732 United Airlines
Chicago — Denver
2h 46m
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from$184
19:01 — 20:45
19:01 — 20:45 F91227 Frontier Airlines
Chicago — Denver
2h 44m
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from$117
20:08 — 21:59
20:08 — 21:59 UA1555 United Airlines
Chicago — Denver
2h 51m
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from$111
20:08 — 21:58
20:08 — 21:58 UA2040 United Airlines
Chicago — Denver
2h 50m
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from$112
20:10 — 22:00
20:10 — 22:00 UA2394 United Airlines
Chicago — Denver
2h 50m
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from$155
21:32 — 23:18
21:32 — 23:18 UA2296 United Airlines
Chicago — Denver
2h 46m
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from$111
21:32 — 23:22
21:32 — 23:22 UA1748 United Airlines
Chicago — Denver
2h 50m
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from$136
06:51 — 15:17
13:39 — 15:59 F91855 Frontier Airlines
Chicago — San Diego
2h 12m stop
12:05 — 15:42 F94928 Frontier Airlines
San Diego — Denver
9h 26m
including layover
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from$131
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
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from$110
10:00 — 21:59
10:00 — 12:34 AS329 Alaska Airlines
Chicago — Seattle
5h 38m stop
18:12 — 21:59 AS1163 Alaska Airlines
Seattle — Denver
12h 59m
including layover
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from$177
10:58 — 18:02
10:58 — 12:25 UA4467 United Airlines
Chicago — Lake Saint Louis
4h 15m stop
16:40 — 18:02 UA483 United Airlines
Lake Saint Louis — Denver
8h 4m
including layover
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from$181
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
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from$106
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
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from$115
15:50 — 23:47
15:50 — 18:50 HA6164 Hawaiian Airlines
Chicago — San Diego
1h 29m stop
20:19 — 23:47 HA6403 Hawaiian Airlines
San Diego — Denver
8h 57m
including layover
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from$198
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
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from$87
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
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from$107
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
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from$113
20:07 — 03:56
+1 day
18:36 — 21:00 F92145 Frontier Airlines
Chicago — Las Vegas
2h 20m stop
15:38 — 18:36 F93844 Frontier Airlines
Las Vegas — Denver
8h 49m
including layover
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from$105
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
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from$110
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
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from$113
11:07 — 17:54
+1 day
11:07 — 14:56 G42467 Allegiant Air
Chicago — Punta Gorda
21h 41m stop
12:37 — 14:25 G4857 Allegiant Air
Punta Gorda — Fletcher
2h 14m stop
16:39 — 17:54 G4227 Allegiant Air
Fletcher — Denver
31h 47m
including layover
Find flight
from$196
*Departure and arrival times - local. Updated on July 9, 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 45m.

  • The fastest flight 2h 41m
  • Average flight time 2h 45m
  • The earliest flight 05:00
  • The latest flight 22:56
  • Distance 900 ml

The cheapest months to travel to Denver are june (from 61 $), august (from 72 $), july (from 77 $).

The most expensive months are april (from 142 $), may (from 123 $), october (from 118 $).

What is the lowest airfare Chicago to Denver?

The cheapest plane ticket found by our users is $72. This airfare is for economy class on one-way F92209 flight by Frontier Airlines for August 15, 2025 which leaves Midway in Chicago at 12:35 am and arrives at Denver Denver International at 14:19.

Economy class
$72
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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 8 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by Frontier Airlines - 18 departures per week at the price of from $ 72 . And the most expensive tickets are offered by Aer Lingus airline - from $ 1759.

Direct flights

There are 22 nonstop flights on the route. The fastest direct flight is UA2666 by United Airlines takes 2h 41m and the cheapest is F92209 by Frontier Airlines for $72.

See more direct flights

Connecting Flights

There are 215 flights with layovers on the route. The fastest connecting flight is UA1139 by United Airlines takes 4h 24m and the cheapest is F92209 by Frontier Airlines for $87.

  • from $87
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  • from $181
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  • AS - Alaska Airlines
    from $170
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  • EI - Aer Lingus
    from $1759
    Find
  • SY - Sun Country Airlines
    from $130
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  • HA - Hawaiian Airlines
    from $169
    Find
  • G4 - Allegiant Air
    from $119
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  • NK - Spirit Airlines
    from $207
    Find
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 $105
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  • Midway-MDW
    from $72
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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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How to book a plane ticket yourself?

How to book an air 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.

    To find a plane ticket, please select dates.

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