Frontier Airlines Chicago to Denver Flights

Return flight: Denver – Chicago

Cheapflightsplus.com will find cheap Frontier Airlines flights from Chicago to Denver. Compare airline ticket prices and book air tickets starting from $45 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of Frontier Airlines, arrivals and departure details below.

Find Cheap Airfare Chicago (IL) — Denver (CO) by Frontier Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in june: one-way - $45, two-way – $77.
Direct flights
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Below is a detailed 2025 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
12:35 pm — 2:19 pm
12:35 pm — 2:19 pm F92209 Frontier Airlines
Chicago — Denver
2h 44m
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from$53
6:00 am — 7:41 am
6:00 am — 7:41 am F91483 Frontier Airlines
Chicago — Denver
2h 41m
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from$45
7:01 pm — 8:45 pm
7:01 pm — 8:45 pm F91227 Frontier Airlines
Chicago — Denver
2h 44m
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from$86
7:45 am — 9:38 am
7:45 am — 9:38 am F93173 Frontier Airlines
Chicago — Denver
2h 53m
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from$61
10:56 pm — 9:32 am
+1 day
10:56 pm — 0:47 am F91735 Frontier Airlines
Chicago — Phoenix
5h 46m stop
6:33 am — 9:32 am F91376 Frontier Airlines
Phoenix — Denver
11h 36m
including layover
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from$83
11:32 am — 7:16 pm
11:32 am — 2:37 pm F93352 Frontier Airlines
Chicago — Raleigh
2h 42m stop
5:17 pm — 7:21 pm F92225 Frontier Airlines
Raleigh — Denver
8h 44m
including layover
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from$69
12:50 pm — 7:31 pm
6:15 am — 9:05 am F93088 Frontier Airlines
Chicago — Baltimore
1h 40m stop
5:58 pm — 8:18 pm F92705 Frontier Airlines
Baltimore — Denver
7h 41m
including layover
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from$78
1:56 pm — 0:21 am
+1 day
1:56 pm — 4:08 pm F91855 Frontier Airlines
Chicago — San Diego
4h 29m stop
8:37 pm — 0:21 am F94990 Frontier Airlines
San Diego — Denver
11h 25m
including layover
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from$99
1:56 pm — 10:00 am
+1 day
1:56 pm — 4:08 pm F91855 Frontier Airlines
Chicago — San Diego
14h 17m stop
6:25 am — 10:00 am F92818 Frontier Airlines
San Diego — Denver
21h 4m
including layover
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from$105
2:20 pm — 11:43 pm
11:47 am — 2:37 pm F93243 Frontier Airlines
Chicago — Dallas
5h 17m stop
8:06 pm — 9:32 pm F94069 Frontier Airlines
Dallas — Denver
10h 23m
including layover
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from$85
2:58 pm — 7:42 am
+1 day
12:30 pm — 3:29 pm F93135 Frontier Airlines
Chicago — Houston
11h 57m stop
6:00 am — 7:39 am F93229 Frontier Airlines
Houston — Denver
17h 44m
including layover
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from$93
3:25 pm — 9:21 pm
11:00 am — 2:03 pm F92144 Frontier Airlines
Chicago — Atlanta
1h 23m stop
9:28 pm — 11:06 pm F91449 Frontier Airlines
Atlanta — Denver
6h 56m
including layover
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from$87
3:48 pm — 11:59 pm
1:02 pm — 4:48 pm F91416 Frontier Airlines
Chicago — Tampa
2h 28m stop
10:33 pm — 0:49 am F92745 Frontier Airlines
Tampa — Denver
9h 11m
including layover
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from$94
4:06 pm — 11:59 pm
4:00 pm — 7:40 pm F91186 Frontier Airlines
Chicago — Tampa
2h 14m stop
9:39 pm — 11:56 pm F92745 Frontier Airlines
Tampa — Denver
8h 53m
including layover
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from$102
4:45 pm — 11:02 pm
4:02 pm — 6:55 pm F92999 Frontier Airlines
Chicago — Dallas
2h 13m stop
10:15 pm — 11:29 pm F94463 Frontier Airlines
Dallas — Denver
7h 17m
including layover
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from$64
5:08 pm — 7:59 am
+1 day
4:30 pm — 8:30 pm F93044 Frontier Airlines
Chicago — Orlando
8h 51m stop
6:00 am — 8:21 am F91733 Frontier Airlines
Orlando — Denver
15h 51m
including layover
Find flight
from$89
5:08 pm — 11:19 pm
+1 day
5:03 pm — 9:00 pm F93044 Frontier Airlines
Chicago — Orlando
23h 50m stop
8:59 pm — 11:31 pm F93311 Frontier Airlines
Orlando — Denver
31h 11m
including layover
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from$89
6:50 pm — 11:43 pm
6:50 pm — 9:25 pm F92999 Frontier Airlines
Chicago — Dallas
1h stop
10:25 pm — 11:43 pm F94069 Frontier Airlines
Dallas — Denver
5h 53m
including layover
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from$78
7:45 am — 7:31 pm
7:45 am — 10:51 am F94064 Frontier Airlines
Chicago — Baltimore
6h 35m stop
5:26 pm — 7:31 pm F92705 Frontier Airlines
Baltimore — Denver
12h 46m
including layover
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from$81
8:27 pm — 8:28 am
+1 day
7:04 pm — 10:30 pm F92112 Frontier Airlines
Chicago — Philadelphia
6h 22m stop
6:15 am — 8:29 am F93339 Frontier Airlines
Philadelphia — Denver
13h 1m
including layover
Find flight
from$74
8:52 pm — 8:29 am
+1 day
8:55 pm — 11:59 pm F94368 Frontier Airlines
Chicago — Philadelphia
6h 19m stop
6:15 am — 8:37 am F93339 Frontier Airlines
Philadelphia — Denver
12h 37m
including layover
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from$76
9:08 am — 6:41 pm
9:17 am — 1:11 pm F92792 Frontier Airlines
Chicago — Orlando
3h 27m stop
6:00 am — 8:18 am F91733 Frontier Airlines
Orlando — Denver
10h 33m
including layover
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from$86
9:12 pm — 7:59 am
+1 day
8:00 am — 11:51 am F93854 Frontier Airlines
Chicago — Orlando
5h 7m stop
6:00 am — 8:21 am F91733 Frontier Airlines
Orlando — Denver
11h 47m
including layover
Find flight
from$91
*Departure and arrival times are local. Last updated on 06/02/2025

Flight Information

There are 4 flights by Frontier Airlines from Chicago to Denver every week with departures from Chicago FSS, Midway, O'Hare International, Chicago NAS, Merrill C Meigs (closed), Dupage County, Pal-Waukee. All flights arrive at Denver International and Arapahoe Co.

Departures start from 10:56 pm to 9:58 am. Nonstop flight is 2h 41m. The time difference between Chicago and Denver is 1h.

  • The fastest flight 2h 41m
  • Average flight time 2h 44m
  • The earliest flight 10:56 pm
  • The latest flight 9:58 am
  • Distance 900 ml

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

The most expensive and popular months are april (from 140 $), september (from 114 $), may (from 110 $).

The cheapest flight by Frontier Airlines that our users were able to find is $45. This airfare is economy class on one-way F91483 flight for June 28, 2025 leaving O'Hare International in Chicago at 6:00 am, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides Frontier Airlines there are other 8 airline carriers between Chicago and Denver. Please review schedules and prices from the most popular airlines to find the best airfare deals from Chicago to Denver.

Nonstop flights

There are 25 direct flights every day from Chicago. Airlines and fares are below:

See more direct flights

Connecting Flights

List of flights with layovers (1 and more stops):

  • from $133
    Find
  • AS - Alaska Airlines
    from $125
    Find
  • EI - Aer Lingus
    from $1299
    Find
  • SY - Sun Country Airlines
    from $96
    Find
  • AY - Finnair
    from $3122
    Find
  • HA - Hawaiian Airlines
    from $124
    Find
  • G4 - Allegiant Air
    from $88
    Find
  • NK - Spirit Airlines
    from $120
    Find
See more connecting flights

How to book an air 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 airfare.
  • 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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