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Flights from Chicago to Denver

Find cheap airlines flights from Chicago to Denver

Choose from 3 carriers that fly from Chicago to Denver, including Frontier Airlines, United Airlines, and American Airlines. Enjoy the cheapest tickets on this route with Frontier Airlines.
Frontier Airlines logo Frontier Airlines United Airlines logo United Airlines American Airlines logo American Airlines

Book direct flights from Chicago to Denver: One way flights from $31, round trip flights from $59. Find flight deals for the next 3 months below.

      • Cheapest nonstop
        ORD 10:07 PM
        2h 51m
        Nonstop
        DEN 11:58 PM
        Chicago - Denver | Sun, Jan 11 | Frontier Airlines
        DEN 5:41 PM
        2h 43m
        Nonstop
        ORD 9:24 PM
        Denver - Chicago | Fri, Jan 16 | Frontier Airlines
        $59 $104
        44% OFF
        44% OFF
        $104 $59
      • MDW 3:00 PM
        2h 49m
        Nonstop
        DEN 4:49 PM
        Chicago - Denver | Mon, Jan 12 | Frontier Airlines
        DEN 5:41 PM
        2h 43m
        Nonstop
        ORD 9:24 PM
        Denver - Chicago | Thu, Jan 15 | Frontier Airlines
        $59 $104
        43% OFF
        43% OFF
        $104 $59
      • ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Fri, Jan 30 | Frontier Airlines
        DEN 7:10 AM
        2h 47m
        Nonstop
        ORD 10:57 AM
        Denver - Chicago | Fri, Feb 6 | Frontier Airlines
        $62 $104
        41% OFF
        41% OFF
        $104 $62
      • ORD 2:30 PM
        3h 11m
        Nonstop
        DEN 4:41 PM
        Chicago - Denver | Sun, Jan 18 | Frontier Airlines
        DEN 7:10 AM
        2h 47m
        Nonstop
        ORD 10:57 AM
        Denver - Chicago | Fri, Jan 23 | Frontier Airlines
        $70
        32% OFF
        $104 $70
      • MDW 3:05 PM
        2h 49m
        Nonstop
        DEN 4:54 PM
        Chicago - Denver | Fri, Jan 9 | Frontier Airlines
        DEN 3:02 PM
        2h 43m
        Nonstop
        ORD 6:45 PM
        Denver - Chicago | Mon, Jan 12 | Frontier Airlines
        $75
        28% OFF
        $104 $75
      • ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Fri, Feb 6 | Frontier Airlines
        DEN 7:10 AM
        2h 47m
        Nonstop
        ORD 10:57 AM
        Denver - Chicago | Sun, Feb 8 | Frontier Airlines
        $80
        23% OFF
        $104 $80
      • ORD 2:30 PM
        3h 11m
        Nonstop
        DEN 4:41 PM
        Chicago - Denver | Mon, Jan 19 | Frontier Airlines
        DEN 4:30 PM
        2h 40m
        Nonstop
        ORD 8:10 PM
        Denver - Chicago | Thu, Jan 22 | American Airlines
        $86
        17% OFF
        $104 $86
      • ORD 7:41 PM
        3h
        Nonstop
        DEN 9:41 PM
        Chicago - Denver | Thu, Jan 22 | Frontier Airlines
        DEN 2:57 PM
        2h 34m
        Nonstop
        ORD 6:31 PM
        Denver - Chicago | Thu, Jan 29 | Frontier Airlines
        $89
        14% OFF
        $104 $89
      • MDW 9:45 AM
        6h 31m
        1 stop
        DEN 3:16 PM
        Chicago - Denver | Mon, Feb 2 | Frontier Airlines
        DEN 2:57 PM
        2h 34m
        Nonstop
        ORD 6:31 PM
        Denver - Chicago | Thu, Feb 5 | Frontier Airlines
        $89
        15% OFF
        $104 $89
      • ORD 8:00 AM
        7h 54m
        1 stop
        DEN 2:54 PM
        Chicago - Denver | Sat, Jan 31 | Frontier Airlines
        DEN 2:57 PM
        2h 34m
        Nonstop
        ORD 6:31 PM
        Denver - Chicago | Thu, Feb 5 | Frontier Airlines
        $89
        14% OFF
        $104 $89
      • CHI 1:00 PM
        17h 25m
        1 stop
        DEN Invalid Date
        Chicago - Denver | Mon, Dec 15 | Normal Airline
        DEN 3:00 PM
        6h
        Nonstop
        CHI 4:00 PM
        Denver - Chicago | Wed, Dec 17 | Normal Airline
        Find More Flights
        Find More Flights
      • Cheapest nonstop
        ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Fri, Jan 30 | Frontier Airlines
        $31 $53
        41% OFF
        41% OFF
        $53 $31
      • ORD 7:00 AM
        2h 56m
        Nonstop
        DEN 8:56 AM
        Chicago - Denver | Thu, Jan 1 | Frontier Airlines
        $41 $53
        24% OFF
        24% OFF
        $53 $41
      • ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Sun, Jan 25 | Frontier Airlines
        $45 $53
        16% OFF
        16% OFF
        $53 $45
      • MDW 9:09 PM
        2h 50m
        Nonstop
        DEN 10:59 PM
        Chicago - Denver | Mon, Jan 19 | Frontier Airlines
        $45
        15% OFF
        $53 $45
      • ORD 7:50 PM
        2h 59m
        Nonstop
        DEN 9:49 PM
        Chicago - Denver | Mon, Jan 12 | Frontier Airlines
        $45
        15% OFF
        $53 $45
      • ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Fri, Jan 23 | Frontier Airlines
        $45
        15% OFF
        $53 $45
      • ORD 10:07 PM
        2h 51m
        Nonstop
        DEN 11:58 PM
        Chicago - Denver | Sun, Jan 11 | Frontier Airlines
        $45
        15% OFF
        $53 $45
      • ORD 2:30 PM
        3h 11m
        Nonstop
        DEN 4:41 PM
        Chicago - Denver | Sun, Jan 18 | Frontier Airlines
        $46
        14% OFF
        $53 $46
      • ORD 7:41 PM
        3h
        Nonstop
        DEN 9:41 PM
        Chicago - Denver | Thu, Jan 22 | Frontier Airlines
        $46
        14% OFF
        $53 $46
      • ORD 12:07 PM
        2h 58m
        Nonstop
        DEN 2:05 PM
        Chicago - Denver | Sun, Feb 8 | Frontier Airlines
        $46
        14% OFF
        $53 $46
      • CHI 1:00 PM
        17h 25m
        1 stop
        DEN Invalid Date
        Chicago - Denver | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Chicago to Denver are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight Info | Chicago to Denver

The distance between Chicago and Denver is approximately 1,446.63 km. It takes around 3 hours 8 minutes on average to fly from Chicago to Denver. Based on Trip.com's data travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight price$31
Cheapest round-trip ticket price$59
Off-season for travelOctober
Peak season for travelJuly
Flight distance1,446.63 km
Average flight time3 hours 8 minutes
Popular airlineFrontier Airlines

When is the cheapest time to fly from Chicago to Denver?

The cheapest time for Chicago to Denver flights: Jan 25 to Feb 1 — one way flight prices from $31.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Chicago to Denver, calculated over the upcoming 10 weeks.

Frequently Asked Questions

  • What are the cheapest flights from Chicago to Denver (CHI-DEN)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as $31 on Cheapest nonstop routes (e.g. ORD to DEN on Fri, Jan 30), while Frontier Airlines offers Cheapest nonstop round-trips from $59 departing on Sun, Jan 11 and returning on Fri, Jan 16.
  • At the moment, you can catch a nonstop flight from Chicago to Denver with the following airlines, including: Frontier Airlines United Airlines American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 3 hours 8 minutes to fly from Chicago (CHI) to Denver (DEN).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Denver is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 114 flight per week flying from Chicago to Denver. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA791 (07:28) United Airlines: S/M/T/-/-/F/S -- UA490 (09:48) American Airlines: S/M/T/W/T/F/S -- AA2833 (08:58)
  • To find best deals on flights from Chicago to Denver, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Jan 30, with one-way flights priced at just $31.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Denver travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to Denver is October, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Chicago to Denver on December 18, 2025 with Frontier Airlines, with prices starting at $79.
  • You can land at any one of the following hubs in Denver, with O'Hare International Airport to Denver International Airport (ORD-DEN) is by far the most common option on this route: Denver International Airport (DEN) Rocky Mountain Metropolitan Airport (BJC).
  • The time difference between Denver and Chicago is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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