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$78+ Cheap flights from Chicago (CHI) to Denver (DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — DEN
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Denver Intl are usually found in November or September, booked 30 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap flight deals from Chicago to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2025.

Round-trip from

$119
(Cheapflightsfares)

One-way from

$78
(Cheapflightsfares)

Popular in

December

Cheapest in

November

Average price

$203

Good round-trip deal

$156 or less

Good one-way deal

$96 or less
From Chicago (CHI) to Denver Intl
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One-way flight from Chicago (CHI) to Denver Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Chicago (CHI) to Denver Intl.
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Price to beat on a one-way flight from Chicago (CHI) to Denver Intl.
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Find flight deals from Chicago to Denver

Cheapest flights from Chicago to Denver
Explore the most affordable flight options available from Chicago to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/126:00 amORD - DEN
Nonstop2h 45mFrontier
Mon 9/158:30 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 7/27$122
This CheapOair deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:29 pmMDW - DEN
Nonstop2h 48mFrontier
Mon 10/207:10 pmDEN - MDW
Nonstop2h 28mFrontier
Deal found 7/25$122
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:25 pmMDW - DEN
Nonstop2h 40mSouthwest
Wed 9/241:10 pmDEN - MDW
Nonstop2h 20mSouthwest
Deal found 7/25$151
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:55 pmORD - DEN
1 stop7h 05mSouthwest
Mon 8/185:00 amDEN - ORD
1 stop7h 05mSouthwest
Deal found 7/26$171

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2025.
Use the filters below to find and compare flights from Chicago to Denver that are best for you.

Fly from

Chicago

Fly to

Denver

Route

Depart

Return

Price

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 9/12

6:00 am-7:45 am

Nonstop2h 45m

Denver Intl

Mon 9/15

8:30 pm-11:59 pm

Nonstop2h 29m

$122

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

Fri 10/17

4:29 pm-6:17 pm

Nonstop2h 48m

Denver Intl

Mon 10/20

7:10 pm-10:38 pm

Nonstop2h 28m

$122

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

Sat 9/20

7:25 pm-9:05 pm

Nonstop2h 40m

Denver Intl

Wed 9/24

1:10 pm-4:30 pm

Nonstop2h 20m

$151

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Sat 8/16

2:55 pm-9:00 pm

1 stop7h 05m

Denver Intl

Mon 8/18

5:00 am-1:05 pm

1 stop7h 05m

$171

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Tue 8/26

7:15 am-8:59 am

Nonstop2h 44m

$79

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

Sat 9/27

5:05 pm-6:40 pm

Nonstop2h 35m

$79

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 8/15

5:40 am-7:30 am

Nonstop2h 50m

$80

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

Fri 9/19

3:48 pm-5:32 pm

Nonstop2h 44m

$82

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Sat 8/23

2:55 pm-9:00 pm

1 stop7h 05m

$86

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Fri 8/15

7:10 am-8:51 am

Nonstop2h 41m

$91

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 13 results
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The best insider tips for Chicago to Denver flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Denver trip
Airlines
Frontier

Frontier's UpFront Plus guarantees an empty middle seat, enhancing comfort for a fee.


Frontier's Economy Bundle includes a carry-on, seat selection, and no change fees.

Read more about Frontierby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom seats, ideal for added comfort on domestic flights.


United's MileagePlus allows pooling miles, a great way to gather enough for a ticket.

Read more about United Airlinesby Harriet Baskas
Airports
ORD

Use the free shuttle train at ORD to navigate between terminals efficiently, especially if you have a tight connection.

Read more about ORDby Ramsey Qubein
MDW

Order food via MDW's mobile system to your gate to avoid missing Southwest's open seating boarding process.

Read more about MDWby Ramsey Qubein
DEN

Take the A Line train from DEN to Union Station for a cost-effective and efficient trip to downtown Denver.

Read more about DENby Emily Zemler
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on ORD and MDW

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Chicago to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Denver

How far ahead should I book a flight from Chicago to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Denver. Price data was last updated on July 25, 2025.

The price you pay for your flight from Chicago to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 30 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago to Denver?

Currently, October is the cheapest month in which you can book a flight from Chicago to Denver (average of $197). Flying from Chicago to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to DEN?

Find hourly flight availability from Chicago to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Chicago to Denver in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Chicago to Denver?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Denver. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Chicago to Denver flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Denver

Explore weekly flight availability from Chicago to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

The most flights from CHI to DEN are scheduled on a Monday (79 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (46 on average).

How much does it cost to fly round-trip from Chicago to Denver?

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated July 28, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Chicago to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,971 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,893 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Sun Country Air
6.9
Okay
332 reviews
Southwest
8.0
Very good
4,237 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Chicago?

    Denver Intl (DEN), located 18.5 mi from the city center, is the airport you fly into when you book flights from Chicago to Denver. 4 airlines have flights to Denver Intl from Chicago on a regular basis. Booking flights from Chicago to Denver Intl should not be difficult; the airport handles an average of 63 inbound flights from Chicago per day.

  • What are the cheapest airlines flying from Chicago to Denver round-trip?

    Frontier, at $119, was found to be the cheapest airline from Chicago to Denver. An alternate airline flying to your destination would be Southwest. Users have found that Frontier is 38% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Chicago to Denver one-way?

    One-way options have recently been found by users for as low as $78 on Frontier. Other airlines that offer cheap prices include United Airlines from $79 and Southwest from $79 one-way.

  • What are the most reliable airlines from Chicago to Denver?

    The top 3 most reliable airlines when flying from Chicago to Denver are Envoy Air (100%), American Airlines (71%) and Iberia (71%).

  • What are the cheapest flights from Chicago to Denver?

    Looking at all options, your cheapest flight can be booked for $79. While the most popular route (Chicago O'Hare Intl - Denver Intl) can be booked for $80 on average our data indicates $548 when flying from Chicago to Denver.

  • Can I find deals for flights from Chicago to Denver that include hotel bookings?

    Yes. In addition to deals on Chicago to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Denver.

  • Can I find deals for business class flights from Chicago to Denver?

    Yes. Cheapflights offers flight deals from Chicago to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Denver?

    Currently, October is the cheapest month in which you can book a flight from Chicago to Denver (average of $197). Flying from Chicago to Denver in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Brighton
Silverthorne
Golden
Thornton
Greeley
Frisco
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Broomfield

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Alternative routes for Chicago to Denver

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Denver flights
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Top 4 airlines flying from Chicago to Denver

Discover the top 4 airlines that operate flights from Chicago to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$148FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$153Average$234FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$157Average$253FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$159Average$293FlexibilityNo cancel feeOn-time69%

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