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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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — DEN
juin 17 — juin 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Chicago to Denver Intl are usually found in September or November, 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 juin 12, 2025.

Round-trip from

$136
(Cheapflightsfares)

One-way from

$78
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$216

Good round-trip deal

$176 or less

Good one-way deal

$100 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. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in June 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 juin 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
mer. 7/167:00 amORD - DEN
Nonstop2h 53mFrontier
lun. 7/218:31 pmDEN - ORD
Nonstop2h 39mFrontier
Deal found 6/10$136
This Priceline deal was found by Cheapflights users on 6/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 8/92:44 pmMDW - DEN
Nonstop2h 49mFrontier
lun. 8/118:15 amDEN - MDW
Nonstop2h 26mFrontier
Deal found 6/12$140
This Southwest deal was found by Cheapflights users on 6/10. 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.
mer. 8/278:50 pmMDW - DEN
Nonstop2h 35mSouthwest
mar. 9/25:50 amDEN - MDW
Nonstop2h 20mSouthwest
Deal found 6/10$157
This Southwest deal was found by Cheapflights users on 6/10. 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.
mar. 8/57:00 amORD - DEN
Nonstop2h 40mSouthwest
sam. 8/99:35 amDEN - ORD
Nonstop2h 30mSouthwest
Deal found 6/10$158
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/37:00 amORD - DEN
Nonstop2h 36mAmerican Airlines
lun. 10/67:27 amDEN - ORD
Nonstop2h 32mAmerican Airlines
Deal found 6/11$175
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/155:20 pmORD - DEN
1 stop6h 46mDelta
sam. 7/196:35 amDEN - ORD
1 stop7h 28mDelta
Deal found 6/10$217
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/156:20 pmMDW - DEN
1 stop5h 46mDelta
lun. 7/2112:55 amDEN - MDW
1 stop6h 49mDelta
Deal found 6/10$217
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/46:35 pmORD - DEN
Nonstop3h 01mUnited Airlines
lun. 7/78:55 pmDEN - ORD
Nonstop2h 35mUnited Airlines
Deal found 6/11$260
This Sun Country Air deal was found by Cheapflights users on 6/10. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 7/912:30 pmORD - DEN
1 stop21h 53mSun Country Air
ven. 7/185:49 pmDEN - ORD
1 stop22h 26mSun Country Air
Deal found 6/10$265

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 juin 12, 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

mer. 7/16

7:00 am-8:53 am

Nonstop2h 53m

Denver Intl

lun. 7/21

8:31 pm-12:10 am

Nonstop2h 39m

$136

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

sam. 8/9

2:44 pm-4:33 pm

Nonstop2h 49m

Denver Intl

lun. 8/11

8:15 am-11:41 am

Nonstop2h 26m

$140

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

mer. 8/27

8:50 pm-10:25 pm

Nonstop2h 35m

Denver Intl

mar. 9/2

5:50 am-9:10 am

Nonstop2h 20m

$157

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

mar. 8/5

7:00 am-8:40 am

Nonstop2h 40m

Denver Intl

sam. 8/9

9:35 am-1:05 pm

Nonstop2h 30m

$158

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

mar. 8/5

6:48 am-8:22 am

Nonstop2h 34m

Denver Intl

sam. 8/9

5:32 pm-9:18 pm

Nonstop2h 46m

$168

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

mar. 7/15

5:20 pm-11:06 pm

1 stop6h 46m

Denver Intl

lun. 7/21

12:55 am-7:49 am

1 stop5h 54m

$217

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

mar. 7/15

6:20 pm-11:06 pm

1 stop5h 46m

Denver Intl

lun. 7/21

12:55 am-8:44 am

1 stop6h 49m

$217

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

ven. 7/4

6:35 pm-8:36 pm

Nonstop3h 01m

Denver Intl

lun. 7/7

8:55 pm-12:30 am

Nonstop2h 35m

$260

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

mer. 6/25

11:50 am-8:07 pm

1 stop9h 17m

Denver Intl

jeu. 6/26

8:21 pm-11:59 pm

Nonstop2h 38m

$264

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

mer. 7/9

12:30 pm-9:23 am

1 stop21h 53m

Denver Intl

ven. 7/18

5:49 pm-5:15 pm

1 stop22h 26m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 24 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 June 9, 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 juin 12, 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 28% 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 June 8, 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 juin 12, 2025.

The most flights from CHI to DEN are scheduled on a Thursday (74 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (40 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 juin 12, 2025.
To help decide which airline to fly from Chicago to Denver, see what other customers have to say about Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Allegiant Air
7.3
Good
725 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 59 inbound flights from Chicago per day.

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

    Frontier, at $136, was found to be the cheapest airline from Chicago to Denver.Alternate airlines to your destination round-trip include Southwest and American Airlines. Users have found that Frontier is 29% 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 American Airlines. Other airlines that offer cheap prices include Southwest from $79 and United Airlines from $80 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 Copa Airlines (79%), Frontier (77%) and Royal Jordanian (75%).

  • What are the cheapest flights from Chicago to Denver?

    Looking at all options, your cheapest flight can be booked for $76. While the most popular route (Chicago O'Hare Intl - Denver Intl) can be booked for $130 on average our data indicates $681 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 Chicago?

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

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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.
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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 juin 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$141FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$151Average$239FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$156Average$291FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$160Average$261FlexibilityNo cancel feeOn-time63%

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