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$80+ 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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — DEN
mrt. 25 — apr. 11
wo 3/25
wo 4/1
1 adult, Economy
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Find cheap flights from Chicago to Denver with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Chicago to Denver Intl are usually found in October or September, booked 71 days in advance, depart on a Saturday or Wednesday and return on a Thursday

Cheap 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 februari 23, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
do 4/164:13 pm
ORD
-
DEN
1 stop7h 46m
Frontier
ma 4/206:15 am
DEN
-
ORD
Nonstop2h 35m
Frontier
Deal found 2/20$114
This Frontier deal was found by Cheapflights users on 2/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
do 3/1210:53 am
ORD
-
DEN
Nonstop2h 59m
Frontier
ma 3/169:19 pm
DEN
-
ORD
Nonstop2h 38m
Frontier
Deal found 2/21$115
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
do 4/2310:55 am
ORD
-
DEN
Nonstop3h 03m
Frontier
ma 4/276:15 am
DEN
-
ORD
Nonstop2h 35m
Frontier
Deal found 2/19$116
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
vr 4/1710:55 am
ORD
-
DEN
Nonstop3h 03m
Frontier
ma 4/206:15 am
DEN
-
ORD
Nonstop2h 35m
Frontier
Deal found 2/20$117
This Cheapflightsfares deal was found by Cheapflights users on 2/23. 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.
vr 3/136:20 pm
ORD
-
DEN
Nonstop3h 04m
Frontier
ma 3/169:19 pm
DEN
-
ORD
Nonstop2h 38m
Frontier
Deal found 2/23$118
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 3/136:20 pm
ORD
-
DEN
Nonstop3h 04m
Frontier
za 3/219:00 pm
DEN
-
ORD
Nonstop2h 38m
Frontier
Deal found 2/19$119
This Cheapflightsfares deal was found by Cheapflights users on 2/23. 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.
vr 4/102:29 pm
ORD
-
DEN
Nonstop3h 11m
Frontier
wo 4/158:25 pm
DEN
-
ORD
1 stop14h 48m
Frontier
Deal found 2/23$120
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 4/102:29 pm
ORD
-
DEN
Nonstop3h 11m
Frontier
di 4/1411:59 pm
DEN
-
ORD
1 stop9h 03m
Frontier
Deal found 2/19$121
This Expedia deal was found by Cheapflights users on 2/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
do 5/74:28 pm
ORD
-
DEN
1 stop7h 35m
Frontier
zo 5/106:15 am
DEN
-
ORD
Nonstop2h 35m
Frontier
Deal found 2/22$122
This Super.com deal was found by Cheapflights users on 2/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 4/102:29 pm
ORD
-
DEN
Nonstop3h 11m
Frontier
ma 4/139:45 am
DEN
-
ORD
Nonstop2h 34m
Frontier
Deal found 2/22$123
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vr 4/105:11 pm
MDW
-
DEN
1 stop23h 55m
Frontier
wo 4/1510:40 pm
DEN
-
MDW
1 stop15h 24m
Frontier
Deal found 2/23$134
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
do 4/95:11 pm
MDW
-
DEN
1 stop7h 47m
Frontier
do 4/166:30 am
DEN
-
MDW
1 stop7h 34m
Frontier
Deal found 2/23$139

Find 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 februari 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$114
(Cheapflightsfares)

One-way from

$80
(Priceline)

Popular in

December

Cheapest in

October

Average price

$224

Good round-trip deal

$223 or less

Good one-way deal

$132 or less
Provider with most accurate pricing for Chicago (CHI)-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Denver Intl flights.
Search Deals
From Chicago (CHI) to Denver Intl
Search Deals
One-way flight from Chicago (CHI) to Denver Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to Denver Intl.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Denver Intl.
Search Deals

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 februari 23, 2026.
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

wo 4/8

10:30 am-12:15 pm

Nonstop2h 45m

Denver Intl

wo 4/15

11:25 am-3:00 pm

Nonstop2h 35m

$179

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

za 3/14

6:20 pm-8:05 pm

Nonstop2h 45m

Denver Intl

di 3/17

10:10 am-1:55 pm

Nonstop2h 45m

$180

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

do 4/9

6:00 am-7:40 am

Nonstop2h 40m

Denver Intl

zo 4/12

5:55 am-9:20 am

Nonstop2h 25m

$181

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

za 4/25

7:50 am-11:50 am

1 stop5h 00m

Denver Intl

wo 4/29

6:35 am-9:55 am

Nonstop2h 20m

$186

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

di 4/7

2:40 pm-6:55 pm

1 stop5h 15m

Denver Intl

za 4/11

6:30 am-9:50 am

Nonstop2h 20m

$201

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

ma 3/30

2:40 pm-11:20 pm

2 stops9h 40m

Denver Intl

di 4/7

1:15 pm-10:55 pm

1 stop8h 40m

$206

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

ma 3/30

7:45 am-11:20 am

1 stop4h 35m

Denver Intl

di 4/7

8:40 am-2:55 pm

2 stops5h 15m

$206

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

do 4/2

5:40 am-7:25 am

Nonstop2h 45m

Denver Intl

ma 4/6

7:30 pm-10:50 pm

Nonstop2h 20m

$208

ChicagoDenver

ORD - DEN

ORDDEN

Chicago O'Hare Intl

za 4/25

2:05 pm-10:20 pm

2 stops9h 15m

Denver Intl

wo 4/29

12:05 pm-11:55 pm

2 stops10h 50m

$211

ChicagoDenver

MDW - DEN

MDWDEN

Chicago Midway

vr 4/24

5:21 pm-12:36 am

1 stop8h 15m

Denver Intl

zo 4/26

6:10 am-12:43 pm

1 stop5h 33m

$212

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 45 results
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Compare providers for flights from Chicago to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Denver in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 February 20, 2026.

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 71 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, March is the cheapest month in which you can book a flight from Chicago to Denver (average of $57). Flying from Chicago to Denver in July is currently the most expensive (average of $113). 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 februari 23, 2026.

A simple way to save on the total cost of your ticket is to fly from Chicago to Denver in the morning. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight in the afternoon.

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 February 21, 2026.

Travelers seeking maximum savings on their Chicago to Denver flight should consider departing on Saturday evenings 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 februari 23, 2026.

The most flights from CHI to DEN are scheduled on a Friday (69 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (40 on average).

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

How often are flights from Chicago to Denver delayed?

About 19% of weekly flights between Chicago and Denver have experienced delays in the past year, with the average delay time being 143 minutes.

What is the most punctual flight time for Chicago to Denver flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to Denver flights?

Over the last year, Frontier have had the lowest number of delays on this route, with just 16% of flights being delayed.

The best insider tips for Chicago to Denver flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Denver trip
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

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 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

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 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

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 februari 23, 2026.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American 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
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,300 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,342 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,339 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,898 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,043 reviews
Southwest
8.0
Very good
4,300 reviews

Overall

8.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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. 5 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 52 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Denver?

    A quick flight from Chicago to Denver can take about 2h 45m. Southwest provides one of the quickest options available for as low as $179. There are 886 mi between Chicago and Denver. Generally, flights for this route are nonstop.

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

    Frontier, at $62, was found to be the cheapest airline from Chicago to Denver.Alternate airlines to your destination round-trip include JetBlue and American Airlines. Users have found that Frontier is 70% 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 $42 on Frontier. Other airlines that offer cheap prices include Southwest from $75 and American Airlines 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 Air Canada (85%), United Airlines (82%) and SWISS (81%).

  • What are the cheapest flights from Chicago to Denver?

    Looking at all options, your cheapest flight can be booked for $81. While the most popular route (Chicago O'Hare Intl - Denver Intl) can be booked for $109 on average, our data indicates $543 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, March is the cheapest month in which you can book a flight from Chicago to Denver (average of $57). Flying from Chicago to Denver in July is currently the most expensive (average of $113). 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
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Chicago to Denver

Discover the top 5 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 februari 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$165FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$145Average$223FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$154Average$240FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$155Average$276FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$258FlexibilityNo cancel feeOn-time63%

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