Cheap flights from Illinois to Denver (DEN) from $39

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ORD — DEN
Mar 24 — Mar 311

How far in advance should I book a flight from Illinois to Denver?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 29 days in advance, which can save you up to 32% on flights from Illinois to Denver compared to booking the week you need them. Waiting 29 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $198. For sooner than that we have options available in the next 3 days from $323.

What is the cheapest month to fly from Illinois to Denver?

January can be a great time to fly to Denver from Illinois with a flight ticket averaging about $213. Cheapflights users have found deals in the month of January for as cheap as $50. The most expensive prices can be found in the month of June.

When is the cheapest time to fly from Illinois to Denver (IL - DEN)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Denver as you normally would.

Cheap Allegiant Air flights from Illinois to Denver

Explore cheap flight options specifically provided by Allegiant Air for the route between Illinois and Denver. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Take a peek at the cheapest Allegiant Air flights we've detected traveling from Illinois to Denver. Make sure to check back often as deals are often changing.
Mon 6/33:43 pmPIA - DEN
Nonstop2h 27mAllegiant Air
Fri 6/145:45 pmDEN - PIA
Nonstop2h 04mAllegiant Air
Deal found 3/18$115
Mon 4/159:15 amPIA - DEN
Nonstop2h 27mAllegiant Air
Mon 4/2211:32 amDEN - PIA
Nonstop2h 05mAllegiant Air
Deal found 3/18$125
Mon 5/279:56 amPIA - DEN
Nonstop2h 27mAllegiant Air
Fri 5/316:00 pmDEN - PIA
Nonstop2h 02mAllegiant Air
Deal found 3/18$135
Mon 6/173:36 pmPIA - DEN
Nonstop2h 19mAllegiant Air
Fri 6/215:45 pmDEN - PIA
Nonstop2h 04mAllegiant Air
Deal found 3/18$185
Fri 8/93:37 pmPIA - DEN
Nonstop2h 20mAllegiant Air
Fri 8/1611:48 amDEN - PIA
Nonstop2h 03mAllegiant Air
Deal found 3/18$195
Fri 3/299:10 amPIA - DEN
Nonstop2h 26mAllegiant Air
Mon 4/111:26 amDEN - PIA
Nonstop2h 01mAllegiant Air
Deal found 3/18$218
Fri 7/53:37 pmPIA - DEN
Nonstop2h 20mAllegiant Air
Fri 7/125:47 pmDEN - PIA
Nonstop2h 00mAllegiant Air
Deal found 3/17$235
Mon 3/259:10 amPIA - DEN
Nonstop2h 26mAllegiant Air
Fri 3/2911:26 amDEN - PIA
Nonstop2h 01mAllegiant Air
Deal found 3/17$275

Cheap Frontier flights from Illinois to Denver

Explore cheap flight options specifically provided by Frontier for the route between Illinois and Denver. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Have a look at some of the cheapest available Frontier flights departing from Illinois and landing in Denver. Deals are refreshing constantly so come back soon for more options.
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 4/249:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$58
Sat 4/1310:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$61
Sat 4/138:04 pmSTL - DEN
Nonstop2h 31mFrontier
Tue 4/1612:45 pmDEN - STL
Nonstop2h 05mFrontier
Deal found 3/16$63
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/229:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$67
Mon 4/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 4/169:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$68
Thu 5/96:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 5/188:40 pmDEN - ORD
Nonstop2h 31mFrontier
Deal found 3/17$69
Thu 5/26:27 pmORD - DEN
Nonstop2h 55mFrontier
Sun 5/59:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$70
Fri 4/125:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$71
Thu 5/168:00 amORD - DEN
Nonstop2h 45mFrontier
Wed 5/229:27 pmDEN - ORD
Nonstop2h 36mFrontier
Deal found 3/18$73

Cheap Illinois to Denver flights in March & April 2024

Find cheap flight options from Illinois to Denver specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
The lowest fares we've come across on flights traveling from Illinois to Denver in March and April 2024. Check back in a little while for more flight options.
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 4/249:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$58
Wed 4/178:04 pmSTL - DEN
Nonstop2h 31mFrontier
Wed 4/246:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 3/18$58
Wed 4/105:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/135:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$58
Sat 4/1310:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$61
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/229:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$67
Wed 4/175:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$67
Mon 4/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 4/169:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$68
Fri 4/265:35 pmSTL - DEN
Nonstop2h 28mFrontier
Wed 5/16:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 3/18$68
Wed 4/105:30 amMDW - DEN
Nonstop2h 46mFrontier
Thu 4/115:11 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$68

Illinois to Denver 2024 flight deals

Discover exclusive flight deals for travel between Illinois and Denver in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
The lowest fares we've come across on flights traveling from Illinois to Denver in March and April 2024. Check back in a little while for more flight options.
Sat 4/1310:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$61
Thu 5/26:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/19$62
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/229:27 pmDEN - ORD
Nonstop2h 36mFrontier
Deal found 3/18$63
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/229:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$67
Wed 4/175:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$67
Thu 4/116:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 4/179:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/18$68
Fri 4/265:35 pmSTL - DEN
Nonstop2h 28mFrontier
Wed 5/16:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 3/18$68
Wed 4/105:30 amMDW - DEN
Nonstop2h 46mFrontier
Thu 4/115:11 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$68
Sat 4/139:29 pmMDW - DEN
Nonstop2h 47mFrontier
Sun 4/145:06 amDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$69

Non-stop flights to Denver from Illinois

Discover non-stop flight options from Illinois to Denver. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
If you're seeking options on non-stop flights from Illinois to Denver, check out these fares. Users seeking other options on flights from Illinois to Denver should update the search form at the top of the page.
Tue 5/74:57 pmBMI - DEN
Nonstop2h 32mFrontier
Tue 5/1412:30 pmDEN - BMI
Nonstop2h 27mFrontier
Deal found 3/17$58
Wed 4/176:27 pmORD - DEN
Nonstop2h 55mFrontier
Sat 4/209:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/18$58
Wed 4/178:04 pmSTL - DEN
Nonstop2h 31mFrontier
Wed 4/246:41 amDEN - STL
Nonstop2h 06mFrontier
Deal found 3/18$58
Wed 4/105:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/135:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$58
Sat 4/1310:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$61
Thu 5/26:27 pmORD - DEN
Nonstop2h 55mFrontier
Tue 5/79:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/19$62
Wed 5/156:27 pmORD - DEN
Nonstop2h 55mFrontier
Wed 5/229:27 pmDEN - ORD
Nonstop2h 36mFrontier
Deal found 3/18$63
Sat 4/206:27 pmORD - DEN
Nonstop2h 55mFrontier
Mon 4/229:27 pmDEN - ORD
Nonstop2h 29mFrontier
Deal found 3/17$67
Wed 4/175:30 amMDW - DEN
Nonstop2h 46mFrontier
Sat 4/205:14 pmDEN - MDW
Nonstop2h 25mFrontier
Deal found 3/18$67

Illinois to Denver flights leaving soon

Find last-minute flight options from Illinois to Denver for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Check out these flights departing soon from Illinois to Denver. Tip: verify your flight details before completing your reservation.
Wed 3/279:14 amMDW - DEN
Nonstop2h 56mFrontier
Tue 4/25:01 amDEN - MDW
Nonstop2h 23mFrontier
Deal found 3/18$84
Tue 3/2610:04 pmSTL - DEN
Nonstop2h 36mFrontier
Tue 4/26:05 pmDEN - STL
Nonstop2h 09mFrontier
Deal found 3/18$98
Thu 3/2810:56 pmMDW - DEN
Nonstop3h 03mFrontier
Wed 4/35:01 amDEN - MDW
Nonstop2h 23mFrontier
Deal found 3/18$108
Thu 3/289:14 amMDW - DEN
Nonstop2h 56mFrontier
Tue 4/25:01 amDEN - MDW
Nonstop2h 23mFrontier
Deal found 3/18$117
Wed 3/278:45 pmSTL - DEN
Nonstop2h 32mFrontier
Thu 3/287:07 pmDEN - STL
Nonstop2h 08mFrontier
Deal found 3/17$118
Tue 3/265:51 pmMDW - DEN
1 stop7h 52mFrontier
Wed 3/275:01 amDEN - MDW
Nonstop2h 23mFrontier
Deal found 3/18$120
Wed 3/279:14 amMDW - DEN
Nonstop2h 56mFrontier
Tue 4/27:22 pmDEN - MDW
1 stop13h 24mFrontier
Deal found 3/18$125
Tue 3/269:14 amMDW - DEN
Nonstop2h 56mFrontier
Wed 3/275:01 amDEN - MDW
Nonstop2h 23mFrontier
Deal found 3/18$126
Mon 3/258:45 pmSTL - DEN
Nonstop2h 32mFrontier
Sun 4/2111:20 amDEN - STL
Nonstop2h 09mFrontier
Deal found 3/17$128

One-way flights to Denver from Illinois

Search for one-way flight options from Illinois to Denver. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
If you're seeking multiple options on one-way flights from Illinois to Denver, be sure to check out these deals, which are updated often. Those seeking round-trip flights from Illinois to Denver should utilize the search form at the the top of the page.
Sun 5/56:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 3/18$39
Thu 4/1811:18 amSTL - DEN
Nonstop2h 29mFrontier
Deal found 3/18$39
Thu 4/118:05 pmMDW - DEN
Nonstop2h 47mFrontier
Deal found 3/18$39
Mon 4/296:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 3/18$40
Mon 4/295:30 amMDW - DEN
Nonstop2h 46mFrontier
Deal found 3/18$40
Fri 4/510:59 pmMDW - DEN
Nonstop3h 03mFrontier
Deal found 3/17$42
Thu 4/186:27 pmORD - DEN
Nonstop2h 55mFrontier
Deal found 3/17$44
Mon 4/89:14 amMDW - DEN
Nonstop2h 56mFrontier
Deal found 3/18$44
Sat 5/188:00 pmSTL - DEN
Nonstop2h 28mFrontier
Deal found 3/18$47

Find flights from Illinois to Denver within your budget

Customize your flight search to find flights from Illinois 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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$58 - $165

Route

Depart

Return

Price

Bloomington-NormalDenver Intl

BMI - DEN

BMIDEN

Bloomington-Normal

Tue 5/7

Nonstop2h 32m

Denver Intl

Tue 5/14

Nonstop2h 27m

$58

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Sat 4/20

Nonstop2h 55m

Denver Intl

Wed 4/24

Nonstop2h 29m

$58

Lambert-St LouisDenver Intl

STL - DEN

STLDEN

Lambert-St Louis

Tue 4/30

Nonstop2h 30m

Denver Intl

Tue 5/7

Nonstop2h 05m

$58

Chicago MidwayDenver Intl

MDW - DEN

MDWDEN

Chicago Midway

Sat 4/13

Nonstop2h 47m

Denver Intl

Wed 4/17

Nonstop2h 27m

$58

Chicago MidwayDenver Intl

MDW - DEN

MDWDEN

Chicago Midway

Sat 4/13

Nonstop2h 46m

Denver Intl

Sat 4/20

Nonstop2h 25m

$61

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Wed 4/17

Nonstop2h 55m

Denver Intl

Sat 4/20

1 stop10h 18m

$81

Greater PeoriaDenver Intl

PIA - DEN

PIADEN

Greater Peoria

Mon 6/3

Nonstop2h 27m

Denver Intl

Fri 6/14

Nonstop2h 04m

$115

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Mon 4/8

Nonstop2h 40m

Denver Intl

Mon 4/15

Nonstop2h 29m

$161

Chicago O'Hare IntlDenver Intl

ORD - DEN

ORDDEN

Chicago O'Hare Intl

Mon 6/3

Nonstop2h 38m

Denver Intl

Sun 6/9

Nonstop2h 35m

$165

Flights are sorted by cheapest first

Deals found on 3/18

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 March 19, 2024.
Get a feel of what it's like to fly with Allegiant Air, Frontier and American Airlines from Illinois to Denver by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,382 reviews
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
9,150 reviews
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
11,551 reviews
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.5
Good
1,078 reviews
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.4
Good
11,602 reviews
Southwest
8.2
Very good
6,382 reviews

Overall

8.2

Entertainment

7.9

Crew

8.8

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

    For a flight from Illinois to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city.

  • Can I find flights from Illinois to Denver for under $100 on Cheapflights?

    Yes, there are multiple flights from Illinois to Denver for under $100. The cheapest flight booked recently is on Frontier for just $58, but on average you can expect to pay $67.

  • Are there nonstop flights from Illinois to Denver for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Illinois to Denver under $100. A good price for a nonstop flight from Illinois to Denver is less than $67.

  • Are there last-minute flights available from Illinois to Denver for under $100?

    There are currently 20+ open flights from Illinois to Denver within the next 7 days for less than $100.

  • What days are nonstop flights available from Illinois to Denver?

    Nonstop flights are available for this route on the following days: Sunday, Thursday, Friday, Saturday.

  • How many flights depart from Illinois to Denver on average per day?

    On average 12 flights depart from Illinois to Denver per day.
    Morning (6am - Noon) - 25% of flight departures
    Afternoon (Noon - 6pm) - 8% of flight departures
    Evening (6pm - Midnight) - 67% of flight departures

  • How long is the flight from Illinois to Denver?

    Airlines like Frontier fly from Illinois to Denver in about 2h 32m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 891 mi. All flights are typically nonstop.

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

    The cheapest airlines for a one-way flight from Illinois to Denver are Frontier ($39), Sun Country Air ($50), and United Airlines ($66).

  • What are the most popular routes from Illinois to Denver?

  • What are the most popular airlines that fly from Illinois to Denver?

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

    The top 3 most reliable airlines when flying from Illinois to Denver are United Airlines (85%), Air Canada (83%) and Southwest (83%).

  • What are the cheapest flights from Illinois to Denver?

    While on average a flight from Illinois to Denver is generally $565, our data shows the cheapest flight currently is $58. When looking at the most popular route, (Chicago O'Hare Intl - Denver Intl), you can expect to pay $73 for that flight.

  • What does ORD to DEN mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Chicago O'Hare Intl Airport to Denver Intl Airport flight would often be abbreviated as a ORD to DEN flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Denver
See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Illinois to Denver

Discover the top 7 airlines that operate flights from Illinois 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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$36Average$140FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$99Average$166FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
United AirlinesCheapest$100Average$345FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Allegiant AirCheapest$102Average$196FlexibilityNo cancel feeOn-time88%
Search Allegiant Air flights
American AirlinesCheapest$109Average$439FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Denver Air ConnectionCheapest$144Average$247FlexibilityNo cancel feeOn-timeN/A
Search Denver Air Connection flights
DeltaCheapest$195Average$392FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

Search flights from Illinois to Denver by cabin class

Find flights from Illinois to Denver, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from Illinois to Denver

Find hourly flight availability from Illinois 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 March 19, 2024.
3%of flight departuresEarly morningMidnight to 6 am
49%of flight departuresMorning6 am to noon
33%of flight departuresAfternoonNoon to 6 pm
15%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Denver?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Denver from Illinois today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Illinois to Denver?

Cheapflights simply makes it quick and affordable to book flights from Illinois to Denver by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Illinois to Denver with no change fees?

Yes, we can. To see specific flights from Illinois to Denver with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Illinois to Denver become cheaper?

Yes, Cheapflights offers price alerts on Illinois to Denver flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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