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$80+ Cheap flights from Peoria, IL to Denver (PIA - 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — DEN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Greater Peoria to Denver Intl are usually found in January or February, booked 55 days in advance, depart on a Friday or Monday and return on a Friday

Cheap flight deals from Peoria to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Peoria (PIA) 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 September 17, 2025.

Round-trip from

$124
(Cheapflightsfares)

One-way from

$80
(Cheapflightsfares)

Popular in

July

Cheapest in

January

Average price

$289

Good round-trip deal

$285 or less

Good one-way deal

$101 or less
From Greater Peoria to Denver Intl
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One-way flight from Greater Peoria to Denver Intl
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Highest demand for flights based on searches. 14% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Greater Peoria to Denver Intl.
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Price to beat on a one-way flight from Greater Peoria to Denver Intl.
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Find flight deals from Peoria to Denver

Cheapest flights from Peoria to Denver
Explore the most affordable flight options available from Peoria to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Mon 9/293:18 pmPIA - DEN
Nonstop2h 16mAllegiant Air
Fri 10/36:41 pmDEN - PIA
Nonstop1h 51mAllegiant Air
Deal found 9/15$124
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 11/73:35 pmPIA - DEN
Nonstop2h 25mAllegiant Air
Mon 11/102:24 pmDEN - PIA
Nonstop1h 57mAllegiant Air
Deal found 9/15$146
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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.
Mon 10/134:35 pmPIA - DEN
Nonstop2h 16mAllegiant Air
Fri 10/176:41 pmDEN - PIA
Nonstop1h 51mAllegiant Air
Deal found 9/15$166
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 10/1310:22 pmPIA - DEN
1 stop10h 50mMultiple Airlines
Fri 10/176:41 pmDEN - PIA
Nonstop1h 51mMultiple Airlines
Deal found 9/15$189
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/148:39 amPIA - DEN
Nonstop2h 41mUnited Airlines
Tue 10/215:52 pmDEN - PIA
Nonstop2h 13mUnited Airlines
Deal found 9/14$209
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Mon 11/39:59 amPIA - DEN
Nonstop2h 16mMultiple Airlines
Wed 11/512:05 pmDEN - PIA
2 stops49h 40mMultiple Airlines
Deal found 9/16$213
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/110:48 amPIA - DEN
1 stop4h 54mUnited Airlines
Sat 10/45:52 pmDEN - PIA
Nonstop2h 13mUnited Airlines
Deal found 9/15$239

Cheapflights Fare Finder

 
Customize your flight search to find flights from Peoria 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 September 17, 2025.
Use the filters below to find and compare flights from Peoria to Denver that are best for you.

Fly from

Peoria

Fly to

Denver

Route

Depart

Return

Price

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Mon 9/29

3:18 pm-4:34 pm

Nonstop2h 16m

Denver Intl

Fri 10/3

6:41 pm-9:32 pm

Nonstop1h 51m

$124

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Fri 11/14

8:43 am-10:35 am

Nonstop2h 52m

Denver Intl

Tue 11/18

6:00 am-12:39 pm

1 stop5h 39m

$219

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Tue 10/28

1:20 pm-8:04 pm

1 stop7h 44m

Denver Intl

Tue 11/4

5:45 pm-8:56 pm

Nonstop2h 11m

$219

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Tue 10/14

8:39 am-10:20 am

Nonstop2h 41m

Denver Intl

Tue 10/21

4:45 pm-10:15 pm

1 stop4h 30m

$219

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 10/1

10:48 am-2:42 pm

1 stop4h 54m

Denver Intl

Sun 10/5

5:52 pm-9:05 pm

Nonstop2h 13m

$239

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 10/1

10:48 am-2:42 pm

1 stop4h 54m

Denver Intl

Sat 10/4

5:52 pm-9:05 pm

Nonstop2h 13m

$239

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Sat 10/4

3:56 pm-8:19 pm

1 stop5h 23m

Denver Intl

Wed 10/8

4:15 pm-10:15 pm

1 stop5h 00m

$239

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Sat 10/11

3:56 pm-8:19 pm

1 stop5h 23m

Denver Intl

Tue 10/14

4:45 pm-10:15 pm

1 stop4h 30m

$269

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Mon 10/27

5:18 pm-11:15 pm

1 stop6h 57m

Denver Intl

Fri 10/31

5:45 pm-8:56 pm

Nonstop2h 11m

$277

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Mon 10/6

11:59 am-1:15 pm

Nonstop2h 16m

$80

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 14 results
1
2

Best time to book a flight from Peoria to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Peoria 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 Peoria to Denver

How far ahead should I book a flight from Peoria, Illinois to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Peoria to Denver. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Peoria, Illinois to Denver, you should look to book at least 54 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Peoria, Illinois to Denver?

Currently, October is the cheapest month in which you can book a flight from Peoria, Illinois to Denver (average of $197). Flying from Peoria, Illinois 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 PIA to DEN?

Find hourly flight availability from Peoria 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 September 17, 2025.

It’s optimal to fly from Peoria, Illinois to Denver in the afternoon. By choosing this option you can save up to 66% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from Peoria, Illinois 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 September 17, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Allegiant Air from Peoria to Denver. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Allegiant Air
7.2
Good
699 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

Related info for your journey

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

  • What airports do I use to fly from Peoria to Denver?

    You will need to book a flight from Greater Peoria to Denver Intl if you want to fly from Peoria to Denver. At least 3 different airlines have flights from Greater Peoria (PIA) to Denver Intl (DEN) on a regular basis. There is 1 flight to Denver from the Peoria airport per day. If you manage to book one that is nonstop, then you can expect the flight time from PIA to DEN to be around 2h 16m.

  • How popular is this Peoria, Illinois to Denver flight route?

    Within the past month, 12 users have taken a look at flights from Greater Peoria to Denver Intl.

  • How long is the flight from Peoria, Illinois to Denver?

    Airlines like Allegiant Air and United Airlines fly from Peoria, Illinois to Denver in about 2h 16m. The time it takes to get you to your destination is usually consistent. The distance between Peoria, Illinois and Denver is about 790 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Peoria, Illinois to Denver round-trip?

    Flying on Allegiant Air is currently your cheapest option to Denver, with prices starting at $81. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $219 and $228, respectively. These flights start at 66% lower than the current average price 3 months from now.

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

    No one likes to see their flight delayed. When booking a flight from Peoria, Illinois to Denver consider choosing Allegiant Air (94%), SkyWest Airlines (81%) or United Airlines (81%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Peoria, Illinois to Denver?

    Looking for the cheapest flight from Peoria, Illinois to Denver? While on average our users pay $282, our data indicates the cheapest price to be $78. The most popular route (Greater Peoria - Denver Intl), is priced around $129.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Peoria 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 Peoria, Illinois to Denver?

    Currently, October is the cheapest month in which you can book a flight from Peoria, Illinois to Denver (average of $197). Flying from Peoria, Illinois 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
Black Hawk
Westminster
Golden
Winter Park
Lakewood
Broomfield
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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Alternative routes for Peoria to Denver

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Top 3 airlines flying from Peoria to Denver

Discover the top 3 airlines that operate flights from Peoria 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$81Average$143FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$219Average$361FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$228Average$308FlexibilityNo cancel feeOn-time71%

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