HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Denver

$75+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — DEN
Jul 29 — Aug 51
Wed 7/29
Wed 8/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Peoria 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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Greater Peoria to Denver Intl are usually found in October or December, booked 55 days in advance, depart on a Friday or Monday and return on a Monday

Cheap 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 June 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2710:07 am
PIA
-
DEN
Nonstop2h 20m
Allegiant Air
Sun 9/272:26 pm
DEN
-
PIA
Nonstop2h 03m
Allegiant Air
Deal found 6/27$147
This Cheapflightsfares deal was found by Cheapflights users on 6/28. 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.
Thu 8/2010:07 am
PIA
-
DEN
Nonstop2h 19m
Allegiant Air
Thu 8/272:17 pm
DEN
-
PIA
Nonstop2h 07m
Allegiant Air
Deal found 6/28$151
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:07 am
PIA
-
DEN
Nonstop2h 19m
Allegiant Air
Thu 8/272:17 pm
DEN
-
PIA
Nonstop2h 07m
Allegiant Air
Deal found 6/26$152
This Cheapflightsfares deal was found by Cheapflights users on 6/27. 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.
Sun 9/2710:07 am
PIA
-
DEN
Nonstop2h 20m
Allegiant Air
Thu 10/110:20 am
DEN
-
PIA
Nonstop1h 59m
Allegiant Air
Deal found 6/27$156
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Sun 8/165:23 pm
PIA
-
DEN
Nonstop2h 25m
Allegiant Air
Thu 8/272:17 pm
DEN
-
PIA
Nonstop2h 07m
Allegiant Air
Deal found 6/24$164
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/165:23 pm
PIA
-
DEN
Nonstop2h 25m
Allegiant Air
Thu 8/202:17 pm
DEN
-
PIA
Nonstop2h 07m
Allegiant Air
Deal found 6/26$183
This Flightnetwork deal was found by Cheapflights users on 6/25. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:23 pm
PIA
-
DEN
Nonstop2h 25m
Allegiant Air
Sun 8/164:27 pm
DEN
-
PIA
Nonstop2h 10m
Allegiant Air
Deal found 6/25$184
This Cheapflightsfares deal was found by Cheapflights users on 6/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/25:18 pm
PIA
-
DEN
Nonstop2h 23m
Allegiant Air
Sun 8/164:27 pm
DEN
-
PIA
Nonstop2h 10m
Allegiant Air
Deal found 6/25$193

Find 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 June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$147
(Kiwi.com)

One-way from

$75
(Cheapflightsfares)

Popular in

February

Cheapest in

October

Average price

$365

Good round-trip deal

$319 or less

Good one-way deal

$343 or less
Provider with most accurate pricing for Greater Peoria-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greater Peoria-Denver Intl flights.
Search Deals
From Greater Peoria to Denver Intl
Search Deals
One-way flight from Greater Peoria to Denver Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Greater Peoria to Denver Intl.
Search Deals
Price to beat on a one-way flight from Greater Peoria to Denver Intl.
Search Deals

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 June 29, 2026.
Use the filters below to find and compare flights from Peoria to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Tue 7/28

5:43 pm-11:48 pm

1 stop7h 05m

Denver Intl

Tue 8/4

5:33 pm-9:01 pm

Nonstop2h 28m

$299

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 9/2

8:29 am-3:17 pm

1 stop7h 48m

Denver Intl

Tue 9/8

5:30 pm-8:50 pm

Nonstop2h 20m

$299
Quickest round-trip

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 8/19

8:45 am-10:26 am

Nonstop2h 41m

Denver Intl

Sat 8/22

5:30 pm-8:50 pm

Nonstop2h 20m

$349

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 9/23

8:45 am-10:26 am

Nonstop2h 41m

Denver Intl

Wed 9/30

5:25 pm-8:51 pm

Nonstop2h 26m

$349

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 7/22

8:45 am-10:24 am

Nonstop2h 39m

Denver Intl

Wed 7/29

5:33 pm-9:01 pm

Nonstop2h 28m

$369

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 8/12

8:29 am-3:17 pm

1 stop7h 48m

Denver Intl

Wed 8/19

5:30 pm-8:50 pm

Nonstop2h 20m

$379

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Tue 8/11

3:35 pm-9:44 pm

1 stop7h 09m

Denver Intl

Thu 8/20

5:30 pm-8:50 pm

Nonstop2h 20m

$379

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Wed 7/29

8:45 am-10:24 am

Nonstop2h 39m

Denver Intl

Sun 8/2

5:33 pm-9:01 pm

Nonstop2h 28m

$423
Cheapest one-way
Quickest one-way

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Sun 8/23

10:07 am-11:26 am

Nonstop2h 19m

$75

PeoriaDenver

PIA - DEN

PIADEN

Greater Peoria

Thu 7/30

6:58 pm-12:17 am

1 stop6h 19m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Peoria 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 Peoria to Denver in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Peoria, Illinois-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Peoria, Illinois-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Peoria, Illinois-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Peoria, Illinois-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 Peoria, Illinois-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 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?

To ensure you get the cheapest price possible for a flight from Peoria, Illinois to Denver, you should look to book at least 53 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 $223). Flying from Peoria, Illinois to Denver in February is currently the most expensive (average of $394). 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 June 29, 2026.

When flying from Peoria, Illinois to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 June 29, 2026.
Read reviews from past customers who have flown United Airlines,Allegiant Air, andAmerican Airlines 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
9,894 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
9,894 reviews
United Airlines
7.4
Good
9,894 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
7.3
Good
689 reviews
United Airlines
7.4
Good
9,894 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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
7.1
Good
11,770 reviews
United Airlines
7.4
Good
9,894 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Overall

7.4

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 19m.

  • 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 United Airlines fly from Peoria, Illinois to Denver in about 7h 05m. The time it takes to get you to your destination can typically vary by up to . The distance between Peoria, Illinois and Denver is about 790 mi.

  • 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 $51. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $223 and $228, respectively. These flights start at 84% lower than the current average price 3 months from now.

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

    $74 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $223 and $223, respectively.

  • 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 SkyWest Airlines (85%), United Airlines (85%) or Allegiant Air (63%) 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 $445, our data indicates the cheapest price to be $88. The most popular route (Greater Peoria - Denver Intl), is priced around $151.

  • 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 $223). Flying from Peoria, Illinois to Denver in February is currently the most expensive (average of $394). 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
Westminster
Centennial
Lakewood
Broomfield
Golden
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Glendale
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 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 June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$51Average$244FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$223Average$364FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$228Average$288FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.