HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Peoria

$369+ Cheap flights from Ontario to Peoria, IL (ONT - PIA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIA
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Peoria 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.

Cheap flight deals from Ontario to Peoria

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Peoria (PIA). 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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$369
(American Airlines)

Popular in

November

Cheapest in

October

Average price

$911
Provider with most accurate pricing for Ontario-Greater Peoria flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Greater Peoria flights.
Search Deals
From Ontario to Greater Peoria
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Ontario to Peoria

Cheapest flights from Ontario to Peoria
Explore the most affordable flight options available from Ontario to Peoria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sat 12/63:04 pmONT - PIA
1 stop5h 55mAmerican Airlines
Fri 12/1210:48 amPIA - ONT
1 stop9h 29mAmerican Airlines
Deal found 11/6$369
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/31:34 pmONT - PIA
1 stop5h 22mUnited Airlines
Wed 12/108:40 amPIA - ONT
1 stop5h 52mUnited Airlines
Deal found 11/5$379
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 11/2211:59 pmONT - PIA
1 stop8h 16mAmerican Airlines
Tue 11/254:23 pmPIA - ONT
1 stop8h 00mAmerican Airlines
Deal found 11/5$404
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Sun 11/2311:59 pmONT - PIA
1 stop8h 16mAmerican Airlines
Thu 11/276:40 amPIA - ONT
2 stops10h 44mAmerican Airlines
Deal found 11/4$419
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Sat 11/2211:59 pmONT - PIA
1 stop8h 16mAmerican Airlines
Thu 11/276:40 amPIA - ONT
2 stops10h 44mAmerican Airlines
Deal found 11/4$464
This American Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/257:00 amONT - PIA
1 stop6h 48mAmerican Airlines
Thu 11/276:40 amPIA - ONT
2 stops10h 44mAmerican Airlines
Deal found 11/4$485
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/197:00 amONT - PIA
1 stop7h 40mUnited Airlines
Sat 11/223:30 pmPIA - ONT
1 stop9h 01mUnited Airlines
Deal found 11/5$494
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/261:29 pmONT - PIA
1 stop5h 27mUnited Airlines
Thu 11/2710:51 amPIA - ONT
1 stop6h 30mUnited Airlines
Deal found 11/6$519

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Peoria 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 November 6, 2025.
Use the filters below to find and compare flights from Ontario to Peoria that are best for you.

Fly from

Ontario

Fly to

Peoria

Route

Depart

Return

Price

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 12/6

12:55 pm-11:53 pm

2 stops8h 58m

Greater Peoria

Fri 12/12

4:19 pm-10:28 pm

1 stop8h 09m

$374

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 12/3

1:34 pm-8:56 pm

1 stop5h 22m

Greater Peoria

Wed 12/10

8:40 am-12:32 pm

1 stop5h 52m

$379

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 11/22

11:59 pm-10:15 am

1 stop8h 16m

Greater Peoria

Tue 11/25

4:23 pm-10:23 pm

1 stop8h 00m

$404

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Mon 11/24

3:19 pm-11:09 pm

1 stop5h 50m

Greater Peoria

Thu 11/27

6:40 am-3:24 pm

2 stops10h 44m

$464

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 11/22

11:59 pm-10:15 am

1 stop8h 16m

Greater Peoria

Thu 11/27

6:40 am-3:24 pm

2 stops10h 44m

$464

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Tue 11/25

7:00 am-3:48 pm

1 stop6h 48m

Greater Peoria

Thu 11/27

6:40 am-3:24 pm

2 stops10h 44m

$485

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 11/19

7:00 am-4:40 pm

1 stop7h 40m

Greater Peoria

Sat 11/22

3:30 pm-10:31 pm

1 stop9h 01m

$494

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 11/26

1:29 pm-8:56 pm

1 stop5h 27m

Greater Peoria

Thu 11/27

10:51 am-3:21 pm

1 stop6h 30m

$519

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Tue 11/25

7:00 am-4:40 pm

1 stop7h 40m

Greater Peoria

Thu 11/27

10:51 am-3:21 pm

1 stop6h 30m

$519

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 11/26

7:00 am-4:40 pm

1 stop7h 40m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 11 results
1
2

Compare providers for flights from Ontario to Peoria

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 Ontario to Peoria in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 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 Ontario-Peoria, Illinois flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Peoria, Illinois flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Peoria, Illinois flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Peoria, Illinois flights, Cheapflights users trust eDreams the most. eDreams 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 Ontario-Peoria, Illinois 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 Ontario to Peoria

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

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Peoria, Illinois (average of $173). Flying from Ontario to Peoria, Illinois in June is currently the most expensive (average of $350). 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.

Reviews of airlines servicing Peoria

Get insights into the airlines that provide service to Peoria. 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 Peoria. Reviews last updated November 6, 2025.
Get a feel of what it's like to fly with United Airlines and American Airlines from Ontario to Peoria by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
11,040 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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

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

    A quick flight from Ontario to Peoria, Illinois can take about 5h 22m. American Airlines provides one of the quickest options available for as low as $379. There are 1590 mi between Ontario and Peoria, Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on American Airlines is currently your cheapest option to Peoria, Illinois, with prices starting at $288. Another option worth looking into is United Airlines, starting at $319 round trip. Users have found that American Airlines is 47% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Peoria, Illinois (average of $173). Flying from Ontario to Peoria, Illinois in June is currently the most expensive (average of $350). 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

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.

Alternative routes for Ontario to Peoria

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to O'Hare Intl flights
Los Angeles to O'Hare Intl flights
Ontario to O'Hare Intl flights
Santa Ana to O'Hare Intl flights
Los Angeles to Midway flights
San Francisco to Midway flights
San Diego to O'Hare Intl flights
San Jose to O'Hare Intl flights
Sacramento to O'Hare Intl flights
Las Vegas to O'Hare Intl flights
Burbank to O'Hare Intl flights
Oakland to O'Hare Intl flights
San Francisco to St. Louis flights
San Diego to Midway flights
Santa Ana to Midway flights
Los Angeles to St. Louis flights
Las Vegas to Midway flights
Ontario to Midway flights
Ontario to St. Louis flights
Reno to O'Hare Intl flights
San Diego to St. Louis flights
Sacramento to Midway flights
Oakland to Midway flights
Palm Springs to O'Hare Intl flights
San Jose to Midway flights
Burbank to Midway flights
Las Vegas to St. Louis flights
Fresno to O'Hare Intl flights
San Jose to St. Louis flights
Santa Ana to St. Louis flights
Long Beach to O'Hare Intl flights
Burbank to St. Louis flights
Sacramento to St. Louis flights
Reno to Midway flights
San Francisco to Decatur flights
Oakland to St. Louis flights
Fresno to Midway flights
Monterey to O'Hare Intl flights
Los Angeles to Rockford flights
Santa Barbara to O'Hare Intl flights
Los Angeles to Moline flights
Santa Ana to Peoria flights
Santa Rosa to O'Hare Intl flights
Redding to O'Hare Intl flights
Long Beach to St. Louis flights
Ontario to Moline flights
Los Angeles to Peoria flights
Bakersfield to O'Hare Intl flights
San Luis Obispo to O'Hare Intl flights

Top 2 airlines flying from Ontario to Peoria

Discover the top 2 airlines that operate flights from Ontario to Peoria. 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$530FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$319Average$493FlexibilityNo cancel feeOn-time69%

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.