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$331+ Cheap flights from Ontario to Peoria, IL (ONT - PIA)

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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIA
Nov 23 — Nov 301
Sun 11/23
Sun 11/30
1 adult, Economy
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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 October 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$339
(United Airlines)

One-way from

$331
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$539
Provider with most accurate pricing for Ontario-Greater Peoria flight deals.
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Provider most trusted by Cheapflights users for Ontario-Greater Peoria flights.
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From Ontario to Greater Peoria
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One-way flight from Ontario to Greater Peoria
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 24, 2025.

This United Airlines deal was found by Cheapflights users on 10/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/191:33 pmONT - PIA
1 stop5h 23mUnited Airlines
Sat 11/225:23 pmPIA - ONT
1 stop7h 08mUnited Airlines
Deal found 10/22$379
This Trip.com deal was found by Cheapflights users on 10/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:53 amONT - PIA
1 stop12h 33mMultiple Airlines
Mon 11/39:59 amPIA - ONT
2 stops13h 58mMultiple Airlines
Deal found 10/22$387
This United Airlines deal was found by Cheapflights users on 10/23. 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 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 10/23$404
This United Airlines deal was found by Cheapflights users on 10/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:32 pmONT - PIA
1 stop5h 24mUnited Airlines
Wed 11/123:30 pmPIA - ONT
1 stop9h 01mUnited Airlines
Deal found 10/23$429
This American Airlines deal was found by Cheapflights users on 10/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:51 pmONT - PIA
1 stop6h 24mAmerican Airlines
Mon 10/274:38 pmPIA - ONT
1 stop7h 40mAmerican Airlines
Deal found 10/22$499

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 October 24, 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

Wed 11/19

1:33 pm-8:56 pm

1 stop5h 23m

Greater Peoria

Sat 11/22

5:23 pm-10:31 pm

1 stop7h 08m

$379

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 4/15

12:55 pm-8:31 pm

1 stop5h 36m

Greater Peoria

Sat 4/18

11:31 am-5:46 pm

2 stops8h 15m

$384

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 4/15

7:00 am-4:31 pm

1 stop7h 31m

Greater Peoria

Sat 4/18

5:20 pm-10:26 pm

1 stop7h 06m

$404

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 11/26

1:29 pm-8:56 pm

1 stop5h 27m

Greater Peoria

Thu 11/27

8:43 am-5:34 pm

2 stops10h 51m

$409

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 12/6

1:34 pm-8:56 pm

1 stop5h 22m

Greater Peoria

Sat 12/13

1:15 pm-10:49 pm

2 stops11h 34m

$409

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Tue 12/23

5:05 am-8:47 pm

1 stop13h 42m

$331

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 12/24

5:05 am-8:47 pm

1 stop13h 42m

$331

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 12/18

5:05 am-8:47 pm

1 stop13h 42m

$349

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 11/12

5:05 am-9:31 pm

2 stops14h 26m

$363

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sun 12/21

11:59 pm-4:43 pm

1 stop14h 44m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 15 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Peoria, Illinois flight deals on Cheapflights vs. FlightHub >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 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 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 October 24, 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
8,995 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

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
8,995 reviews
United Airlines
7.4
Good
8,995 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

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
11,032 reviews
United Airlines
7.4
Good
8,995 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

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 23m. United 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.

  • 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

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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 October 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$530FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$319Average$493FlexibilityNo cancel feeOn-time69%

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