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Peoria

$339+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIA
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
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 August 7, 2025.

Round-trip from

$339
(American Airlines)

Popular in

March

Cheapest in

February

Average price

$403
From Ontario to Greater Peoria
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High demand for flights, 12% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 7, 2025.

This American Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 8/2111:59 pmONT - PIA
1 stop8h 45mAmerican Airlines
Mon 8/255:09 pmPIA - ONT
1 stop7h 39mAmerican Airlines
Deal found 8/6$339
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Fri 8/226:04 amONT - PIA
2 stops14h 11mUnited Airlines
Tue 8/263:55 pmPIA - ONT
1 stop8h 35mUnited Airlines
Deal found 8/7$344
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/41:15 pmONT - PIA
1 stop5h 57mUnited Airlines
Thu 9/113:55 pmPIA - ONT
1 stop8h 35mUnited Airlines
Deal found 8/5$379
This United Airlines deal was found by Cheapflights users on 8/5. 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 8/207:00 amONT - PIA
1 stop7h 43mUnited Airlines
Tue 8/268:45 amPIA - ONT
1 stop5h 47mUnited Airlines
Deal found 8/5$404
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Thu 9/257:02 amONT - PIA
1 stop7h 41mUnited Airlines
Mon 9/295:20 pmPIA - ONT
1 stop7h 10mUnited Airlines
Deal found 8/7$444
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 9/116:50 pmONT - PIA
2 stops13h 23mUnited Airlines
Sun 9/145:19 pmPIA - ONT
1 stop7h 11mUnited Airlines
Deal found 8/6$449
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 8/161:34 pmONT - PIA
1 stop5h 22mUnited Airlines
Tue 8/268:45 amPIA - ONT
1 stop5h 47mUnited Airlines
Deal found 8/6$469
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 8/215:10 amONT - PIA
2 stops9h 33mUnited Airlines
Mon 8/2510:49 amPIA - ONT
2 stops8h 40mUnited Airlines
Deal found 8/6$479
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Thu 8/147:00 amONT - PIA
1 stop7h 43mUnited Airlines
Mon 8/185:25 pmPIA - ONT
1 stop6h 41mUnited Airlines
Deal found 8/7$509

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 August 7, 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

Thu 8/21

11:59 pm-10:44 am

1 stop8h 45m

Greater Peoria

Mon 8/25

5:09 pm-10:48 pm

1 stop7h 39m

$339

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Fri 8/22

6:04 am-10:15 pm

2 stops14h 11m

Greater Peoria

Tue 8/26

3:55 pm-10:30 pm

1 stop8h 35m

$344

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 9/4

1:15 pm-9:12 pm

1 stop5h 57m

Greater Peoria

Thu 9/11

3:55 pm-10:30 pm

1 stop8h 35m

$379

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Wed 8/20

7:00 am-4:43 pm

1 stop7h 43m

Greater Peoria

Tue 8/26

8:45 am-12:32 pm

1 stop5h 47m

$404

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 9/25

7:02 am-4:43 pm

1 stop7h 41m

Greater Peoria

Mon 9/29

5:20 pm-10:30 pm

1 stop7h 10m

$444

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 9/11

6:50 pm-10:13 am

2 stops13h 23m

Greater Peoria

Sun 9/14

5:19 pm-10:30 pm

1 stop7h 11m

$449

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 8/21

1:15 pm-9:12 pm

1 stop5h 57m

Greater Peoria

Mon 8/25

5:19 pm-10:30 pm

1 stop7h 11m

$469

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Fri 8/29

6:38 pm-9:12 pm

1 stop24h 34m

$345

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Mon 9/1

7:00 am-10:13 am

1 stop25h 13m

$367

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 8/16

7:00 am-3:03 pm

1 stop6h 03m

$410

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 11 results
1
2

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 $318). Flying from Ontario to Peoria, Illinois in October is currently the most expensive (average of $424). 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 August 7, 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
8,916 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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.

  • 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 $339. Another option worth looking into is United Airlines, starting at $344 round trip. Users have found that American Airlines is 38% 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 $318). Flying from Ontario to Peoria, Illinois in October is currently the most expensive (average of $424). 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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Alternative routes for Ontario to Peoria

See prices for flight routes from nearby airports that may be better suited for you.
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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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$530FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$319Average$544FlexibilityNo cancel feeOn-time69%

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