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Peoria

$390+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIA
Feb 10 — Feb 171
Tue 2/10
Tue 2/17
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 January 11, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$399
(United Airlines)

One-way from

$390
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$328
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
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Highest demand for flights based on searches. 15% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 11, 2026.

This United Airlines deal was found by Cheapflights users on 1/9. 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 5/137:00 amONT - PIA
1 stop7h 44mUnited Airlines
Wed 5/202:50 pmPIA - ONT
1 stop9h 36mUnited Airlines
Deal found 1/9$399
This United Airlines deal was found by Cheapflights users on 1/8. 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 2/36:00 amONT - PIA
2 stops8h 43mUnited Airlines
Sat 2/78:35 amPIA - ONT
1 stop6h 12mUnited Airlines
Deal found 1/8$404
This United Airlines deal was found by Cheapflights users on 1/9. 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 1/246:00 amONT - PIA
2 stops13h 39mUnited Airlines
Fri 1/303:00 pmPIA - ONT
2 stops9h 53mUnited Airlines
Deal found 1/9$435
This American Airlines deal was found by Cheapflights users on 1/10. 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 1/1511:59 pmONT - PIA
1 stop8h 40mAmerican Airlines
Thu 1/223:55 pmPIA - ONT
1 stop8h 53mAmerican Airlines
Deal found 1/10$484
This United Airlines deal was found by Cheapflights users on 1/10. 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 1/156:00 amONT - PIA
2 stops13h 39mUnited Airlines
Thu 1/228:35 amPIA - ONT
1 stop6h 12mUnited Airlines
Deal found 1/10$489
This United Airlines deal was found by Cheapflights users on 1/10. 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.
Sun 2/81:24 pmONT - PIA
1 stop5h 23mUnited Airlines
Sun 2/151:25 pmPIA - ONT
2 stops11h 32mUnited Airlines
Deal found 1/10$509
This United Airlines deal was found by Cheapflights users on 1/10. 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 1/131:24 pmONT - PIA
1 stop5h 23mUnited Airlines
Sun 1/258:35 amPIA - ONT
1 stop6h 12mUnited Airlines
Deal found 1/10$515

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 January 11, 2026.
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

Tue 2/3

6:00 am-4:43 pm

2 stops8h 43m

Greater Peoria

Sat 2/7

8:35 am-12:47 pm

1 stop6h 12m

$404

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Thu 1/15

6:00 am-9:39 pm

2 stops13h 39m

Greater Peoria

Thu 1/22

8:35 am-12:47 pm

1 stop6h 12m

$489

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sun 2/8

1:24 pm-8:47 pm

1 stop5h 23m

Greater Peoria

Sun 2/15

1:25 pm-10:57 pm

2 stops11h 32m

$509

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Tue 1/13

1:24 pm-8:47 pm

1 stop5h 23m

Greater Peoria

Sun 1/25

8:35 am-12:47 pm

1 stop6h 12m

$515

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Mon 2/16

6:37 pm-10:11 am

2 stops13h 34m

$390

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sun 2/15

5:00 am-5:10 pm

2 stops10h 10m

$390

OntarioPeoria

ONT - PIA

ONTPIA

Ontario

Sat 2/21

5:00 am-4:50 pm

2 stops9h 50m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

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 January.
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 January 11, 2026.
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
9,145 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

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
9,145 reviews
United Airlines
7.4
Good
9,145 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

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
11,102 reviews
United Airlines
7.4
Good
9,145 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

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 8h 43m. United Airlines provides one of the quickest options available for as low as $404. There are 1590 mi between Ontario and Peoria, Illinois.

  • 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 $358 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 January 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$503FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$358Average$493FlexibilityNo cancel feeOn-time69%

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