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$360+ Cheap flights from Peoria, IL to Ontario (PIA - ONT)

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — ONT
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Peoria to Ontario

Cheapest flights from Peoria to Ontario
Explore the most affordable flight options available from Peoria to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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 12/185:19 pmPIA - ONT
1 stop7h 06mUnited Airlines
Sat 12/205:05 amONT - PIA
2 stops9h 38mUnited Airlines
Deal found 12/14$600
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/203:30 pmPIA - ONT
1 stop8h 55mUnited Airlines
Sat 12/275:05 amONT - PIA
2 stops9h 38mUnited Airlines
Deal found 12/15$676
This United Airlines deal was found by Cheapflights users on 12/13. 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 12/205:19 pmPIA - ONT
1 stop7h 06mUnited Airlines
Sun 12/216:04 amONT - PIA
2 stops13h 35mUnited Airlines
Deal found 12/13$757
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Mon 12/223:30 pmPIA - ONT
1 stop8h 55mUnited Airlines
Thu 1/18:11 amONT - PIA
2 stops10h 36mUnited Airlines
Deal found 12/15$765
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/248:35 amPIA - ONT
1 stop6h 03mUnited Airlines
Mon 12/295:05 amONT - PIA
1 stop13h 42mUnited Airlines
Deal found 12/14$789
This United Airlines deal was found by Cheapflights users on 12/13. 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 12/275:19 pmPIA - ONT
1 stop7h 06mUnited Airlines
Tue 12/305:05 amONT - PIA
2 stops9h 38mUnited Airlines
Deal found 12/13$810

Find flight deals from Peoria to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Peoria (PIA) to Ontario (ONT). 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$360
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$581
Provider with most accurate pricing for Greater Peoria-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greater Peoria-Ontario flights.
Search Deals
From Greater Peoria to Ontario
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Peoria to Ontario 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 December 15, 2025.
Use the filters below to find and compare flights from Peoria to Ontario that are best for you.

Fly from

Peoria

Fly to

Ontario

Route

Depart

Return

Price

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Mon 6/1

5:20 pm-10:26 pm

1 stop7h 06m

Ontario

Sat 6/6

7:00 am-4:31 pm

1 stop7h 31m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 3/14

5:25 pm-10:25 pm

1 stop7h 00m

Ontario

Wed 3/18

1:50 pm-9:06 pm

1 stop5h 16m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 1/20

8:35 am-12:47 pm

1 stop6h 12m

Ontario

Sat 1/24

1:24 pm-8:47 pm

1 stop5h 23m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 3/7

5:25 pm-10:25 pm

1 stop7h 00m

Ontario

Tue 3/24

11:59 pm-10:03 am

1 stop8h 04m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 1/3

5:19 pm-10:25 pm

1 stop7h 06m

Ontario

Fri 1/9

1:24 pm-8:47 pm

1 stop5h 23m

$400

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 1/23

3:00 pm-10:53 pm

2 stops9h 53m

Ontario

Mon 1/26

1:24 pm-8:47 pm

1 stop5h 23m

$404

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Thu 2/5

1:24 pm-10:53 pm

2 stops11h 29m

Ontario

Sat 2/7

1:24 pm-8:47 pm

1 stop5h 23m

$404

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 1/24

6:30 am-12:47 pm

2 stops8h 17m

Ontario

Wed 1/28

1:24 pm-8:47 pm

1 stop5h 23m

$404

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Wed 1/14

8:35 am-5:43 pm

2 stops11h 08m

Ontario

Wed 1/21

1:24 pm-8:47 pm

1 stop5h 23m

$404

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Compare providers for flights from Peoria to Ontario

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

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

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

Currently, July is the cheapest month in which you can book a flight from Peoria, Illinois to Ontario (average of $121). Flying from Peoria, Illinois to Ontario in March is currently the most expensive (average of $311). 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.

How much does it cost to fly round-trip from Peoria, Illinois to Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 15, 2025.
See what other customers who have flown with United Airlines and American Airlines from Peoria to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
American Airlines
7.2
Good
11,052 reviews
United Airlines
7.4
Good
9,092 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.

Related info for your journey

Find useful and relevant information for your journey from Peoria to Ontario. 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 Peoria, Illinois to Ontario?

    Departing from Peoria, Illinois to Ontario will take you 6h 12m. There are 1590 mi between Peoria, Illinois and Ontario.

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

    Currently priced at $288, United Airlines will fly you from Peoria, Illinois to Ontario and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $418. You may be able to fly from Peoria, Illinois to Ontario for 46% less than the average price by searching for these airlines.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Peoria, Illinois to Ontario (average of $121). Flying from Peoria, Illinois to Ontario in March is currently the most expensive (average of $311). 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 Peoria to Ontario

Discover the top 2 airlines that operate flights from Peoria to Ontario. 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$490FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$418Average$607FlexibilityNo cancel feeOn-time71%

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