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$273+ Cheap flights from Peoria, IL to Ontario (PIA - ONT)

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — ONT
May 31 — Jun 71
Sun 5/31
Sun 6/7
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 May 1, 2026.

This United Airlines deal was found by Cheapflights users on 4/27. 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 5/125:30 pm
PIA
-
ONT
1 stop7h 05m
United Airlines
Sat 5/161:40 pm
ONT
-
PIA
1 stop5h 39m
United Airlines
Deal found 4/27$419
This American Airlines deal was found by Cheapflights users on 4/27. 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 5/127:00 am
PIA
-
ONT
2 stops11h 22m
American Airlines
Sat 5/169:24 am
ONT
-
PIA
2 stops12h 13m
American Airlines
Deal found 4/27$429
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/24:20 pm
PIA
-
ONT
1 stop8h 16m
American Airlines
Wed 6/1012:40 pm
ONT
-
PIA
1 stop8h 58m
American Airlines
Deal found 4/30$440
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/155:40 pm
PIA
-
ONT
1 stop7h 00m
American Airlines
Tue 5/192:08 pm
ONT
-
PIA
1 stop7h 05m
American Airlines
Deal found 4/30$464
This United Airlines deal was found by Cheapflights users on 4/30. 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 7/165:33 pm
PIA
-
ONT
1 stop7h 18m
United Airlines
Tue 7/216:30 am
ONT
-
PIA
1 stop8h 28m
United Airlines
Deal found 4/30$514
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/195:30 pm
PIA
-
ONT
1 stop7h 05m
United Airlines
Sun 5/241:18 pm
ONT
-
PIA
1 stop5h 43m
United Airlines
Deal found 4/30$540
This United Airlines deal was found by Cheapflights users on 4/27. 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 5/275:33 pm
PIA
-
ONT
1 stop7h 18m
United Airlines
Tue 6/95:45 am
ONT
-
PIA
2 stops11h 41m
United Airlines
Deal found 4/27$555

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 May 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$419
(United Airlines)

One-way from

$377
(United Airlines)

Popular in

July

Cheapest in

March

Average price

$538
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
One-way flight from Greater Peoria to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 May 1, 2026.
Use the filters below to find and compare flights from Peoria to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Thu 7/16

5:33 pm-10:51 pm

1 stop7h 18m

Ontario

Tue 7/21

6:30 am-4:58 pm

1 stop8h 28m

$514

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 5/12

8:30 am-8:36 pm

2 stops14h 06m

Ontario

Sat 5/16

6:00 am-9:19 pm

2 stops13h 19m

$529

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Wed 5/27

5:33 pm-10:51 pm

1 stop7h 18m

Ontario

Tue 6/9

5:45 am-7:26 pm

2 stops11h 41m

$555

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Wed 6/3

5:33 pm-10:46 pm

1 stop7h 13m

Ontario

Sat 6/6

5:00 am-9:01 pm

1 stop14h 01m

$587

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 7/3

5:33 pm-10:51 pm

1 stop7h 18m

Ontario

Fri 7/10

6:30 am-4:58 pm

1 stop8h 28m

$593

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 5/16

1:35 pm-6:01 pm

1 stop6h 26m

Ontario

Wed 5/20

5:00 am-9:19 pm

1 stop14h 19m

$613

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 5/19

5:30 pm-10:35 pm

1 stop7h 05m

Ontario

Sat 5/30

6:30 am-7:26 pm

1 stop10h 56m

$658

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 9/18

1:21 pm-6:19 pm

1 stop6h 58m

Ontario

Mon 9/21

1:18 pm-12:22 am

2 stops9h 04m

$672

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Wed 7/22

1:21 pm-9:55 pm

2 stops10h 34m

Ontario

Sun 7/26

6:30 am-4:58 pm

1 stop8h 28m

$716
Cheapest one-way

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 9/1

6:00 am-6:47 pm

2 stops14h 47m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Peoria, Illinois-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Peoria, Illinois-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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

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 May 1, 2026.
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
9,678 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.6

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
9,678 reviews
United Airlines
7.4
Good
9,678 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.6

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
7.1
Good
11,687 reviews
United Airlines
7.4
Good
9,678 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Food

6.6

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 7h 18m. 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 $378. You may be able to fly from Peoria, Illinois to Ontario for 45% 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.

See more FAQs

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Alternative routes for Peoria to Ontario

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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 May 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$504FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$378Average$543FlexibilityNo cancel feeOn-time71%

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