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Ontario

$204+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — ONT
Apr 11 — Apr 181
Sat 4/11
Sat 4/18
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 March 12, 2026.

This United Airlines deal was found by Cheapflights users on 3/11. 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 5/225:33 pm
PIA
-
ONT
1 stop7h 13m
United Airlines
Thu 5/281:18 pm
ONT
-
PIA
1 stop5h 43m
United Airlines
Deal found 3/11$349
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Fri 4/175:35 pm
PIA
-
ONT
1 stop6h 56m
United Airlines
Sun 4/196:49 pm
ONT
-
PIA
2 stops13h 13m
United Airlines
Deal found 3/9$354
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/148:50 am
PIA
-
ONT
1 stop5h 48m
United Airlines
Sat 4/187:00 am
ONT
-
PIA
1 stop7h 44m
United Airlines
Deal found 3/8$419
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/25:35 pm
PIA
-
ONT
1 stop6h 56m
United Airlines
Wed 4/81:34 pm
ONT
-
PIA
1 stop5h 45m
United Airlines
Deal found 3/10$462
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/305:30 pm
PIA
-
ONT
1 stop7h 05m
United Airlines
Sun 5/37:00 am
ONT
-
PIA
1 stop7h 50m
United Airlines
Deal found 3/12$464

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 March 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(United Airlines)

One-way from

$204
(eDestinos)

Popular in

May

Cheapest in

August

Average price

$458
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 ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 12, 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

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 4/17

10:40 am-10:45 pm

2 stops14h 05m

Ontario

Sun 4/19

6:49 pm-10:02 am

2 stops13h 13m

$359
Quickest round-trip

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 4/14

8:50 am-12:38 pm

1 stop5h 48m

Ontario

Sat 4/18

7:00 am-4:44 pm

1 stop7h 44m

$419

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Thu 7/16

5:33 pm-10:46 pm

1 stop7h 13m

Ontario

Sat 7/25

6:30 am-4:58 pm

1 stop8h 28m

$439

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 4/21

5:35 pm-10:31 pm

1 stop6h 56m

Ontario

Sat 4/25

7:00 am-4:44 pm

1 stop7h 44m

$439

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 5/16

1:35 pm-9:58 pm

2 stops10h 23m

Ontario

Sat 5/23

1:18 pm-9:01 pm

1 stop5h 43m

$444
Cheapest one-way

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 3/24

2:17 pm-9:03 pm

2 stops32h 46m

$235

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Mon 3/30

7:28 pm-10:26 pm

1 stop28h 58m

$377
Quickest one-way

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Tue 3/24

5:22 pm-10:49 pm

1 stop7h 27m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sat 4/4

6:30 am-10:31 pm

1 stop18h 01m

$399

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Wed 3/25

6:10 am-1:48 pm

1 stop9h 38m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 13 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 March.
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

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 $297). 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 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 March 12, 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
9,418 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

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
9,418 reviews
United Airlines
7.4
Good
9,418 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

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
11,435 reviews
United Airlines
7.4
Good
9,418 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

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 14h 05m. 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 $388.

  • 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 $297). 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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$450FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$388Average$576FlexibilityNo cancel feeOn-time71%

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