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$274+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$294
(American Airlines)

One-way from

$274
(United Airlines)

Popular in

August

Cheapest in

May

Average price

$391
From Greater Peoria to Ontario
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One-way flight from Greater Peoria to Ontario
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/286:50 amPIA - ONT
1 stop6h 45mAmerican Airlines
Wed 11/510:31 amONT - PIA
2 stops11h 23mAmerican Airlines
Deal found 6/11$294
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/295:19 pmPIA - ONT
1 stop7h 11mUnited Airlines
Wed 9/37:00 amONT - PIA
1 stop6h 18mUnited Airlines
Deal found 6/11$379

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 June 12, 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

Tue 10/28

6:50 am-11:35 am

1 stop6h 45m

Ontario

Wed 11/5

10:31 am-11:54 pm

2 stops11h 23m

$294

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 8/29

3:55 pm-10:30 pm

1 stop8h 35m

Ontario

Tue 9/2

7:00 am-4:43 pm

1 stop7h 43m

$379

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Fri 7/4

6:45 am-5:38 pm

2 stops12h 53m

$274

PeoriaOntario

PIA - ONT

PIAONT

Greater Peoria

Sun 7/6

6:24 pm-11:59 pm

2 stops7h 35m

$559

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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, August is the cheapest month in which you can book a flight from Peoria, Illinois to Ontario (average of $246). Flying from Peoria, Illinois to Ontario in March is currently the most expensive (average of $328). 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with United Airlines and American Airlines from Peoria to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,790 reviews

Food

6.6

Entertainment

7.0

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

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
8,790 reviews
United Airlines
7.4
Good
8,790 reviews

Food

6.6

Entertainment

7.0

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

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
10,000 reviews
United Airlines
7.4
Good
8,790 reviews

Food

6.6

Entertainment

7.0

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

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.

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

    Currently priced at $294, American Airlines will fly you from Peoria, Illinois to Ontario and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $379. You may be able to fly from Peoria, Illinois to Ontario for 47% 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, August is the cheapest month in which you can book a flight from Peoria, Illinois to Ontario (average of $246). Flying from Peoria, Illinois to Ontario in March is currently the most expensive (average of $328). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$391FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$447Average$678FlexibilityNo cancel feeOn-time71%

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