$499+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — ONT
Nov 30 — Dec 71
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Peoria to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Peoria to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Peoria to OntarioExplore 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 October 31, 2026.
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 October 31, 2026.
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 12/3111:14 am -
2 stops10h 07m
Fri 1/15:44 am -
1 stop7h 52m
Deal found 10/30![American Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/148:41 am -
1 stop5h 52m
Wed 11/189:25 am -
2 stops11h 48m
Deal found 10/30![United Airlines logo]()
$574
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/118:40 am -
2 stops13h 58m
Mon 12/146:00 am -
2 stops12h 46m
Deal found 10/25![United Airlines logo]()
$589
This United Airlines deal was found by Cheapflights users on 10/27. 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 12/1610:45 am -
2 stops13h 14m
Mon 1/186:37 pm -
2 stops13h 28m
Deal found 10/27![United Airlines logo]()
$698
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/1110:43 am -
2 stops12h 08m
Sun 11/157:00 am -
1 stop7h 47m
Deal found 10/27![United Airlines logo]()
$738
This American Airlines deal was found by Cheapflights users on 10/30. 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.
Thu 12/3111:14 am -
2 stops10h 07m
Sun 1/311:59 pm -
1 stop8h 43m
Deal found 10/30![American Airlines logo]()
$763
Best flights from Peoria to OntarioDiscover carefully curated flight deals from Peoria to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 31, 2026.
Discover carefully curated flight deals from Peoria to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 31, 2026.
This United Airlines deal was found by Cheapflights users on 10/28. 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 1/278:40 am -
1 stop6h 00m
Sat 1/307:00 am -
1 stop7h 59m
Deal found 10/28![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/25. 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 2/68:40 am -
1 stop6h 00m
Tue 2/91:42 pm -
1 stop5h 28m
Deal found 10/25![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/26. 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 1/68:40 am -
1 stop6h 00m
Sat 1/95:00 am -
2 stops9h 59m
Deal found 10/26![United Airlines logo]()
$504
Last-minute flights from Peoria to OntarioDiscover last-minute flight deals from Peoria to Ontario. Data last updated October 31, 2026 and is based on user searches.
Discover last-minute flight deals from Peoria to Ontario. Data last updated October 31, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/28. 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 11/18:41 am -
1 stop5h 52m
Sun 11/87:00 am -
1 stop7h 47m
Deal found 10/28![United Airlines logo]()
$894
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/18:41 am -
1 stop5h 52m
Tue 11/31:29 pm -
1 stop5h 37m
Deal found 10/29![United Airlines logo]()
$1,023
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/1110:43 am -
2 stops12h 08m
Sun 11/157:00 am -
1 stop7h 47m
Deal found 10/27![United Airlines logo]()
$738
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/148:41 am -
1 stop5h 52m
Wed 11/189:25 am -
2 stops11h 48m
Deal found 10/30![United Airlines logo]()
$574
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/208:41 am -
1 stop14h 10m
Sat 11/287:00 am -
1 stop7h 47m
Deal found 10/29![United Airlines logo]()
$901
One-way flights from Peoria to OntarioSearch for one-way flight options from Peoria to Ontario. Find affordable one-way fares based on user searches. Data last updated October 31, 2026.
Search for one-way flight options from Peoria to Ontario. Find affordable one-way fares based on user searches. Data last updated October 31, 2026.
This United Airlines deal was found by Cheapflights users on 10/26. 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 12/272:35 pm -
1 stop9h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![United Airlines logo]()
$629
This United Airlines deal was found by Cheapflights users on 10/26. 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 12/282:35 pm -
2 stops10h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![United Airlines logo]()
$634
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 October 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $469 (American Airlines) |
Popular in | August |
Cheapest in | January |
Average price | $438 |
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 7,457,451 searches. Data last updated October 31, 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
Cheapest round-trip
PeoriaOntario
PIA Greater Peoria - ONT Ontario
PIAONT
Greater Peoria
Wed 1/27
8:40 am-12:40 pm
1 stop6h 00m
Ontario
Sat 1/30
7:00 am-4:59 pm
1 stop7h 59m
$499
PeoriaOntario
PIA Greater Peoria - ONT Ontario
PIAONT
Greater Peoria
Sat 2/6
8:40 am-12:40 pm
1 stop6h 00m
Ontario
Tue 2/9
1:42 pm-9:10 pm
1 stop5h 28m
$499
PeoriaOntario
PIA Greater Peoria - ONT Ontario
PIAONT
Greater Peoria
Wed 1/6
8:40 am-12:40 pm
1 stop6h 00m
Ontario
Sat 1/9
5:00 am-4:59 pm
2 stops9h 59m
$504
Quickest round-trip
PeoriaOntario
PIA Greater Peoria - ONT Ontario
PIAONT
Greater Peoria
Mon 12/28
2:35 pm-10:31 pm
1 stop9h 56m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$629
PeoriaOntario
PIA Greater Peoria - ONT Ontario
PIAONT
Greater Peoria
Sun 12/27
2:35 pm-10:31 pm
1 stop9h 56m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$629
Sorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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.
PIA-ONT
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.
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 October 31, 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.
Food
6.7
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
Food
6.7
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
Food
6.7
Comfort
7.3
Overall
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Peoria
Popular flights
Alternative routes for Peoria to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Peoria to Ontario by cabin class
Find flights from Peoria to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 31, 2026.
Peoria and Ontario flights
Browse other Peoria and Ontario flight options. Last updated on October 31, 2026.
Other flights from Peoria
Browse through other flights departing from Peoria. Flights are based on user searches made on Cheapflights and were last updated on October 31, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated October 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$388 | Average$594 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$448 | Average$581 | FlexibilityNo cancel fee | On-time69% |