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Ontario

$526+ Cheap flights from Champaign to Ontario (CMI - 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — ONT
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Champaign to Ontario

Cheapest flights from Champaign to Ontario
Explore the most affordable flight options available from Champaign to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. 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 2/172:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Tue 2/246:00 am
ONT
-
CMI
1 stop6h 24m
American Airlines
Deal found 1/27$526
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 2/182:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Mon 2/239:53 am
ONT
-
CMI
2 stops9h 51m
American Airlines
Deal found 1/27$579
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:00 am
CMI
-
ONT
1 stop8h 49m
American Airlines
Sat 3/710:56 am
ONT
-
CMI
1 stop7h 58m
American Airlines
Deal found 1/26$591
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:54 pm
CMI
-
ONT
1 stop9h 35m
American Airlines
Fri 3/1310:56 am
ONT
-
CMI
1 stop7h 58m
American Airlines
Deal found 1/26$614
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/242:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Mon 3/210:56 am
ONT
-
CMI
1 stop7h 58m
American Airlines
Deal found 1/26$620
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 2/182:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Sun 2/226:00 am
ONT
-
CMI
1 stop6h 24m
American Airlines
Deal found 1/27$624
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 2/187:00 am
CMI
-
ONT
1 stop8h 49m
American Airlines
Tue 2/246:00 am
ONT
-
CMI
1 stop6h 24m
American Airlines
Deal found 1/27$626
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/1712:05 pm
CMI
-
ONT
2 stops9h 04m
American Airlines
Thu 2/267:05 pm
ONT
-
CMI
2 stops11h 57m
American Airlines
Deal found 1/27$631
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 2/182:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Wed 2/257:05 pm
ONT
-
CMI
2 stops12h 16m
American Airlines
Deal found 1/27$632
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/1712:05 pm
CMI
-
ONT
2 stops9h 04m
American Airlines
Sat 2/2112:26 pm
ONT
-
CMI
2 stops7h 18m
American Airlines
Deal found 1/27$637
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/172:54 pm
CMI
-
ONT
1 stop9h 55m
American Airlines
Wed 2/256:00 am
ONT
-
CMI
1 stop6h 24m
American Airlines
Deal found 1/27$643

Find flight deals from Champaign to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Champaign (CMI) 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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$526
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$481
Provider with most accurate pricing for Champaign University-Willard-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Champaign University-Willard-Ontario flights.
Search Deals
From Champaign University-Willard to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Champaign 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 January 28, 2026.
Use the filters below to find and compare flights from Champaign to Ontario that are best for you.

Fly from

Champaign

Fly to

Ontario

Route

Depart

Return

Price

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Wed 2/18

9:53 am-6:15 pm

2 stops10h 22m

Ontario

Mon 2/23

12:18 pm-9:44 pm

2 stops7h 26m

$584

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Wed 2/18

7:00 am-4:22 pm

2 stops11h 22m

Ontario

Sun 2/22

7:05 pm-9:12 am

2 stops12h 07m

$584

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Sat 2/28

7:00 am-1:49 pm

1 stop8h 49m

Ontario

Sat 3/7

10:56 am-8:54 pm

1 stop7h 58m

$591

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Thu 3/5

2:54 pm-10:29 pm

1 stop9h 35m

Ontario

Fri 3/13

10:56 am-8:54 pm

1 stop7h 58m

$614

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 2/24

2:54 pm-10:49 pm

1 stop9h 55m

Ontario

Mon 3/2

10:56 am-8:54 pm

1 stop7h 58m

$620

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 2/10

3:45 pm-10:48 pm

1 stop9h 03m

Ontario

Tue 2/17

6:00 am-2:24 pm

1 stop6h 24m

$626

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 2/17

2:54 pm-10:49 pm

1 stop9h 55m

Ontario

Thu 2/26

7:05 pm-9:02 am

2 stops11h 57m

$626

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 2/10

3:45 pm-10:48 pm

1 stop9h 03m

Ontario

Wed 2/18

6:00 am-2:24 pm

1 stop6h 24m

$626

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Sat 2/14

7:00 am-1:49 pm

1 stop8h 49m

Ontario

Sat 2/21

6:00 am-2:24 pm

1 stop6h 24m

$626

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 2/17

2:54 pm-10:49 pm

1 stop9h 55m

Ontario

Tue 2/24

6:00 am-2:24 pm

1 stop6h 24m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 11 results
1
2
  • Most accurate provider: When it comes to deals on Champaign-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Champaign-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Champaign-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Champaign-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 Champaign-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 Champaign to Ontario

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

What is the cheapest month to book a flight from Champaign to Ontario?

Currently, May is the cheapest month in which you can book a flight from Champaign to Ontario (average of $132). Flying from Champaign to Ontario in June is currently the most expensive (average of $319). 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.

Related info for your journey

Find useful and relevant information for your journey from Champaign 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 Champaign to Ontario?

    A quick flight from Champaign to Ontario can take about 10h 22m. American Airlines provides one of the quickest options available for as low as $584. There are 1659 mi between Champaign and Ontario.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Champaign to Ontario (average of $132). Flying from Champaign to Ontario in June is currently the most expensive (average of $319). 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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See prices for flight routes from nearby airports that may be better suited for you.
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