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$485+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$485
(American Airlines)

Popular in

October

Cheapest in

April

Average price

$746
Provider with most accurate pricing for Champaign University-Willard-Ontario flight deals.
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Provider most trusted by Cheapflights users for Champaign University-Willard-Ontario flights.
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From Champaign University-Willard to Ontario
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Highest demand for flights based on searches. 6% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:45 amCMI - ONT
1 stop7h 08mAmerican Airlines
Thu 12/46:00 amONT - CMI
1 stop6h 45mAmerican Airlines
Deal found 10/29$485
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 12/186:52 amCMI - ONT
1 stop9h 00mAmerican Airlines
Wed 12/2412:45 pmONT - CMI
1 stop5h 52mAmerican Airlines
Deal found 10/30$644
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.
Wed 12/176:52 amCMI - ONT
1 stop9h 03mAmerican Airlines
Thu 12/2512:45 pmONT - CMI
1 stop5h 52mAmerican Airlines
Deal found 10/30$653
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:37 amCMI - ONT
1 stop7h 16mAmerican Airlines
Sun 1/49:53 amONT - CMI
2 stops9h 37mAmerican Airlines
Deal found 10/29$673
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 12/186:52 amCMI - ONT
1 stop9h 00mAmerican Airlines
Thu 12/2512:45 pmONT - CMI
1 stop5h 52mAmerican Airlines
Deal found 10/30$674
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 12/186:52 amCMI - ONT
1 stop7h 01mAmerican Airlines
Sat 12/276:10 amONT - CMI
1 stop6h 29mAmerican Airlines
Deal found 10/30$680

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 October 30, 2025.
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

Thu 11/27

6:45 am-11:53 am

1 stop7h 08m

Ontario

Thu 12/4

6:00 am-2:45 pm

1 stop6h 45m

$485

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 3/31

1:16 pm-9:40 pm

2 stops10h 24m

Ontario

Sat 4/4

6:46 am-2:24 pm

1 stop5h 38m

$566

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Thu 12/18

6:52 am-1:52 pm

1 stop9h 00m

Ontario

Wed 12/24

12:45 pm-8:37 pm

1 stop5h 52m

$644

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Wed 12/17

6:52 am-1:55 pm

1 stop9h 03m

Ontario

Fri 12/26

12:45 pm-8:37 pm

1 stop5h 52m

$653

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Wed 12/17

6:52 am-1:55 pm

1 stop9h 03m

Ontario

Thu 12/25

12:45 pm-8:37 pm

1 stop5h 52m

$653

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Tue 12/30

6:37 am-11:53 am

1 stop7h 16m

Ontario

Sun 1/4

9:53 am-9:30 pm

2 stops9h 37m

$673

ChampaignOntario

CMI - ONT

CMIONT

Champaign University-Willard

Thu 12/18

6:52 am-11:53 am

1 stop7h 01m

Ontario

Fri 12/26

12:45 pm-8:37 pm

1 stop5h 52m

$674

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Compare providers for flights from Champaign 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 Champaign to Ontario in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 Champaign-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Champaign-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 March is currently the most expensive (average of $357). 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 October 30, 2025.
See what other customers who have flown with American Airlines from Champaign 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.
American Airlines
7.2
Good
11,034 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.
American Airlines
7.2
Good
11,034 reviews
American Airlines
7.2
Good
11,034 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.

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 7h 08m. American Airlines provides one of the quickest options available for as low as $485. There are 1659 mi between Champaign and Ontario.

  • What is the cheapest airline to fly from Champaign to Ontario round-trip?

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $458.

  • 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 March is currently the most expensive (average of $357). 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 airline flying from Champaign to Ontario

Discover the top airline that operate flights from Champaign 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$458Average$733FlexibilityNo cancel feeOn-time71%

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