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$1,070+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — ONT
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 December 15, 2025.

This American Airlines deal was found by Cheapflights users on 12/13. 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 12/3011:33 amCMI - ONT
2 stops8h 55mAmerican Airlines
Sun 1/46:10 amONT - CMI
1 stop6h 17mAmerican Airlines
Deal found 12/13$1,070

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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,070
(American Airlines)

Popular in

October

Cheapest in

April

Average price

$693
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.
Search Deals
From Champaign University-Willard to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 15, 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

Tue 12/30

11:33 am-6:28 pm

2 stops8h 55m

Ontario

Sun 1/4

6:10 am-2:27 pm

1 stop6h 17m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

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 December.
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 $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.

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 8h 55m. American Airlines provides one of the quickest options available for as low as $1,070. 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 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.

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