CMI - ONT

$343 Find Cheap Flights from Champaign to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Champaign to Ontario departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Champaign to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Champaign to Ontario, as well as popular online travel agencies
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$464
United Airlines
Sat 8/22Wed 8/26
CMI - ONT • 1 stop
Cheapest one-way
$343
American Airlines
Tue 5/19
CMI - ONT • 2 stops
Top airlines
United Airlines
Cheapest • from $464 (round-trip)
American Airlines
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Champaign and Ontario. You'll need at least 1 connection.
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We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Champaign to Ontario (CMI-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Champaign to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Champaign to Ontario

Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
1:32 pm - 6:19 pm
CMI
-
ONT
6h 47m
1 stop
United Airlines Logo
7:13 pm - 8:54 am
ONT
-
CMI
11h 41m
2 stops
$464United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
1:32 pm - 10:58 pm
CMI
-
ONT
11h 26m
2 stops
United Airlines Logo
7:13 pm - 8:54 am
ONT
-
CMI
11h 41m
2 stops
$469United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
1:32 pm - 6:19 pm
CMI
-
ONT
6h 47m
1 stop
United Airlines Logo
7:00 am - 5:28 pm
ONT
-
CMI
8h 28m
1 stop
$528United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
1:32 pm - 6:19 pm
CMI
-
ONT
6h 47m
1 stop
United Airlines Logo
1:18 pm - 12:05 am
ONT
-
CMI
8h 47m
2 stops
$534United Airlines
Tue, Apr 28 - Sun, May 3
American Airlines Logo
3:09 pm - 8:54 pm
CMI
-
ONT
7h 45m
1 stop
American Airlines Logo
6:00 am - 2:39 pm
ONT
-
CMI
6h 39m
1 stop
$537American Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
9:49 am - 9:59 pm
CMI
-
ONT
14h 10m
2 stops
United Airlines Logo
1:18 pm - 12:05 am
ONT
-
CMI
8h 47m
2 stops
$539United Airlines
Thu, Apr 30 - Wed, May 6
American Airlines Logo
7:00 am - 1:18 pm
CMI
-
ONT
8h 18m
1 stop
American Airlines Logo
10:59 am - 8:57 pm
ONT
-
CMI
7h 58m
1 stop
$574American Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
3:09 pm - 10:36 pm
CMI
-
ONT
9h 27m
1 stop
American Airlines Logo
6:00 am - 2:39 pm
ONT
-
CMI
6h 39m
1 stop
$586American Airlines
Mon, Apr 20 - Sat, Apr 25
American Airlines Logo
3:09 pm - 10:36 pm
CMI
-
ONT
9h 27m
1 stop
American Airlines Logo
10:54 am - 8:57 pm
ONT
-
CMI
8h 03m
1 stop
$590American Airlines
Mon, Apr 20 - Sat, Apr 25
American Airlines Logo
2:38 pm - 9:59 pm
CMI
-
ONT
9h 21m
2 stops
American Airlines Logo
10:54 am - 8:57 pm
ONT
-
CMI
8h 03m
1 stop
$596American Airlines
Booking Insights

KAYAK's insights & trends for Champaign to Ontario flights

Get data-powered insights and trends into flights from Champaign to Ontario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Champaign to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Champaign to Ontario were found on United Airlines ($464) and American Airlines ($537).

Find deals

Good to know

Cheapest flight$343
Flight from Champaign to Ontario

When to book flights from Champaign to Ontario

Are your dates flexible? Find out the best times to travel from Champaign to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Champaign to Ontario

  • What is the cheapest flight from Champaign to Ontario?

    In the last 3 days, the lowest price for a flight from Champaign to Ontario was $343 for a one-way ticket and $464 for a round-trip.

  • Do I need a passport to fly between Champaign and Ontario?

    No

  • Which airports will I be using when flying from Champaign to Ontario?

    Champaign and Ontario are both served by 1 main airport. You will leave Champaign from Champaign University-Willard and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Champaign to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Champaign to Ontario?

    oneworld is the only airline alliance operating flights between Champaign and Ontario.

  • How does KAYAK find such low prices on flights from Champaign to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Champaign to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Champaign to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Champaign is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Champaign to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Champaign with another airline. Booking your flights between Champaign and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Champaign to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Champaign up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Champaign to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Champaign to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Champaign to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11521 reviews
7.2Comfort
6.9Entertainment
7.9Crew
6.4Food
7.5Boarding
Airline reviews

Delayed for mechanical and no updates on what was happening and how long the delay might be.

6.0 GoodChristopher, Mar 2026
DFW - SAN
Read more American Airlines reviews

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

Everything you need to know for your flight from Champaign to Ontario

Information on your arrival and departure airports

Champaign (CMI)
Ontario (ONT)