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Cheap Flights from Chicago to Ontario, CA, United States - CHI to ONT Last modified: May 25, 2016 6:53 AM

Popular flights from Chicago to Ontario Last modified: May 25, 2016 6:53 AM

We’ve got the inside scoop on finding the best time to fly for the best price. Not sure when to travel for your next vacation? Find details below on when-to-fly and when-to-buy.

Alaska Airlines
Departure Date Return Date Lowest Price
Sep 3, 2016 Sep 5, 2016 $387
American Airlines
Departure Date Return Date Lowest Price
Sep 7, 2016 Sep 14, 2016 $264
United Airlines
Departure Date Return Date Lowest Price
Jul 31, 2016 Aug 10, 2016 $275

How Much Does it Cost to Fly from Chicago to Ontario (CHI to ONT)?

We have collected flight cost data from across the web for travel from Chicago to Ontario, and have found the average flight price for this trip to be $296.

When Can I Buy the Cheapest Flight from Chicago to Ontario (CHI to ONT)?

Airlines can adjust prices for plane tickets from Chicago to Ontario based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.

How far in advance should you book flights from Chicago to Ontario

The chart below shows up-to-date information regarding how far in advance a flight from Chicago to Ontario should be booked.

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $519 $560
7-14 days $497 $350
14-21 days $339 $339
21-30 days $339 $336
30-60 days $279 $287
60-90 days $275 $304
90+ days $357 $264

Cheapest Day To Fly from Chicago to Ontario

The chart below shows up-to-date information regarding the cheapest days to fly from Chicago to Ontario.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$325 $276 $287 $313 $316 $279 $275

Lowest Fares Chart By Month from Chicago to Ontario

The chart below shows the lowest fare by month when flying from Chicago to Ontario.

Month Origin Destination Carrier Depart Date Return Date Stops Price
May Chicago Ontario American 5/31/16 6/1/16 0 $519
June Chicago Ontario American 6/24/16 7/8/16 1 $336
July Chicago Ontario United 7/31/16 8/10/16 0 $275
August Chicago Ontario United 8/2/16 8/7/16 0 $276
September Chicago Ontario American 9/7/16 9/14/16 1 $264
October Chicago Ontario United 10/28/16 11/6/16 1 $315
November Chicago Ontario American 11/21/16 12/1/16 1 $362
December Chicago Ontario United 12/1/16 12/4/16 1 $383

Round Trip vs One Way Flights from Chicago to Ontario (CHI to ONT)

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from Chicago to Ontario. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from Chicago to Ontario is $168.

The average price for round trip flights from Chicago to Ontario is $320.

Chicago to Ontario Flight Questions

Below are some common questions that asked about this flight route:

Question: What are the most popular connecting cities when flying from Chicago to Ontario?
Answer: Denver, CO

Airlines Flying from Chicago to Ontario (CHI to ONT) Number of flights searched: 288Last modified: May 25, 2016 6:53 AM

Below are the different airlines that fly from Chicago to Ontario with the average price of their plane tickets. Just remember that different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary of the next 30 days for flights from Chicago to Ontario.

Chicago to Ontario
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American PHX X X X X X X X
Alaska SEA X X X X X X X
Delta SLC X X X X X X X
Delta DTW / SLC X X X X X X X
United DEN X X X X X X X
Southwest - X X X X X X X
Southwest DEN X X X X X X X

Airports for Your Route

These pages contain information about the major airports in Chicago and Ontario, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

Cheap Domestic Flights from Chicago - CHI

FlightsAirlineLowest Price
Chicago to Los Angeles American, Alaska, Frontier, Spirit, United, Virgin America $118
Chicago to Las Vegas American, Alaska, Frontier, Spirit, United, Virgin America $118
Chicago to Santa Ana American, Alaska, Frontier, United $220
Chicago to San Diego American, Alaska, Frontier, Spirit, United, Virgin America $177
Chicago to Long Beach American, Alaska, JetBlue, United $344
Chicago to San Francisco American, Alaska, Frontier, United, Virgin America $208
Chicago to Phoenix American, Alaska, Frontier, Spirit, United $127
Chicago to Burbank American, Alaska, United $227
Chicago to New York American, Alaska, JetBlue, Spirit, United $116
Chicago to Palm Springs American, Alaska, United, Virgin America $347

Cheap Domestic Flights to Ontario - ONT

FlightsAirlineLowest Price
Milwaukee to Ontario American, Alaska, United $415
Indianapolis to Ontario American, Alaska, United $274
Madison to Ontario American, Alaska, United $352
Grand Rapids to Ontario American, Alaska, United $438
Peoria to Ontario American, United $444
Moline to Ontario American, Alaska, United $493
Ft Wayne to Ontario American, Alaska, United Check Dates
Lansing to Ontario American, Alaska, United Check Dates
South Bend to Ontario United $674
Appleton to OntarioCheck Dates
Green Bay to Ontario United $546
Toledo to Ontario American $512
Bloomington - Normal to Ontario American $498
Springfield to Ontario American, United Check Dates
Kalamazoo to Ontario American, United $1,618
Champaign to Ontario American Check Dates
Dubuque to Ontario American Check Dates
Milwaukee to Los Angeles American, Alaska, Frontier, United $244
Indianapolis to Los Angeles American, Alaska, Frontier, United $187
Grand Rapids to Los Angeles American, Alaska, United $314
Cheap Flights from Chicago to Ontario, CA, United States, from $264 Round trip from CHI to ONT