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Cheap Flights from Chicago to Ontario, CA, United States - CHI to ONT

Popular flights from Chicago to Ontario

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
Aug 10, 2016 Aug 12, 2016 $321
American Airlines
Departure Date Return Date Lowest Price
Aug 10, 2016 Aug 12, 2016 $268
United Airlines
Departure Date Return Date Lowest Price
May 28, 2016 Jun 3, 2016 $257
Jun 3, 2016 Jun 6, 2016 $257

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 $274.

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 $0 $314
7-14 days $0 $294
14-21 days $414 $274
21-30 days $329 $257
30-60 days $260 $257
60-90 days $283 $274
90+ days $277 $268

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
$308 $277 $274 $260 $257 $257 $290

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
April Chicago Ontario United 4/29/16 5/2/16 1 $420
May Chicago Ontario United 5/28/16 6/3/16 1 $257
June Chicago Ontario United 6/3/16 6/6/16 1 $257
July Chicago Ontario United 7/22/16 7/24/16 1 $274
August Chicago Ontario American 8/10/16 8/12/16 1 $268
September Chicago Ontario American 9/3/16 9/7/16 1 $274
October Chicago Ontario American 10/5/16 10/8/16 1 $274
November Chicago Ontario American 11/16/16 11/21/16 1 $327

TIPSave $182 by flying into Las Vegas instead of Ontario from Chicago

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 $129.

The average price for round trip flights from Chicago to Ontario is $285.

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)

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 DFW 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 MSP / SLC X X X X X X X
United IAH X X X X X X X
Southwest - X X X X X X X
Southwest LAS 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 $127
Chicago to Las Vegas American, Alaska, Frontier, Spirit, United, Virgin America $97
Chicago to Santa Ana American, Alaska, Frontier, United $191
Chicago to San Diego American, Alaska, Frontier, Spirit, United, Virgin America $147
Chicago to Long Beach American, Alaska, JetBlue, United $300
Chicago to San Francisco American, Alaska, Frontier, United, Virgin America $158
Chicago to Phoenix American, Alaska, Frontier, Spirit, United $127
Chicago to Burbank American, Alaska, United $268
Chicago to New York American, Alaska, JetBlue, Spirit, United $86
Chicago to Palm Springs American, Alaska, United, Virgin America $359

Cheap Domestic Flights to Ontario - ONT

FlightsAirlineLowest Price
Milwaukee to Ontario American, Alaska, United $311
Indianapolis to Ontario American, Alaska, United $224
Madison to Ontario American, Alaska, United $431
Grand Rapids to Ontario American, Alaska, United $449
Peoria to Ontario American, United $538
Moline to Ontario American, Alaska, United $472
Ft Wayne to Ontario American, Alaska, United $480
Lansing to Ontario American, Alaska, United $501
South Bend to Ontario United $378
Appleton to Ontario Alaska, United $790
Green Bay to Ontario American, Alaska, United Check Dates
Toledo to Ontario American $453
Bloomington - Normal to Ontario American $408
Springfield to Ontario American, United $412
Kalamazoo to Ontario American, United $460
Champaign to Ontario American $503
Dubuque to Ontario American $523
Milwaukee to Los Angeles American, Alaska, Frontier, United $261
Indianapolis to Los Angeles American, Alaska, Frontier, United $218
Grand Rapids to Los Angeles American, Alaska, United $360
Cheap Flights from Chicago to Ontario, CA, United States, from $257 Round trip from CHI to ONT