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Cheap Flights from Ontario to Chicago, IL, United States - ONT to CHI Last modified: May 29, 2016 7:31 PM

Popular flights from Ontario to Chicago Last modified: May 29, 2016 7:31 PM

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 19, 2016 Aug 22, 2016 $387
Sep 8, 2016 Sep 12, 2016 $387
Sep 9, 2016 Sep 11, 2016 $387
Sep 14, 2016 Sep 28, 2016 $387
Sep 16, 2016 Sep 18, 2016 $387
American Airlines
Departure Date Return Date Lowest Price
Aug 19, 2016 Aug 22, 2016 $263
United Airlines
Departure Date Return Date Lowest Price
Aug 19, 2016 Aug 22, 2016 $227

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

We have collected flight cost data from across the web for travel from Ontario to Chicago, and have found the average flight price for this trip to be $252.

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

Airlines can adjust prices for plane tickets from Ontario to Chicago 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.

Cheapest Day To Fly from Ontario to Chicago

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

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$277 $234 $234 $234 $227 $234 $319

Lowest Fares Chart By Month from Ontario to Chicago

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

Month Origin Destination Carrier Depart Date Return Date Stops Price
May Ontario Chicago United 5/30/16 6/3/16 2 $607
June Ontario Chicago United 6/20/16 6/24/16 0 $277
July Ontario Chicago United 7/6/16 7/14/16 1 $329
August Ontario Chicago United 8/19/16 8/22/16 0 $227
September Ontario Chicago United 9/3/16 9/9/16 1 $234
October Ontario Chicago United 10/31/16 11/9/16 1 $230
November Ontario Chicago United 11/3/16 11/6/16 1 $234
December Ontario Chicago United 12/2/16 12/4/16 1 $234

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

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 Ontario to Chicago. 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 Ontario to Chicago is $169.

The average price for round trip flights from Ontario to Chicago is $292.

Ontario to Chicago Flight Questions

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

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

Airlines Flying from Ontario to Chicago (ONT to CHI) Number of flights searched: 259Last modified: May 29, 2016 7:31 PM

Below are the different airlines that fly from Ontario to Chicago 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 Ontario to Chicago.

Ontario to Chicago
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 SLC / DTW X X X X X X X
United SFO 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 Ontario and Chicago, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

Cheap Domestic Flights to Chicago - CHI

FlightsAirlineLowest Price
Los Angeles to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $167
San Diego to Chicago American, Alaska, Frontier, Spirit, United, Virgin America $187
Las Vegas to Chicago American, Alaska, Frontier, Spirit, United, Virgin America $118
Santa Ana to Chicago American, Alaska, Frontier, United $254
Burbank to Chicago American, Alaska, United $250
Palm Springs to Chicago American, Alaska, United, Virgin America $368
Long Beach to Chicago American, Alaska, JetBlue, United $376
Bakersfield to Chicago American, United $412
Santa Barbara to Chicago American, Alaska, United $362
Yuma to Chicago American, Alaska $387
San Luis Obispo to Chicago American, United $412
Palomar to ChicagoCheck Dates
Los Angeles to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $285
Los Angeles to Atlanta American, Alaska, Frontier, Spirit, United $188
Los Angeles to Milwaukee American, Alaska, Frontier, United $274
Los Angeles to Dallas - Ft Worth American, Alaska, Frontier, Spirit, United, Virgin America $167
Los Angeles to Detroit American, Alaska, JetBlue, Frontier, Spirit, United $244
Las Vegas to Milwaukee American, Alaska, Frontier, United $148
Los Angeles to Las Vegas American, Spirit, United, Virgin America $71
Las Vegas to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $241
Los Angeles to Indianapolis American, Alaska, Frontier, United $204
Los Angeles to Minneapolis - St Paul American, Alaska, Frontier, Spirit, Sun Country, United $193
Los Angeles to Denver American, Alaska, Frontier, Spirit, United, Virgin America $88
Los Angeles to St Louis American, Alaska, Frontier, United $244
Los Angeles to Madison American, Alaska, Frontier, United $304
San Diego to Milwaukee American, Alaska, Frontier, United $261
Las Vegas to Detroit American, Alaska, JetBlue, Frontier, Spirit, United $244
San Diego to Atlanta American, Alaska, JetBlue, Frontier, Spirit, United $318

Cheap International Flights to Chicago - CHI

FlightsAirlineLowest Price
Tijuana to Chicago American, AeroMexico, Alaska, United, Virgin America, Volaris $487
Los Angeles to Toronto American, Air Canada, Alaska, JetBlue, Frontier, Sun Country, United, Virgin America, WestJet $359
Cheap Flights from Ontario to Chicago, IL, United States, from $227 Round trip from ONT to CHI