Cheap Flights from Ontario to Chicago from CAD 51️ 2024

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Find Ontario to Chicago flights starting at CAD 51.

Book one-way or return flights from Ontario to Chicago from as little as CAD 51. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Ontario to Chicago? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Ontario to Chicago. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find Cheapest Airlines Flying from Ontario to Chicago

View airlines operating flights from Ontario to Chicago. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From CAD 51

Alaska Airlines

From CAD 133

Delta Air Lines

From CAD 139

United Airlines

From CAD 169

Southwest Airlines

From CAD 206

American Airlines

From CAD 221

ANA airlines

Find more flights and airlines

Alternative Routes for Ontario to Chicago Flights

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Ontario to Chicago.

Cheapest
ONT
00:59
21h 57m
1 transfer
ORD
00:56
Ontario International Airport - O'Hare International Airport
Wed, May 1Frontier Airlines
CAD 51
ONT
00:59
8h 39m
1 transfer
MDW
11:38
Ontario International Airport - Midway International Airport
Wed, May 1Frontier Airlines
CAD 51
ONT
23:30
19h 18m
1 transfer
RFD
20:48
Ontario International Airport - Chicago Rockford International Airport
Wed, May 22Frontier Airlines
CAD 250
ONT
23:30
19h 18m
1 transfer
RFD
20:48
Ontario International Airport - Chicago Rockford International Airport
Wed, May 22Frontier Airlines
CAD 250
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How do I find the cheapest flights?

When are flight tickets from Ontario (ONT) to Chicago (CHI) the cheapest?
Airlines adjust prices for flights from Ontario to Chicago based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from Ontario (ONT) to Chicago (CHI) cost?
According to Trip.com's data, the lowest price is around CAD 334.
What is the transportation method from the main airport to downtown in Chicago?
- The distance from O'Hare International Airport to downtown is about 25km, by taxi about 40 minutes.
- The distance from Midway International Airport to downtown is about 14km, by taxi about 30 minutes.
What's the most popular airline for direct flights from Ontario (ONT) to Chicago (CHI)?
United Airlines operates 2 direct flights from Ontario (ONT) to Chicago (CHI).
How many airports in Chicago (CHI)?
There are 5 airport(s) in Chicago (CHI): Chicago Du Page County Airport, Midway International Airport, O'Hare International Airport, Chicago Palwaukee Airport and Chicago Rockford International Airport.

How to find a cheap flight from Ontario to Chicago

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Chicago. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Flight Information for Ontario to Chicago Flights

Cheapest direct flight price	CAD 50
Cheapest return ticket price	CAD 119
Cheapest month	February
Peak season for travel	October
Flight distance	9,812.12km
Popular airline	Frontier Airlines