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Latest Flight Deals from Ontario to Chicago

Book one-way or return flights from Ontario to Chicago from as little as NZD 63. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • ONT00:59
        21h 57m
        1 stop
        ORD00:56
        Wed, May 1|Ontario - Chicago|Frontier Airlines
        NZD 63NZD 105
        40% OFF
        40% OFF
        NZD 105NZD 63
      • ONT00:59
        8h 10m
        1 stop
        MDW11:09
        Wed, May 29|Ontario - Chicago|Frontier Airlines
        NZD 65NZD 105
        38% OFF
        38% OFF
        NZD 105NZD 65
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Wed, May 8|Ontario - Chicago|Frontier Airlines
        NZD 67NZD 105
        36% OFF
        36% OFF
        NZD 105NZD 67
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Tue, May 14|Ontario - Chicago|Frontier Airlines
        NZD 71
        NZD 71
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Wed, May 15|Ontario - Chicago|Frontier Airlines
        NZD 71
        NZD 71
      • ONT00:55
        22h 1m
        1 stop
        ORD00:56
        Sat, May 4|Ontario - Chicago|Frontier Airlines
        NZD 74
        NZD 74
      • ONT22:10
        5h 40m
        1 stop
        MDW05:50
        Sat, May 18|Ontario - Chicago|Frontier Airlines
        NZD 76
        NZD 76
      • ONT00:55
        22h 1m
        1 stop
        ORD00:56
        Sat, May 11|Ontario - Chicago|Frontier Airlines
        NZD 76
        NZD 76
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Tue, May 7|Ontario - Chicago|Frontier Airlines
        NZD 77
        NZD 77
      • ONT00:59
        21h 57m
        1 stop
        ORD00:56
        Tue, Apr 30|Ontario - Chicago|Frontier Airlines
        NZD 78
        NZD 78
      • ONT13:00
        3h 5m
        Direct
        CHI14:00
        Mon, May 6|Ontario - Chicago|Frontier Airlines
        Find More Flights
        Find More Flights

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.
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 NZD 63
Alaska Airlines
From NZD 164
Delta Air Lines
From NZD 172
United Airlines
From NZD 208
Southwest Airlines
From NZD 254
American Airlines
From NZD 272
ANA airlines

Find more flights and airlines

Alternative Routes from Ontario to Chicago

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

  • Cheapest
    Frontier Airlines
    ONT
    00:59
    21h 57m
    1 transfer
    ORD
    00:56
    Ontario International Airport - O'Hare International Airport
    Wed, May 1Frontier Airlines
    NZD 63
  • Frontier Airlines
    ONT
    00:59
    8h 39m
    1 transfer
    MDW
    11:38
    Ontario International Airport - Midway International Airport
    Wed, May 1Frontier Airlines
    NZD 63
  • Frontier Airlines
    ONT
    23:30
    19h 18m
    1 transfer
    RFD
    20:48
    Ontario International Airport - Chicago Rockford International Airport
    Wed, May 22Frontier Airlines
    NZD 308
  • Frontier Airlines
    ONT
    23:30
    19h 18m
    1 transfer
    RFD
    20:48
    Ontario International Airport - Chicago Rockford International Airport
    Wed, May 22Frontier Airlines
    NZD 308
    Find More Flights

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 departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ontario (ONT) to Chicago (CHI) cost?

    According to Trip.com's data, the lowest price is around NZD 411.

  • 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. It takes about 40 minutes by taxi.
    • The distance from Midway International Airport to downtown is about 14km. It takes about 30 minutes by taxi.

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.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from Ontario to Chicago

Cheapest nonstop flight price

NZD 62

Cheapest round-trip ticket price

NZD 147

Off-season for travel

February

Peak season for travel

October

Flight distance

9,812.12km

Popular airline

Frontier Airlines

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