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Flights from Chicago to Ontario
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Flights from Chicago to Ontario Starting at NZD 79

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • Cheapest nonstop
        MDW09:00
        4h 30m
        Nonstop
        ONT11:30
        Wed, Jan 22|Chicago - Ontario|Southwest Airlines
        NZD 266NZD 319
        17% OFF
        17% OFF
        NZD 319NZD 266

        Choose Southwest Airlines flights from Chicago to Ontario. The one-way direct flight with Southwest Airlines departs from Midway International Airport on Wed, Jan 22, arriving at Ontario International Airport. One-way Prices start from NZD 266 including taxes and charges.

      • MDW09:00
        4h 30m
        Nonstop
        ONT11:30
        Tue, Feb 25|Chicago - Ontario|Southwest Airlines
        NZD 268NZD 319
        16% OFF
        16% OFF
        NZD 319NZD 268

        Choose Southwest Airlines flights from Chicago to Ontario. The one-way direct flight with Southwest Airlines departs from Midway International Airport on Tue, Feb 25, arriving at Ontario International Airport. One-way Prices start from NZD 268 including taxes and charges.

      • ORD10:56
        9h 2m
        1 stop
        ONT17:58
        Wed, Mar 5|Chicago - Ontario|Frontier Airlines
        NZD 79NZD 319
        75% OFF
        75% OFF
        NZD 319NZD 79

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from O'Hare International Airport on Wed, Mar 5, arriving at Ontario International Airport. One-way Prices start from NZD 79 including taxes and charges.

      • MDW08:15
        17h 32m
        1 stop
        ONT23:47
        Tue, Jan 28|Chicago - Ontario|Frontier Airlines
        NZD 81
        NZD 81

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Jan 28, arriving at Ontario International Airport. One-way Prices start from NZD 81 including taxes and charges.

      • MDW12:43
        7h 9m
        1 stop
        ONT17:52
        Thu, Jan 9|Chicago - Ontario|Frontier Airlines
        NZD 82
        NZD 82

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Thu, Jan 9, arriving at Ontario International Airport. One-way Prices start from NZD 82 including taxes and charges.

      • ORD06:50
        19h 16m
        1 stop
        ONT00:06
        Wed, Feb 19|Chicago - Ontario|Frontier Airlines
        NZD 87
        NZD 87

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from O'Hare International Airport on Wed, Feb 19, arriving at Ontario International Airport. One-way Prices start from NZD 87 including taxes and charges.

      • MDW08:15
        17h 32m
        1 stop
        ONT23:47
        Tue, Feb 4|Chicago - Ontario|Frontier Airlines
        NZD 89
        NZD 89

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Feb 4, arriving at Ontario International Airport. One-way Prices start from NZD 89 including taxes and charges.

      • MDW08:15
        17h 29m
        1 stop
        ONT23:44
        Tue, Jan 14|Chicago - Ontario|Frontier Airlines
        NZD 89
        NZD 89

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Jan 14, arriving at Ontario International Airport. One-way Prices start from NZD 89 including taxes and charges.

      • ORD18:36
        14h 35m
        1 stop
        ONT07:11
        Thu, Jan 23|Chicago - Ontario|Frontier Airlines
        NZD 90
        NZD 90

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from O'Hare International Airport on Thu, Jan 23, arriving at Ontario International Airport. One-way Prices start from NZD 90 including taxes and charges.

      • MDW08:15
        17h 32m
        1 stop
        ONT23:47
        Tue, Jan 21|Chicago - Ontario|Frontier Airlines
        NZD 90
        NZD 90

        Choose Frontier Airlines flights from Chicago to Ontario. The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Jan 21, arriving at Ontario International Airport. One-way Prices start from NZD 90 including taxes and charges.

      • CHI01:00 pm
        3h 5m
        Nonstop
        ONT02:00 pm
        Sun, Jan 5|Chicago - Ontario|Southwest Airlines
        Find More Flights
        Find More Flights

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

Find the best time to fly from Chicago to Ontario

We monitor flight fares to help you find the best deals effortlessly

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

Airlines Flying from Chicago to Ontario

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From NZD 79
Alaska Airlines
From NZD 150
American Airlines
From NZD 161
Southwest Airlines
From NZD 171
Delta Air Lines
From NZD 178
United Airlines
From NZD 222
Allegiant Air
From NZD 236
Spirit Airlines
From NZD 249

Find more flights and airlines

Alternative Routes from Chicago to Ontario

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Chicago to Ontario.

  • Cheapest
    Frontier Airlines
    ORD
    10:56
    9h 2m
    1 transfer
    ONT
    17:58
    O'Hare International Airport - Ontario International Airport
    Wed, Mar 5Frontier Airlines
    NZD 79
  • Frontier Airlines
    MDW
    08:15
    17h 32m
    1 transfer
    ONT
    23:47
    Midway International Airport - Ontario International Airport
    Tue, Jan 28Frontier Airlines
    NZD 81
  • Allegiant Air
    RFD
    12:44
    20h 27m
    1 transfer
    ONT
    07:11
    Chicago Rockford International Airport - Ontario International Airport
    Thu, Feb 6Allegiant Air
    NZD 236
  • Allegiant Air
    RFD
    12:44
    20h 27m
    1 transfer
    ONT
    07:11
    Chicago Rockford International Airport - Ontario International Airport
    Thu, Feb 6Allegiant Air
    NZD 236
    Find More Flights

FAQ

  • When are flight tickets from Chicago (CHI) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Chicago to Ontario 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 Chicago (CHI) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around NZD 424.

How to find a cheap flight from Chicago to Ontario

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 Chicago to Ontario. 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 Chicago to Ontario

Cheapest nonstop flight priceNZD 79
Cheapest round-trip ticket priceNZD 260
Off-season for travelSeptember
Peak season for travelNovember
Flight distance9,812.12 km
Popular airlineFrontier Airlines

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