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Ontario International Airport to Chicago flight
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Cheap Flights from Ontario International Airport to Chicago

Search for flights from Ontario International Airport to Chicago and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Ontario - Chicago|Wed, May 1|Frontier Airlines
        CAD 51CAD 88
        42% OFF
        42% OFF
        CAD 88CAD 51
      • ONT00:59
        8h 10m
        1 stop
        MDW11:09
        Ontario - Chicago|Wed, May 29|Frontier Airlines
        CAD 53CAD 88
        40% OFF
        40% OFF
        CAD 88CAD 53
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Ontario - Chicago|Wed, May 8|Frontier Airlines
        CAD 55CAD 88
        38% OFF
        38% OFF
        CAD 88CAD 55
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Ontario - Chicago|Tue, May 14|Frontier Airlines
        CAD 58
        CAD 58
      • ONT00:59
        8h 10m
        1 stop
        MDW11:09
        Ontario - Chicago|Wed, May 22|Frontier Airlines
        CAD 58
        CAD 58
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Ontario - Chicago|Wed, May 15|Frontier Airlines
        CAD 58
        CAD 58
      • ONT00:55
        22h 1m
        1 stop
        ORD00:56
        Ontario - Chicago|Sat, May 4|Frontier Airlines
        CAD 60
        CAD 60
      • ONT22:10
        5h 40m
        1 stop
        MDW05:50
        Ontario - Chicago|Sat, May 18|Frontier Airlines
        CAD 61
        CAD 61
      • ONT00:55
        22h 1m
        1 stop
        ORD00:56
        Ontario - Chicago|Sat, May 11|Frontier Airlines
        CAD 62
        CAD 62
      • ONT00:59
        8h 39m
        1 stop
        MDW11:38
        Ontario - Chicago|Tue, May 7|Frontier Airlines
        CAD 63
        CAD 63
      • ONT13:00
        3h 5m
        Direct
        CHI14:00
        Los Angeles - Chicago|Tue, May 7|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.

Selected Airlines from Ontario International Airport to Chicago

See which airlines fly from Ontario International Airport to Chicago. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

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
Jetblue Airways
From CAD 484
ANA airlines
Find more flights and airlines

Flight Info of Flights from Ontario International Airport to Chicago

Cheapest return ticket price

CAD 98

Cheapest direct flight price

CAD 50

Cheapest month

March

Peak season for travel

October

FAQs for Ontario International Airport to Chicago Flights

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