Cheap flights from Ontario, CA to Chicago, IL
Flights starting at £53. Choose between Frontier Airlines, Allegiant Air, or Spirit Airlines to find the best price.
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Tips to know when travelling to Chicago
Cheapest one-way trip | £53 |
---|---|
Cheapest round-trip | £106 |
Average round-trip | £148 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
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Book your trip to arrive at O Hare International, Chicago Midway International, or Chicago Rockford International. The most popular airlines for this route are Frontier Airlines, Allegiant Air, Spirit Airlines, United Airlines, and Alaska Airlines. Ontario and Chicago have 309 direct flights per week.
Weekly direct flights
Discover the top airlines offering direct flights from Ontario to Chicago in the next month. You’ll find the number of daily direct flights per airline in the table.
Weekly direct flights for Mon 25.03 - Sun 31.03
Airline | Mon 25.03 | Tue 26.03 | Wed 27.03 | Thu 28.03 | Fri 29.03 | Sat 30.03 | Sun 31.03 |
---|---|---|---|---|---|---|---|
1 | 1 | 1 | 1 | 1 | 1 | --- |
Weekly direct flights for Mon 01.04 - Sun 07.04
Airline | Mon 01.04 | Tue 02.04 | Wed 03.04 | Thu 04.04 | Fri 05.04 | Sat 06.04 | Sun 07.04 |
---|---|---|---|---|---|---|---|
--- | --- | --- | --- | --- | --- | --- |
Weekly direct flights for Mon 08.04 - Sun 14.04
Airline | Mon 08.04 | Tue 09.04 | Wed 10.04 | Thu 11.04 | Fri 12.04 | Sat 13.04 | Sun 14.04 |
---|---|---|---|---|---|---|---|
--- | --- | --- | --- | --- | --- | --- |
Weekly direct flights for Mon 15.04 - Sun 21.04
Airline | Mon 15.04 | Tue 16.04 | Wed 17.04 | Thu 18.04 | Fri 19.04 | Sat 20.04 | Sun 21.04 |
---|---|---|---|---|---|---|---|
--- | --- | --- | --- | --- | --- | --- |
Check-in for a flight from Ontario to Chicago
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
Weather in Chicago
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 0°C | -6°C |
February | 0°C | -5°C |
March | 5°C | 0°C |
April | 10°C | 4°C |
May | 17°C | 10°C |
June | 22°C | 16°C |
July | 25°C | 20°C |
August | 25°C | 19°C |
September | 22°C | 16°C |
October | 15°C | 10°C |
November | 8°C | 3°C |
December | 2°C | -1°C |
14 day forecast
Frequently asked questions
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