Cheap flights from Chicago, IL to Ontario, CA
Flights starting at $44. Choose between Frontier Airlines, Alaska Airlines, or United Airlines to find the best price.
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Tips to know when travelling to Ontario
Cheapest one-way trip | $107 |
---|---|
Cheapest round-trip | $307 |
Most popular airline | Frontier Airlines |
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Travelers usually depart from O Hare International, Chicago Midway International, or Chicago Rockford International when they travel from Chicago to Ontario. The most popular airlines for this route are Frontier Airlines, Alaska Airlines, United Airlines, Spirit Airlines, and Sun Country Airlines. Chicago and Ontario have 186 direct flights per week.
Check-in for a flight from Chicago to Ontario
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 |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Sun Country Airlines | SCX | SY | Yes | No |
Weather in Ontario
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 18°C | 7°C |
February | 18°C | 7°C |
March | 20°C | 8°C |
April | 23°C | 10°C |
May | 25°C | 13°C |
June | 29°C | 16°C |
July | 33°C | 19°C |
August | 33°C | 20°C |
September | 32°C | 18°C |
October | 27°C | 15°C |
November | 22°C | 10°C |
December | 17°C | 7°C |
14 day forecast
Frequently asked questions
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Airports near Chicago
- O Hare International
- Chicago Midway International
- General Mitchell International
- Gerald R. Ford International
- Dane County Regional
- General Wayne A. Downing Peoria International
- Chicago Rockford International
- Fort Wayne International
- South Bend International
- Muskegon County