Cheap flights from Cincinnati, OH to Ontario, CA
Flights starting at $91. Choose between Frontier Airlines, United Airlines, or Alaska Airlines to find the best price.
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Tips to know when travelling to Ontario
Cheapest one-way trip | $92 |
---|---|
Cheapest round-trip | $153 |
Average round-trip | $246 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
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Book your trip to arrive at Ontario International, or Montclair (Ontario). The most popular airlines for this route are Frontier Airlines, United Airlines, Alaska Airlines, Allegiant Air, and Spirit Airlines. Cincinnati and Ontario have 97 direct flights per week.
Check-in for a flight from Cincinnati 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 |
United Airlines | UAL | UA | Yes | No |
Alaska Airlines | ASA | AS | 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 |
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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