Cheap flights from Ontario, CA to Belleville, IL
Flights starting at £87. Choose between Allegiant Air, Frontier Airlines, or Spirit Airlines to find the best price.
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Travelers usually depart from Ontario International, or Montclair (Ontario) when they travel from Ontario to Belleville. The most popular airlines for this route are Allegiant Air, Frontier Airlines, Spirit Airlines, JetBlue Airways, and Avianca. Ontario and Belleville have 56 direct flights per week.
Check-in for a flight from Ontario to Belleville
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | 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 |
JetBlue Airways | JBU | B6 | No | Opens 24 days before flight Closes 2 hours before flight |
Avianca | AVA | AV | No | Opens 48 days before flight Closes 1 hours before flight |
Weather in Belleville
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 3°C | -3°C |
February | 6°C | -2°C |
March | 12°C | 3°C |
April | 18°C | 8°C |
May | 23°C | 14°C |
June | 29°C | 19°C |
July | 30°C | 20°C |
August | 29°C | 19°C |
September | 26°C | 16°C |
October | 19°C | 10°C |
November | 12°C | 3°C |
December | 7°C | 0°C |
14 day forecast
Frequently asked questions
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Flights to Belleville
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