Cheap flights from Allentown, PA to Ontario, CA
Flights starting at $111. Choose between Frontier Airlines, Allegiant Air, or Spirit Airlines to find the best price.
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Cheapest one-way trip | $111 |
---|---|
Cheapest round-trip | $225 |
Average round-trip | $397 |
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, Allegiant Air, Spirit Airlines, WestJet, and Alaska Airlines. Allentown and Ontario have 87 direct flights per week.
Check-in for a flight from Allentown 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 |
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 |
WestJet | WJA | WS | 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 |
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 Allentown
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