Cheap flights from Allentown, PA to Ontario, CA
Choose between Frontier Airlines, Allegiant Air, or Spirit Airlines to find the best price
Make your travel wishlist, we'll do the rest
Hidden deals
Kiwi-Code uncovers prices airlines don't want you to see.
Effortless booking
Use our flexible filters to tailor your search.
Travel hacking
Look out for the travel hack star icon for even cheaper fares.
Tips to know when travelling to Ontario
Cheapest nonstop round-trip | £180 |
---|---|
Most popular airline | Frontier Airlines |
Search by stops
- Nonstop
- Up to 1 stop
- Up to 2 stops
Search by carrier
Search by price
Search by departure date
Sorry, we couldn't find any results
Sorry, we couldn't find any results
Receive exclusive deals by email
By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
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
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from Allentown
- Flights from Allentown to Orlando
- Flights from Allentown to New York
- Flights from Allentown to Las Vegas
- Flights from Allentown to Denver
- Flights from Allentown to Chicago
- Flights from Allentown to Miami
- Flights from Allentown to Los Angeles
- Flights from Allentown to Atlanta
- Flights from Allentown to Mexico City
- Flights from Allentown to Bogotá
- Flights from Allentown to Dallas
- Flights from Allentown to Phoenix
- Flights from Allentown to Philadelphia
- Flights from Allentown to San Francisco
- Flights from Allentown to Cancún
- Flights from Allentown to Houston
- Flights from Allentown to San Juan
- Flights from Allentown to Washington, D.C.
- Flights from Allentown to Dhaka
- Flights from Allentown to Fort Lauderdale
Flights to Ontario
- Flights from London to Ontario
- Flights from New York to Ontario
- Flights from Bangkok to Ontario
- Flights from San Francisco to Ontario
- Flights from Denver to Ontario
- Flights from Sacramento to Ontario
- Flights from Taipei to Ontario
- Flights from Manila to Ontario
- Flights from Toronto to Ontario
- Flights from Calgary to Ontario
- Flights from Seattle to Ontario
- Flights from Las Vegas to Ontario
- Flights from San Jose to Ontario
- Flights from Orlando to Ontario
- Flights from Houston to Ontario
- Flights from Macau to Ontario
- Flights from Los Angeles to Ontario
- Flights from Washington, D.C. to Ontario
- Flights from Guadalajara to Ontario
- Flights from Manchester to Ontario
Popular routes
- Flights from St. Louis to Gorakhpur
- Flights from West Palm Beach to Hurghada
- Flights from Sylhet to Tangier
- Flights from Portland to Istanbul
- Flights from Salvador to Hermosillo
- Flights from Los Angeles to Monrovia
- Flights from Cincinnati to Bandar Seri Begawan
- Flights from San Diego to Iquitos
- Flights from Guwahati to Lagos
- Flights from Singapore to Jakarta
- Flights from Reykjavik to Maceió
- Flights from London to Athens
Airports near Allentown
- John F. Kennedy International
- Newark Liberty International
- Philadelphia International
- LaGuardia
- Baltimore–Washington International
- Washington Dulles International
- New York Stewart International Airport
- Ronald Reagan Washington National
- Long Island MacArthur
- Trenton–Mercer