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If traveling to Ontario, the cheapest city to fly from in the last 3 days was Seattle, with flights as low as $34 one-way and $38 round-trip. Flights from San Francisco are the most searched and start at $38 for a return trip.
Use Google Flights to explore cheap flights to anywhere. Search destinations and track prices to find and book your next flight.
Find flights to Ontario from $76. Fly from the United States on WestJet, Flair Airlines, Air Canada and more. Search for Ontario flights on KAYAK now to find the best deal.
We've compared ticket prices from all top online travel agents and airlines flying to Ontario International Airport to get you the cheapest flights. With Skyscanner, there are no hidden fees – the price you see is the price you pay.
Book cheap flights to Ontario (ONT) with United Airlines. Enjoy all the in-flight perks on your Ontario flight, including speed Wi-Fi.
Search Toronto flights on KAYAK. Find cheap tickets to Toronto from anywhere in United States. KAYAK searches hundreds of travel sites to help you find cheap airfare and book the flight that suits you best. With KAYAK you can also compare prices of plane tickets for last minute flights to Toronto from anywhere in United States.
Looking for flights to Ontario Airport? Compare major airlines and travel agents for cheap Ontario flights at no extra cost. Search and save now with Skyscanner.
