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If traveling to Ontario, the cheapest city to fly from in the last 3 days was San Francisco, with flights as low as $33 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $48 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.
Use Google Flights to find cheap departing flights to Ontario and to track prices for specific travel dates for your next getaway.
Book cheap flights to Ontario (ONT) with United Airlines. Enjoy all the in-flight perks on your Ontario flight, including speed Wi-Fi.
Looking for flights to Ontario International Airport? Compare major airlines and travel agents for cheap Ontario International flights at no extra cost. Search and save now with Skyscanner.
There are 22 non-stop flights from United States to Toronto, Ontario. See the full list of airline routes and airports to book your trip. You may need to drive to a nearby airport to get a direct flight. Use the form below to search for cheap airline tickets.
Compare flights from Ontario International Airport from hundreds of providers. Find a cheap flight deal from Ontario International Airport to anywhere, anytime. Book the best plane ticket in minutes... with no extra fees.
