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If traveling to Ontario, the cheapest city to fly from in the last 3 days was Dallas, with flights as low as $34 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $48 for a return trip.
The cheapest ticket to Ontario from the United States found in the last 72 hours was $26 one-way, and $92 round-trip. The most popular route is New York LaGuardia to Toronto Pearson Intl and the cheapest round-trip airline ticket found on this route in the last 72 hours was $199.
Book cheap flights to Ontario (ONT) with United Airlines. Enjoy all the in-flight perks on your Ontario flight, including speed Wi-Fi.
Use Google Flights to find cheap departing flights to Ontario and to track prices for specific travel dates for your next getaway.
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.
Find flights to Ontario (ONT) with Jetcost. Find the best price for a flight to Ontario by comparing offers from the best travel agencies and airlines in one search.
Fly more and save even more when you travel to Ontario/LA, CA (ONT) with Frontier where you always find low fares done right.
