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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.
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.
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.
Expert Guidance. Get personalized assistance from our travel experts. Call us 24/7 at 1-646-738-4863 to get great deals!
Service telephone: +1 909 937-2700 ; Address: LA - Ontario Airport, 1923 East Avion Street, Ontario, CA 91761, USA ; Operating company: Los Angeles World Airports (LAWA) Parking: Yes; paid short and long-term parking
Flight deals from New York to Ontario International. Looking for a cheap last-minute deal or the best round-trip flight from New York to Ontario International? Find the lowest prices on one-way and round-trip tickets right here.
