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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 find cheap departing flights to Ontario and to track prices for specific travel dates for your next getaway.
Direct flights from more than 900 airlines on an interactive flight map. Search, find and compare any flight path or airline route with our flight maps!
We've compared plane tickets from all major online travel agents and airlines flying to Ontario to find the cheapest flights. And with us, there are no hidden fees – what you see is what you pay. Flex your dates to secure the best air ticket price for your Ontario flight.
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 your cheap flights to Ontario and your hotels with flighthub.com. We Search every major airlines and hotel suppliers to find the best deals.
Find your travel time to estimate the length of a flight between airports, or ask how long it takes to fly from one city to another. You can also search for the closest airport to any city in the world or check the flying distance between airports.
