Cheap flights to Ontario International (ONT) from C$168

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Flight deals to Ontario International

Looking for a cheap last-minute deal or the best round-trip flight to Ontario International? Find the lowest prices on one-way and round-trip tickets right here.

Ontario.C$168 per passenger.Departing Mon, May 12.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Calgary on Mon, May 12, arriving in Ontario International.Price includes taxes and charges.From C$168, select.

Ontario.C$170 per passenger.Departing Tue, Apr 29.One-way flight with Porter Airlines (Canada) Ltd.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Toronto Pearson International on Tue, Apr 29, arriving in Ontario International.Price includes taxes and charges.From C$170, select.

Ontario.C$179 per passenger.Departing Tue, Jun 3.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Calgary on Tue, Jun 3, arriving in Ontario International.Price includes taxes and charges.From C$179, select.

Ontario.C$220 per passenger.Departing Tue, Aug 5.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Vancouver International on Tue, Aug 5, arriving in Ontario International.Price includes taxes and charges.From C$220, select.

Ontario.C$221 per passenger.Departing Mon, Jul 21.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Vancouver International on Mon, Jul 21, arriving in Ontario International.Price includes taxes and charges.From C$221, select.

Ontario.C$232 per passenger.Departing Mon, Mar 31.One-way flight with Porter Airlines (Canada) Ltd.Outbound indirect flight with Porter Airlines (Canada) Ltd, departing from Toronto Pearson International on Mon, Mar 31, arriving in Ontario International.Price includes taxes and charges.From C$232, select.

Ontario.C$246 per passenger.Departing Tue, Sep 30.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Vancouver International on Tue, Sep 30, arriving in Ontario International.Price includes taxes and charges.From C$246, select.

Ontario.C$253 per passenger.Departing Sat, Oct 4.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Vancouver International on Sat, Oct 4, arriving in Ontario International.Price includes taxes and charges.From C$253, select.

Find the cheapest time to fly to Ontario International

Flexible on travel dates? Find the cheapest month – or even day – to fly to Ontario International.

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Airports near Ontario

Compare routes to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier.

Frequently asked questions

Which airlines offer direct flights to Ontario International?

Currently, there are no airlines that fly direct to Ontario International. But we found flights with one or more stops from C$288.

When is the cheapest time to fly to Ontario International?

The cheapest month to fly to Ontario International is usually April.

How can I find the best flight deal to Ontario International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

Can I get a direct flight to Ontario International Airport?

No airlines currently offer direct flights between Canada and United States. Most routes have one or more stops.

How much are round-trip flights to Ontario International?

The best price we found for a round-trip flight to Ontario International is C$288. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which upcoming date is cheapest to fly to Ontario International Airport on?

After crunching the numbers on our flight calendar, we found that the cheapest date to fly to Ontario International Airport is Monday, April 7, 2025.

When is the best time to book flights to Ontario?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with to Ontario?

Currently, Porter Airlines (Canada) Ltd offers the cheapest flight tickets to Ontario International.

Flying to Ontario International

The things to know before you go.

Cheapest flight found	C$168
Cheapest month to fly	May

Discover Ontario International

How to find cheap flights to Ontario International Airport

Finding cheap flights to Ontario International Airport is simple with Skyscanner. Flight prices often vary and your fare depends on travel date, seat availability and booking time. We've checked airfares from all top online travel agents and airlines flying to Ontario International Airport to find you the most affordable flights. With Skyscanner, what you see is what you pay – no hidden fees.

Best time to visit Ontario, California, USA

The best time to visit Ontario, California is usually from June to September. During this time, you can expect hot and dry weather, with temperatures often reaching well above 30°C. This makes it a great time to explore all the wonderful things Ontario has to offer. If you prefer fewer crowds or want to save some money, you might want to think about going during the cooler months of the year.

Best time to book flights to Ontario International Airport

Looking for affordable flights to Ontario International Airport from Canada? We recommend booking about 45-60 days in advance. This time frame tends to be the sweet spot for finding the best deals. Remember to use our Price Alert feature for extra savings. Once you've set it up, we'll monitor prices and alert you to any changes, helping you to optimize your travel budget.

Top things to see and do in Ontario, California, USA

Ontario, California, USA offers a blend of modern living and natural beauty. The Ontario Mills mall provides a shopping haven, while the Cucamonga-Guasti Regional Park is a favorite for outdoor activities. Visit Euclid Avenue for unique shops and local designs, or wander around the Ontario City Library to learn about the local history. If you're interested in architecture, the buildings in Downtown Ontario are worth noting. After a day of exploring the Ontario Museum of History and Art and the Chaffey Community Museum of Art, why not unwind at a local cafe and savor a cup of coffee or a cool iced tea?