Which airlines offer direct flights to Ontario International?

Southwest Airlines, American Airlines, SkyWest Airlines, Delta, United, Alaska Airlines, Frontier Airlines and WestJet all fly non-stop to Ontario International.

When is the cheapest time to fly to Ontario International?

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

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?

Yes – the average flight time is 3 hours and 9 minutes.

How much are round-trip flights to Ontario International?

The best price we found for a round-trip flight to Ontario International is $47. 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 Thursday, September 12, 2024 .

When is the best time to book flights to Ontario International?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Ontario International 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 International?

Currently, Frontier Airlines offers the cheapest flight tickets to Ontario International.

$47 Cheap Flights to Ontario International (ONT)

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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.$47 per passenger.Departing Thu, Sep 12, returning Sat, Sep 14.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Las Vegas Harry Reid International on Thu, Sep 12, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Sat, Sep 14, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $47, select.

Ontario.$48 per passenger.Departing Wed, Aug 28, returning Wed, Sep 18.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Las Vegas Harry Reid International on Wed, Aug 28, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Wed, Sep 18, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $48, select.

Ontario.$48 per passenger.Departing Mon, May 6, returning Thu, May 9.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Las Vegas Harry Reid International on Mon, May 6, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Thu, May 9, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $48, select.

Ontario.$48 per passenger.Departing Sat, Jun 1, returning Mon, Jun 3.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Las Vegas Harry Reid International on Sat, Jun 1, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Mon, Jun 3, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From $48, 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

Looking for an alternative route to Ontario? There are 6 more airports nearby. Compare them below to find the cheapest or fastest.

Direct flights to Ontario International

Alaska Airlines

jetBlue

Southwest Airlines

Frequently asked questions

: Southwest Airlines, American Airlines, SkyWest Airlines, Delta, United, Alaska Airlines, Frontier Airlines and WestJet all fly non-stop to Ontario International.
: The cheapest month to fly to Ontario International is usually September.
: 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.
: Yes – the average flight time is 3 hours and 9 minutes.
: The best price we found for a round-trip flight to Ontario International is $47. 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.
: After crunching the numbers on our flight calendar, we found that the cheapest date to fly to Ontario International Airport is Thursday, September 12, 2024.
: We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Ontario International is around 40 days in advance, so don’t leave your flight to the last minute.
: Currently, Frontier Airlines offers the cheapest flight tickets to Ontario International.

Flying to Ontario International

The things to know before you go.

Cheapest flight found	$47
Cheapest month to fly	September
Average flight time	3 hrs, 8 mins
Most popular airline	Southwest Airlines
Average flights per week	989

Discover Ontario International

How to find cheap flights to Ontario International Airport

Finding cheap flights to Ontario International Airport is easy with Skyscanner. Flight prices often change depending on travel dates, seat availability, and booking time. 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.

Best time to visit Ontario, California, USA

The best time to visit Ontario, California, is from June to September when Ontario enjoys hot, dry weather with temperatures often soaring well above 86°F. If you prefer fewer crowds or are looking to save some money, consider visiting in the other months. Just bear in mind that the off-peak season can see more rain, and the temperatures are a bit cooler.

Best time to book flights to Ontario International Airport

Looking for cheap tickets to Ontario International Airport from the United States? We recommend booking your flight about 45-60 days in advance – this timeframe typically offers the best deals. Remember to use Skyscanner's Price Alert feature for added ease. Once set up, we'll monitor prices and alert you of any changes so you can make the most of your travel budget.

Top things to see and do in Ontario

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 Ontario City Library to delve into the local history. If you have a keen eye for 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, savoring a cup of coffee or a cool iced tea.

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