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Cheap flights from Las Vegas to Ontario

LAS — ONT
3 Aug — 10 Aug1
1 adult

Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Ontario are usually found in September or October, booked 46 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Las Vegas to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 29 July 2025.

Popular in

April

Cheapest in

September

Average price

C$ 133
Highest demand for flights based on searches. 19% potential increase in price (C$ 37 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 7 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Best time to book a flight from Las Vegas to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Las Vegas with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Las Vegas to Ontario

How far ahead should I book a flight from Las Vegas to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Las Vegas to Ontario. Price data was last updated on 25 July 2025.

The best time to book flights from Las Vegas to Ontario is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Las Vegas to Ontario?

Currently, September is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of C$ 290). Flying from Las Vegas to Ontario in December is currently the most expensive (average of C$ 461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LAS to ONT?

Find hourly flight availability from Las Vegas to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 July 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Las Vegas to Ontario as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Las Vegas to Ontario flight route?

    This flight path from Las Vegas Harry Reid Intl to Ontario was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • Can I find deals for flights from Las Vegas to Ontario that include hotel bookings?

    Yes. In addition to deals on Las Vegas to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Las Vegas to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Las Vegas to Ontario.

  • Can I find deals for business class flights from Las Vegas to Ontario?

    Yes. Cheapflights offers flight deals from Las Vegas to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Las Vegas to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of C$ 290). Flying from Las Vegas to Ontario in December is currently the most expensive (average of C$ 461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Las Vegas to Ontario

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Las Vegas to Ontario?

Cheapflights helps you search for flights from Las Vegas to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Las Vegas to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Las Vegas to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Las Vegas to Ontario with no change fees?

Yes, we can. To see specific flights from Las Vegas to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Las Vegas to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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