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Flights from Ontario to Las Vegas Starting at $16

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from Ontario to Las Vegas?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Find cheap airlines flights from Ontario to Las Vegas

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From $16
Southwest Airlines
From $43
Alaska Airlines
From $152
United Airlines
From $173
American Airlines
From $174
Delta Air Lines
From $322
Hawaiian Airlines
From $497
ANA airlines

Find more flights and airlines

Alternative Cheap Routes from Ontario to Las Vegas

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Ontario to Las Vegas.

  • Cheapest
    Frontier Airlines
    ONT
    12:39
    1h 9m
    Direct
    LAS
    13:48
    Ontario International Airport - Harry Reid International Airport
    Tue, Apr 23Frontier Airlines
    $16
  • Frontier Airlines
    ONT
    12:39
    1h 9m
    Direct
    LAS
    13:48
    Ontario International Airport - Harry Reid International Airport
    Tue, Apr 23Frontier Airlines
    $16
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Ontario (ONT) to Las Vegas (LAS) the cheapest?

    Airlines adjust prices for flights from Ontario to Las Vegas based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Ontario (ONT) to Las Vegas (LAS) cost?

    According to Trip.com's data, the lowest price is around $148.

Travel Info | Ontario to Las Vegas

Cheapest nonstop flight price

$15

Cheapest round-trip ticket price

$38

Off-season for travel

March

Peak season for travel

February