Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Find cheap one-way flights from Ontario to Las Vegas starting at US$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 book flights 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.
Cheapest 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 US$16
Southwest Airlines
From US$43
Alaska Airlines
From US$151
United Airlines
From US$173
American Airlines
From US$174
Delta Air Lines
From US$322
Hawaiian Airlines
From US$449
ANA airlines

Find more flights and airlines

Find cheap flights from Ontario to Las Vegas by different airports

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

Ontario to Las Vegas Flight Information

Cheapest nonstop flight price

$15

Cheapest round-trip ticket price

$38

Off-season for travel

March

Peak season for travel

February