Cheap Flights From Los Angeles - Ontario Intl. (ONT) To Harry Reid Intl. (LAS)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Ontario (ONT) to Las Vegas (LAS)

The cheapest flights to Harry Reid Intl. found within the past 7 days were CA $512 round trip and CA $237 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Sep. 13 - Sat, Sep. 20
ONT
Ontario
LAS
Las Vegas
CA $512 Roundtrip, found 15 hours ago
CA $512
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, Sep. 13 from Ontario to Las Vegas, returning Sat, Sep. 20, priced at CA $512 found 15 hours ago
Thu, Sep. 4 - Sat, Sep. 6
ONT
Ontario
LAS
Las Vegas
CA $524 Roundtrip, found 5 days ago
CA $524
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Sat, Sep. 6, priced at CA $524 found 5 days ago
Thu, Sep. 4 - Mon, Sep. 8
ONT
Ontario
LAS
Las Vegas
CA $539 Roundtrip, found 4 days ago
CA $539
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Mon, Sep. 8, priced at CA $539 found 4 days ago
Sat, Sep. 13 - Sat, Sep. 20
ONT
Ontario
LAS
Las Vegas
CA $544 Roundtrip, found 15 hours ago
CA $544
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, Sep. 13 from Ontario to Las Vegas, returning Sat, Sep. 20, priced at CA $544 found 15 hours ago
Thu, Sep. 4 - Mon, Sep. 8
ONT
Ontario
LAS
Las Vegas
CA $547 Roundtrip, found 4 days ago
CA $547
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Mon, Sep. 8, priced at CA $547 found 4 days ago
Sat, Sep. 13 - Sat, Sep. 20
ONT
Ontario
LAS
Las Vegas
CA $547 Roundtrip, found 15 hours ago
CA $547
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, Sep. 13 from Ontario to Las Vegas, returning Sat, Sep. 20, priced at CA $547 found 15 hours ago
Thu, Sep. 4 - Mon, Sep. 8
ONT
Ontario
LAS
Las Vegas
CA $555 Roundtrip, found 4 days ago
CA $555
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Mon, Sep. 8, priced at CA $555 found 4 days ago
Thu, Sep. 4 - Sat, Sep. 6
ONT
Ontario
LAS
Las Vegas
CA $567 Roundtrip, found 5 days ago
CA $567
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Sat, Sep. 6, priced at CA $567 found 5 days ago
Thu, Sep. 4 - Sat, Sep. 6
ONT
Ontario
LAS
Las Vegas
CA $574 Roundtrip, found 5 days ago
CA $574
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Sep. 4 from Ontario to Las Vegas, returning Sat, Sep. 6, priced at CA $574 found 5 days ago
Tue, Aug. 12 - Tue, Aug. 19
ONT
Ontario
LAS
Las Vegas
CA $575 Roundtrip, found 1 day ago
CA $575
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug. 12 from Ontario to Las Vegas, returning Tue, Aug. 19, priced at CA $575 found 1 day ago

Frequently asked questions

Are there direct flights from Los Angeles - Ontario Intl. Airport (ONT) to LAS?
If you'd like to get from ONT to LAS as fast as possible, you'll be glad to know multiple airlines offer direct flights. Choose your favorite seat with Southwest Airlines or Frontier Airlines.
What airlines fly from ONT to McCarran Intl. Airport (LAS)?
There are a number of airlines with direct flights from Ontario Airport to LAS. Southwest Airlines (WN) is one of the most reliable, and operates approximately 108 flights each month. If you want more options, look up the fares on offer from Frontier Airlines (F9). This airline has 43 flights each month. Between the two, there's no doubt you'll find the flight to suit your needs.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.