Cheap Flights From Ontario Intl. Airport (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 Intl. Airport (ONT) to Las Vegas (LAS)

The cheapest flights to Harry Reid Intl. found within the past 7 days were CA $703 round trip and CA $343 one way. Prices and availability subject to change. Additional terms may apply.

Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $703 Roundtrip, found 2 days ago
CA $703
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $703 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $717 Roundtrip, found 2 days ago
CA $717
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $717 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $720 Roundtrip, found 2 days ago
CA $720
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $720 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $724 Roundtrip, found 2 days ago
CA $724
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $724 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $731 Roundtrip, found 2 days ago
CA $731
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $731 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $734 Roundtrip, found 2 days ago
CA $734
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $734 found 2 days ago
Thu, Aug 27 - Sun, Aug 30
ONT
Ontario
LAS
Las Vegas
CA $737 Roundtrip, found 6 days ago
CA $737
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Aug 27 from Ontario to Las Vegas, returning Sun, Aug 30, priced at CA $737 found 6 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $738 Roundtrip, found 2 days ago
CA $738
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $738 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $742 Roundtrip, found 2 days ago
CA $742
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $742 found 2 days ago
Fri, Oct 16 - Mon, Oct 19
ONT
Ontario
LAS
Las Vegas
CA $752 Roundtrip, found 2 days ago
CA $752
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Oct 16 from Ontario to Las Vegas, returning Mon, Oct 19, priced at CA $752 found 2 days 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.

Explore More Ways to Travel with Travelocity

*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.