$29 Cheap Flights from Ontario (ONT) to Las Vegas (LAS)

View $29 flight on Wed, Jan 28, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)

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Cheap Flights from Ontario to Las Vegas (ONT-LAS)

Prices were available within the past 7 days and start at $29 for one-way flights and $58 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jan 13 - Wed, Jan 21
ONT
Ontario
LAS
Las Vegas
$58 Roundtrip, found 3 hours ago
$58
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, Jan 13 from Ontario to Las Vegas, returning Wed, Jan 21, priced at $58 found 3 hours ago
Frontier Airlines
Mon, Jan 26 - Wed, Jan 28
ONT
Ontario
LAS
Las Vegas
$60 Roundtrip, just found
$60
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Jan 26 from Ontario to Las Vegas, returning Wed, Jan 28, priced at $60 just found
Frontier Airlines
Wed, Jan 14 - Fri, Jan 23
ONT
Ontario
LAS
Las Vegas
$62 Roundtrip, just found
$62
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Jan 14 from Ontario to Las Vegas, returning Fri, Jan 23, priced at $62 just found
Frontier Airlines
Wed, Feb 11 - Fri, Feb 20
ONT
Ontario
LAS
Las Vegas
$63 Roundtrip, just found
$63
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Feb 11 from Ontario to Las Vegas, returning Fri, Feb 20, priced at $63 just found
Frontier Airlines
Fri, Feb 6 - Mon, Feb 9
ONT
Ontario
LAS
Las Vegas
$65 Roundtrip, found 1 hour ago
$65
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Feb 6 from Ontario to Las Vegas, returning Mon, Feb 9, priced at $65 found 1 hour ago
Frontier Airlines
Fri, Feb 6 - Sun, Feb 8
ONT
Ontario
LAS
Las Vegas
$68 Roundtrip, found 1 hour ago
$68
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Feb 6 from Ontario to Las Vegas, returning Sun, Feb 8, priced at $68 found 1 hour ago
Southwest Airlines
Tue, Feb 24 - Wed, Mar 4
ONT
Ontario
LAS
Las Vegas
$137 Roundtrip, found 3 hours ago
$137
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Tue, Feb 24 from Ontario to Las Vegas, returning Wed, Mar 4, priced at $137 found 3 hours ago
United
Tue, Jan 13 - Wed, Jan 14
ONT
Ontario
LAS
Las Vegas
$157 Roundtrip, found 1 hour ago
$157
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jan 13 from Ontario to Las Vegas, returning Wed, Jan 14, priced at $157 found 1 hour ago
Alaska Airlines
Tue, Feb 3 - Tue, Feb 10
ONT
Ontario
LAS
Las Vegas
$323 Roundtrip, found 5 hours ago
$323
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Tue, Feb 3 from Ontario to Las Vegas, returning Tue, Feb 10, priced at $323 found 5 hours ago
Delta
Tue, Feb 24 - Wed, Mar 4
ONT
Ontario
LAS
Las Vegas
$479 Roundtrip, found 3 hours ago
$479
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Feb 24 from Ontario to Las Vegas, returning Wed, Mar 4, priced at $479 found 3 hours ago

Find the cheapest month to fly from Ontario (ONT) to Las Vegas (LAS)

October is typically the cheapest month to fly

From $48 - $88 per traveler.

Alternative airports near Las Vegas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to McCarran Intl. LAS. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $101
LAS
McCarran Intl.
CheapestClosest
Average driving time to city center6 min
Flights from $101

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) cost?
Get a cheap one-way flight from $29 or cheap return flight from $58 from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
Traveling in January is a good way to save, as it's the cheapest month for flights between ONT and LAS. You'll usually find the lowest prices during the off-season.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
You can fly directly from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) on a Southwest Airlines flight.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
Frontier Airlines and Southwest Airlines are some popular carriers offering reasonable fares. Don't forget that flight prices from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) can vary based on demand, travel dates and how early you book. With Expedia's filter tool, you can easily find an ONT to LAS flight that suits your plans and budget.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
When jetting out of Los Angeles - Ontario Intl. Airport (ONT), you can choose from an average of 7 daily nonstop flights to Harry Reid Intl. Airport (LAS).
What are the most popular departure times for flights from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
The 6 AM departures from ONT to LAS see the highest demand. Greater demand means you'll likely pay more for these departures. If you want to save money, book during off-peak hours.
What day of the week has the most flights from ONT to LAS?
Friday has the most flights from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS). Consider jetting off on this day and you'll have the best chance of finding a schedule that works for you.
What is the earliest flight from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
The first flight of the day taking off from Los Angeles - Ontario Intl. Airport (ONT) is at around 6:05AM UTC-8. Hop on this flight and you'll touch down at Harry Reid Intl. Airport (LAS) at approximately 7:10AM UTC-8. The total flight duration is 1h 5m.
How long does it take to fly from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
Typically, it takes 1 hour and 7 minutes to fly the 200 mi from ONT to LAS.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
To avoid possible delays on the Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) route, aim to fly before 3 PM. Later departures have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Las Vegas from Los Angeles - Ontario Intl. Airport (ONT)?
Harry Reid Intl. Airport (LAS) is the only airport in Las Vegas with direct flights from Los Angeles - Ontario Intl. Airport (ONT). Compare your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS) last-minute?
Last-minute fares from ONT to LAS are generally more expensive. For the best prices, start searching for flights as early as possible. That said, if you can play around with your travel dates, it's possible to land a cheap ticket just before your departure.
Is it cheaper to book an ONT to LAS flight and hotel package?
Compared with arranging flights and hotels separately, booking an ONT to LAS flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place takes the hassle out of planning your trip. Simply pick your flights and select from our extensive range of stays, then customize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)?
You can usually cancel or reschedule your ONT to LAS flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$58
Distance
196 mi
Average flight time
1 hour 4 mins

Book with confidence

Ontario to Las Vegas Flights

The cheapest times to fly from Ontario to Las Vegas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Las Vegas are during the month of January. You can find some of the cheapest flights from Ontario to Las Vegas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Las Vegas

Sunday is one of the best days to book for cheap flights from Ontario to Las Vegas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Las Vegas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Las Vegas in 2026. You can also book with separate airlines for your outbound and return journeys, from $29 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Las Vegas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Las Vegas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Ontario to Las Vegas Flights

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