$34 Cheap Flights from Las Vegas (LAS) to Ontario (ONT)

View $34 flight on Wed, Aug 6, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $34 for one-way flights and $68 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Jul 26 - Sat, Aug 2
LAS
Las Vegas
ONT
Ontario
$68 Roundtrip, just found
$68
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Jul 26 from Las Vegas to Ontario, returning Sat, Aug 2, priced at $68 just found
Frontier Airlines
Tue, Jul 22 - Tue, Jul 29
LAS
Las Vegas
ONT
Ontario
$73 Roundtrip, just found
$73
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, Jul 22 from Las Vegas to Ontario, returning Tue, Jul 29, priced at $73 just found
Frontier Airlines
Thu, Jul 31 - Sat, Aug 2
LAS
Las Vegas
ONT
Ontario
$78 Roundtrip, found 8 hours ago
$78
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Jul 31 from Las Vegas to Ontario, returning Sat, Aug 2, priced at $78 found 8 hours ago
Frontier Airlines
Fri, Aug 22 - Sun, Aug 24
LAS
Las Vegas
ONT
Ontario
$78 Roundtrip, just found
$78
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 22 from Las Vegas to Ontario, returning Sun, Aug 24, priced at $78 just found
Frontier Airlines
Mon, Jul 28 - Tue, Aug 5
LAS
Las Vegas
ONT
Ontario
$79 Roundtrip, found 16 hours ago
$79
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Mon, Jul 28 from Las Vegas to Ontario, returning Tue, Aug 5, priced at $79 found 16 hours ago
Southwest Airlines
Sat, Oct 18 - Sun, Oct 19
LAS
Las Vegas
ONT
Ontario
$83 Roundtrip, just found
$83
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Oct 18 from Las Vegas to Ontario, returning Sun, Oct 19, priced at $83 just found
Frontier Airlines
Fri, Aug 8 - Sat, Aug 9
LAS
Las Vegas
ONT
Ontario
$83 Roundtrip, found 1 hour ago
$83
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Aug 8 from Las Vegas to Ontario, returning Sat, Aug 9, priced at $83 found 1 hour ago
United
Sun, Nov 2 - Thu, Nov 6
LAS
Las Vegas
ONT
Ontario
$285 Roundtrip, found 1 hour ago
$285
Roundtrip
found 1 hour ago
Select United flight, departing Sun, Nov 2 from Las Vegas to Ontario, returning Thu, Nov 6, priced at $285 found 1 hour ago
Delta
Tue, Nov 11 - Sat, Nov 15
LAS
Las Vegas
ONT
Ontario
$325 Roundtrip, found 1 hour ago
$325
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Nov 11 from Las Vegas to Ontario, returning Sat, Nov 15, priced at $325 found 1 hour ago
Alaska Airlines
Thu, Aug 14 - Tue, Aug 19
LAS
Las Vegas
ONT
Ontario
$356 Roundtrip, found 1 day ago
$356
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Aug 14 from Las Vegas to Ontario, returning Tue, Aug 19, priced at $356 found 1 day ago

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

March is typically the cheapest month to fly

From $48 - $104 per traveler.

Graph displaying average flight prices per month

Alternative airports near Ontario

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

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $54
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $54
Flights from Las Vegas (LAS) to Ontario (ONT)
Origin airport
Harry Reid Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$62
Distance
196 mi
Average flight time
1 hour 5 mins

Las Vegas to Ontario Flights

The cheapest times to fly from Las Vegas to Ontario

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 Las Vegas to Ontario are during the month of July. You can find some of the cheapest flights from Las Vegas to Ontario with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Las Vegas to Ontario: 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 Las Vegas to Ontario

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 Las Vegas to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $34 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 Las Vegas to Ontario 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 Las Vegas to Ontario 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.

 

Frequently asked questions

How much does a flight from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT) cost?
You can pick up cheap return fares starting at $59 from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines and Spirit Airlines flight leaving LAS on July 26 2025 and touching down at ONT. The price was last updated on July 12 2025 and has not changed since.
What is the cheapest month to fly from LAS to ONT?
The cheapest flights from LAS to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
You can travel nonstop from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT) on a Southwest Airlines flight.
What is the cheapest airline that flies from LAS to ONT?
Travel from LAS to ONT with Frontier Airlines. This carrier currently has the cheapest one-way fare for this route, starting from $34. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from LAS on September 24 2025. Prices were last updated on July 12 2025 and have not changed since.
How many flights per day from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
With, on average, 7 direct flights departing from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT) each day, you'll be on your way in no time.
What are the most popular departure times for flights from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
The 6 AM departures from LAS to ONT see the highest demand. They can also be more expensive. If you're looking to save, book during off-peak hours.
What day of the week has the most flights from LAS to ONT?
Monday offers the most flights from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT). Consider traveling on this day and you'll have the best chance of finding a departure that fits your schedule.
What is the earliest flight from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
Harry Reid Intl. Airport (LAS)'s earliest flight to Los Angeles - Ontario Intl. Airport (ONT) takes off at approximately 6:00AM UTC-8. With a total travel time of 1h 6m, you'll arrive at around 7:06AM UTC-8.
How long does it take to fly from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
It usually takes 1 hour and 6 minutes to fly the 200 mi from LAS to ONT.
What airline has the least delays from LAS to ONT?
With 85% of flights typically arriving on time, Frontier Airlines has the best on-time performance for nonstop flights from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT). To keep track of your flight status and get notifications if anything changes, head to the Expedia App.
What is the best time to fly from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
To arrive at Los Angeles - Ontario Intl. Airport (ONT) without delays, pick a flight that takes off from Harry Reid Intl. Airport (LAS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Ontario from Harry Reid Intl. Airport (LAS)?
Arrive at one of these Ontario hubs following your direct flight from Harry Reid Intl. Airport (LAS):

  • Los Angeles Intl. Airport (LAX)
  • John Wayne Airport (SNA)
  • Bob Hope Airport (BUR)
  • Los Angeles - Ontario Intl. Airport (ONT)
  • Long Beach Municipal Airport (LGB)

Is it cheaper to buy a plane ticket from Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until just before your departure to book a ticket from LAS to ONT often results in higher prices. While you may come across some last-minute discounts, there's no guarantee. Be flexible with your itinerary to boost your chances of landing a bargain.
Is it cheaper to book a LAS to ONT flight and hotel package?
Compared with arranging hotels and flights separately, booking a LAS to ONT flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and choose 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 Harry Reid Intl. Airport (LAS) to Los Angeles - Ontario Intl. Airport (ONT)?
If you booked your LAS to ONT flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

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