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

View $29 flight on Tue, May 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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Find available prices by choosing your travel dates.

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

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
Sat, May 31 - Wed, Jun 4
LAS
Las Vegas
ONT
Ontario
$58 Roundtrip, just found
$58
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 31 from Las Vegas to Ontario, returning Wed, Jun 4, priced at $58 just found
Frontier Airlines
Tue, May 27 - Sat, May 31
LAS
Las Vegas
ONT
Ontario
$60 Roundtrip, found 1 hour ago
$60
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, May 27 from Las Vegas to Ontario, returning Sat, May 31, priced at $60 found 1 hour ago
Frontier Airlines
Tue, May 27 - Sat, May 31
LAS
Las Vegas
ONT
Ontario
$62 Roundtrip, found 1 hour ago
$62
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, May 27 from Las Vegas to Ontario, returning Sat, May 31, priced at $62 found 1 hour ago
Frontier Airlines
Sat, May 17 - Sun, May 18
LAS
Las Vegas
ONT
Ontario
$63 Roundtrip, just found
$63
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 17 from Las Vegas to Ontario, returning Sun, May 18, priced at $63 just found
Frontier Airlines
Mon, Jun 9 - Wed, Jun 11
LAS
Las Vegas
ONT
Ontario
$65 Roundtrip, just found
$65
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Jun 9 from Las Vegas to Ontario, returning Wed, Jun 11, priced at $65 just found
Frontier Airlines
Sat, May 31 - Wed, Jun 4
LAS
Las Vegas
ONT
Ontario
$68 Roundtrip, just found
$68
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 31 from Las Vegas to Ontario, returning Wed, Jun 4, priced at $68 just found
Southwest Airlines
Thu, May 22 - Mon, May 26
LAS
Las Vegas
ONT
Ontario
$77 Roundtrip, just found
$77
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, May 22 from Las Vegas to Ontario, returning Mon, May 26, priced at $77 just found
United
Tue, Jun 3 - Thu, Jun 5
LAS
Las Vegas
ONT
Ontario
$157 Roundtrip, found 2 days ago
$157
Roundtrip
found 2 days ago
Select United flight, departing Tue, Jun 3 from Las Vegas to Ontario, returning Thu, Jun 5, priced at $157 found 2 days ago
Alaska Airlines
Sat, May 10 - Tue, May 13
LAS
Las Vegas
ONT
Ontario
$321 Roundtrip, found 4 hours ago
$321
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Sat, May 10 from Las Vegas to Ontario, returning Tue, May 13, priced at $321 found 4 hours ago
Delta
Thu, Jul 24 - Mon, Jul 28
LAS
Las Vegas
ONT
Ontario
$325 Roundtrip, just found
$325
Roundtrip
just found
Select Delta flight, departing Thu, Jul 24 from Las Vegas to Ontario, returning Mon, Jul 28, priced at $325 just found

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 $54 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 May 6 2025 and touching down at ONT. The price was last updated on April 23 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 June 13 2025. Prices were last updated on April 23 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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