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Cheap Flights from Ontario International to Las Vegas

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Compare Ontario International to Las Vegas flight deals

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Flight deals from Ontario International to Las Vegas

Looking for a cheap last-minute deal or the best return flight from Ontario International to Las Vegas? Find the lowest prices on one-way and return tickets right here.
Las Vegas.Rs8,426 per passenger.Departing Wed, 10 Sep.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Wed, 10 Sep, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs8,426, select.
Las Vegas.Rs8,426 per passenger.Departing Wed, 20 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Wed, 20 Aug, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs8,426, select.
Las Vegas.Rs9,835 per passenger.Departing Tue, 7 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 7 Oct, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs9,835, select.
Las Vegas.Rs10,815 per passenger.Departing Tue, 17 Jun.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Tue, 17 Jun, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs10,815, select.
Las Vegas.Rs10,815 per passenger.Departing Tue, 1 Jul.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Tue, 1 Jul, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs10,815, select.
Las Vegas.Rs10,878 per passenger.Departing Tue, 27 May.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 27 May, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs10,878, select.
Las Vegas.Rs13,540 per passenger.Departing Tue, 18 Nov.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 18 Nov, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs13,540, select.
Las Vegas.Rs17,744 per passenger.Departing Sun, 16 Nov.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Sun, 16 Nov, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From Rs17,744, select.

Find the cheapest month to fly from Ontario International to Las Vegas

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Las Vegas flights are currently cheapest in August.
May
from Rs10,878
Jun
from Rs10,815
Jul
from Rs10,815
Aug
from Rs8,426
Sep
from Rs8,426
Oct
from Rs9,835
Nov
from Rs13,540
Dec
from Rs32,258
Jan
from Rs37,791
Feb
Find prices
Mar
Find prices
Apr
Find prices

Direct flights from Ontario International to Las Vegas

Alternative Ontario International to Las Vegas routes

Looking for the cheapest, fastest or easiest route from Ontario International to Las Vegas? You could fly into the following airports instead.

Ontario to Las Vegas: Flight information

The things to know before you go.
Cheapest flight foundRs8,426
Cheapest month to flyAugust
Average flight time1 hr, 8 mins
Most popular airlineSouthwest Airlines
Average flights per week52

Finding cheap flights from Ontario International to Las Vegas: Frequently asked questions

There are 4 airports in Las Vegas: Las Vegas North Air Terminal, Las Vegas Harry Reid International, Las Vegas Henderson Sky Harbor, and Boulder City.
The best price we found for a return flight from Ontario International to Las Vegas is Rs16,887. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 8 minutes is the average flight time from Ontario International to Las Vegas.
Southwest Airlines, Frontier Airlines and Volaris fly direct from Ontario International to Las Vegas.
As of May 2025, there are 52 flights per week flying from Ontario International to Las Vegas.
The cheapest month to fly from Ontario International to Las Vegas is usually May 2025.
If you're flying from Ontario International Airport, the cheapest airport near Las Vegas is Las Vegas Harry Reid International – which is 4.3 km away from the centre of Las Vegas. We've found flights into this airport from Rs16,887.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Las Vegas on Wednesday, 3 September 2025.
Yes – the average flight time is 1 hour and 8 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Las Vegas but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Las Vegas is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 21°C. July is typically the warmest month in Las Vegas, when it usually averages around 37°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging -0°C. The rainiest month is February.
Currently, Frontier Airlines offers the cheapest flight tickets to Las Vegas.

Flying from Ontario International Airport (ONT) to Las Vegas: what you need to know

  • Approximately 1 hour 5 minutes is how long you can expect to be travelling on a direct flight from Ontario International Airport to Las Vegas.

  • Ontario (the location of Ontario International Airport) and Las Vegas are in the same timezone — UTC-7.

  • The most popular route is from Ontario International Airport (ONT) to Harry Reid Airport (formerly McCarran Airport) (LAS). You can select from 26 weekly services between these two airports. If you want to get on your way as soon as you can, the earliest flight from ONT to LAS is the 05:25 Southwest Airlines option. If you prefer to travel later, the final departure is at 22:21 with Frontier Airlines.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This leaves you with plenty of time to catch your ONT to Las Vegas flight.

  • Longer lines at check-in and security are likely if you're travelling during high season, so allow a bit more breathing room. A good rule of thumb for peak periods? Get there up to four hours early for international flights and at least two hours for domestic departures.

  • Begin your journey at ONT and fly nonstop to Harry Reid Airport (formerly McCarran Airport) (LAS). That's where you can expect to touch down when searching for Ontario International Airport to Las Vegas tickets.

  • Southwest Airlines is a leading airline that operates direct flights from Ontario International Airport to Las Vegas.

  • The journey from central Ontario to ONT takes around 1 hour 30 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 5 kilometres in 10 minutes or so, depending on traffic conditions.

  • Catching an early flight from Ontario International Airport to Las Vegas? Avoid the hassle of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels close to ONT:

  • Ontario International Airport gets high marks for on-time performance. 83.6% of flights that depart ONT reach their destination without delay.

  • ONT is located at 2900 E. Airport Drive.

How to find the cheapest flights from Ontario International Airport (ONT) to Las Vegas

  • Rs8,426 is currently the best price for a one-way Ontario International Airport to Las Vegas flight. Return flight tickets start at Rs16,887. These fares may change depending on demand and availability.

  • To snag cheap flights from ONT to Las Vegas, reserve your journey one month before your departure.

  • May is the best month for landing an amazing deal on Ontario International Airport to Las Vegas tickets. If you're looking to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • You don't need to keep checking in to find out if fares have dropped when you set up a Price Alert. We'll update you the moment there's an updated deal for cheap flights from ONT to Las Vegas.

  • Save money on your flight from Ontario International Airport to Las Vegas with the help of our filters. Select your ideal departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Las Vegas

Harry Reid Airport (formerly McCarran Airport) (LAS)

  • The distance from Harry Reid Airport (formerly McCarran Airport) (LAS) to central Las Vegas is roughly 19 kilometres. It takes about 15 minutes to reach the centre driving.

  • Travelling by public transport takes around 1 hour.

  • The last thing you need is a lengthy journey to your hotel if you're arriving on a late flight from Ontario International Airport to Las Vegas. Check in to one of these accommodation options near LAS instead:

  • Pick up a Harry Reid Airport (formerly McCarran Airport) rental car and explore Las Vegas and beyond with your own set of wheels. Dollar, Thrifty and Alamo are top providers you can book with here.

  • To lock in the lowest price, reserve your vehicle from Harry Reid Airport (formerly McCarran Airport) about one week in advance of your flight from ONT to Las Vegas.

  • You'll find LAS at 5757 Wayne Newton Boulevard.

Best time to go to Las Vegas

  • Carefully consider your dates before securing your flight from Ontario International Airport to Las Vegas. The city comes alive in peak season, but prices are generally higher and attractions can be busy. Go to Las Vegas in the off-season if you prefer a more relaxed vibe.

  • Before booking an Ontario International Airport to Las Vegas flight ticket, think about the weather you're most comfortable in. July is the warmest month in Las Vegas, with temperatures ranging from 23ºC to 42ºC.

  • Look for cheap tickets from ONT to Las Vegas in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC and 13ºC on average.

More about Las Vegas

  • Start your Las Vegas trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from Ontario International Airport to Las Vegas, explore our selection of hotels including:

  • Every great holiday has to include some sightseeing. Fountains of Bellagio, Las Vegas Strip and Fremont Street Experience are must-do's during your Las Vegas adventure.

Explore more of United States

  • You've visited Las Vegas, now it's time to discover other corners of United States. Travel around 370 kilometres south-west to Los Angeles to tick off its top sights. From Griffith Observatory to The Broad and La Brea Tar Pits & Museum, your itinerary will be busy.

  • Around 418 kilometres south-east of Las Vegas, Phoenix is another essential stop in United States. Start your sightseeing at Desert Botanical Garden, Heard Museum and Papago Park.

Plan the rest of your trip from Ontario to Las Vegas

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.