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Cheap Flights from Ontario International to Las Vegas

Compare Ontario International to Las Vegas flight deals

Find the cheapest month or even day of the year to fly to Las Vegas

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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 Airport to Las Vegas? If you want to travel next month, return fares start from R 963. Find the lowest prices on one-way and return tickets right here.
Las Vegas.R 477 per passenger.Departing Tue, 6 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 6 Oct, arriving in Harry Reid International.Price includes taxes and charges.From R 477, select.
Las Vegas.R 509 per passenger.Departing Tue, 15 Sep.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 15 Sep, arriving in Harry Reid International.Price includes taxes and charges.From R 509, select.
Las Vegas.R 534 per passenger.Departing Wed, 8 Jul.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Wed, 8 Jul, arriving in Harry Reid International.Price includes taxes and charges.From R 534, select.
Las Vegas.R 540 per passenger.Departing Tue, 11 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 11 Aug, arriving in Harry Reid International.Price includes taxes and charges.From R 540, select.
Las Vegas.R 540 per passenger.Departing Tue, 30 Jun.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Tue, 30 Jun, arriving in Harry Reid International.Price includes taxes and charges.From R 540, select.
Las Vegas.R 585 per passenger.Departing Wed, 18 Nov.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Wed, 18 Nov, arriving in Harry Reid International.Price includes taxes and charges.From R 585, select.
Las Vegas.R 2,215 per passenger.Departing Tue, 22 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 22 Dec, arriving in Harry Reid International.Price includes taxes and charges.From R 2,215, select.
Las Vegas.R 2,218 per passenger.Departing Tue, 22 Dec.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Tue, 22 Dec, arriving in Harry Reid International.Price includes taxes and charges.From R 2,218, select.
Las Vegas.R 2,222 per passenger.Departing Wed, 21 Apr.One-way flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Ontario International on Wed, 21 Apr, arriving in Harry Reid International.Price includes taxes and charges.From R 2,222, select.
Las Vegas.R 2,295 per passenger.Departing Wed, 20 Jan.One-way flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Ontario International on Wed, 20 Jan, arriving in Harry Reid International.Price includes taxes and charges.From R 2,295, select.
Las Vegas.R 2,315 per passenger.Departing Tue, 9 Mar.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 9 Mar, arriving in Harry Reid International.Price includes taxes and charges.From R 2,315, select.
Las Vegas.R 2,315 per passenger.Departing Wed, 10 Feb.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 10 Feb, arriving in Harry Reid International.Price includes taxes and charges.From R 2,315, select.
Las Vegas.R 2,318 per passenger.Departing Tue, 5 Jan.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Tue, 5 Jan, arriving in Harry Reid International.Price includes taxes and charges.From R 2,318, select.
Las Vegas.R 2,318 per passenger.Departing Wed, 10 Feb.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Wed, 10 Feb, arriving in Harry Reid International.Price includes taxes and charges.From R 2,318, select.
Las Vegas.R 2,318 per passenger.Departing Tue, 9 Mar.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Tue, 9 Mar, arriving in Harry Reid International.Price includes taxes and charges.From R 2,318, 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 October.
Jun
from R 540
Jul
from R 534
Aug
from R 540
Sep
from R 509
Oct
from R 477
Nov
from R 585
Dec
from R 2,215
Jan
from R 2,295
Feb
from R 2,315
Mar
from R 2,315
Apr
from R 2,222
May
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.

North Las Vegas

2km from central Las Vegas
Closest
Search flights

Harry Reid International

4km from central Las Vegas
Cheapest
from R 477
Search flights

Henderson Executive

17km from central Las Vegas
Search flights

Boulder City Municipal

34km from central Las Vegas
Search flights

Ontario to Las Vegas: Flight information

The things to know before you go.
Cheapest flight foundR 477
Cheapest month to flyOctober
Average flight time1 hr, 8 mins
Most popular airlineSouthwest Airlines
Average flights per week50

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

There are 4 airports in Las Vegas: North Las Vegas, Harry Reid International, Henderson Executive, and Boulder City Municipal.
The best price we found for a return flight from Ontario International to Las Vegas is R 916. 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 June 2026, there are 50 flights per week flying from Ontario International to Las Vegas.
The cheapest month to fly from Ontario International to Las Vegas is usually September.
If you're flying from Ontario International Airport, the cheapest airport near Las Vegas is Harry Reid International – which is 4.3 km away from the centre of Las Vegas. We've found flights into this airport from R 916.
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, 30 September 2026.
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 June, the average temperature is usually around 26°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.

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

  • Take a direct flight from Ontario International Airport to Las Vegas and you'll be in the air for an average of 1 hour 5 minutes.

  • Las Vegas and Ontario (where Ontario International Airport is located) are both in the UTC-8 timezone. That means there's no time difference to consider.

  • With 29 flights a week between the two airports, Ontario International Airport (ONT) to Las Vegas Harry Reid International Airport (LAS) is the most popular route. Southwest Airlines operates the earliest flight at 05:25. If you'd like to get more out of your day before leaving, the latest departure from ONT to LAS is with Frontier Airlines at 22:21.

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

  • During popular months such as July, it's wise to get to the airport earlier than usual. Arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during a peak period in general.

  • You can book a direct Ontario International Airport to Las Vegas ticket. Start your trip at ONT and end it at Las Vegas Harry Reid International Airport (LAS).

  • Southwest Airlines is a well-known carrier that offers direct flights from Ontario International Airport to Las Vegas.

  • Located around 5 kilometres from the centre of Ontario, ONT can be reached in about 15 minutes by car. The journey on public transport takes roughly 45 minutes.

  • Want a leisurely start to your journey? Stay near ONT. Whether you have an early flight from Ontario International Airport to Las Vegas or don't want departure day to feel hectic, these hotels put convenience first:

  • Ontario International Airport maintains a strong on-time performance, so you're less likely to experience disruptions. Departures from ONT arrive at their destination as scheduled 83% of the time.

  • ONT is located at 2900 E. Airport Drive.

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

  • R 477 is the cheapest price we've seen for a one-way Ontario International Airport to Las Vegas flight. A return ticket right now is R 916. Depending on when you want to go and the availability, these fares may change.

  • To find cheap flights from ONT to Las Vegas, book ahead. Airlines usually offer their most competitively priced fares when flights first go on sale.

  • If you're flexible with your travel plans, use the 'Whole month' tool. It'll give you the lowest price across every month when looking for a Ontario International Airport to Las Vegas ticket.

  • Locking in a cheap flight from ONT to Las Vegas is easy with Price Alerts. All you need to do is set up one of these automatic notifications and we'll let you know as soon as there's a better deal.

  • Tailor your trip with filters. Select your departure and arrival times, airlines and total journey duration. You can also sort the results by 'Cheapest,' 'Fastest' or 'Best' flights from Ontario International Airport to Las Vegas.

Airports in Las Vegas

Las Vegas Harry Reid International Airport (LAS)

  • Las Vegas Harry Reid International Airport (LAS) to central Las Vegas takes about 10 minutes to reach by car. The centre is roughly 8 kilometres away.

  • If you're taking public transport, expect a journey time of about 25 minutes.

  • If you're arriving on a late flight from Ontario International Airport to Las Vegas, few things beat the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and snoozing not long after at one of these accommodation options near LAS:

  • Lock in the lowest price by reserving your vehicle from Las Vegas Harry Reid International Airport around one week before your flight from ONT to Las Vegas.

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

Best time to go to Las Vegas

  • December is the quietest month for flights from Ontario International Airport to Las Vegas, while March is the most popular. Work out the ideal time to go to Las Vegas based on whether you want a lively atmosphere or a more laid-back vibe.

  • The warmest month in Las Vegas is July, with temperatures ranging between 23ºC (73ºF) and 43ºC (109ºF). Lock in your Ontario International Airport to Las Vegas plane ticket then if that's the weather you find most pleasant.

  • January has average temperatures of between 0ºC (32ºF) and 16ºC (61ºF). Search for a cheap ticket from ONT to Las Vegas around that time if you want to travel when it's cooler.

More about Las Vegas

  • When it comes to looking for somewhere to lay your head, you'll find the best places to stay in Las Vegas right here. Explore these hotels once you've booked your flight from Ontario International Airport to Las Vegas:

  • Las Vegas Strip and Ciudad del Pecado o Las Vegas are a couple of popular attractions to add to your Las Vegas must-do list. Keep the sightseeing going at Fountains of Bellagio.

Explore more of the United States

  • Los Angeles is just one of the many places in the United States waiting to be discovered after you've experienced Las Vegas. Around 370 kilometres away to the southwest, popular attractions include Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • Around 418 kilometres southeast of Las Vegas, Phoenix is another essential stop in the United States. Experience this destination's highlights firsthand at Camelback Mountain, Yayoi Kusama Fireflies Infinity Mirror Room and Heard Museum.

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 12 days.