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Cheap flights from Ontario to Las Vegas from C$ 89

ONT — LAS
15 Oct — 22 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Las Vegas

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Las Vegas

Sat 17/105:25 p.m. -
Nonstop1h 13m
Mon 19/106:30 a.m. -
1 stop13h 10m
Deal found 10/9C$ 172
Wed 14/104:15 p.m. -
Nonstop1h 05m
Sat 17/107:40 a.m. -
Nonstop1h 05m
Deal found 15/9C$ 228
Mon 12/109:30 p.m. -
Nonstop1h 10m
Mon 19/109:15 p.m. -
Nonstop1h 00m
Deal found 14/9C$ 239
Thu 15/109:30 p.m. -
Nonstop1h 10m
Fri 16/109:10 a.m. -
1 stop4h 05m
Deal found 13/9C$ 242
Fri 9/109:30 p.m. -
Nonstop1h 10m
Fri 16/109:15 p.m. -
Nonstop1h 00m
Deal found 11/9C$ 249
Tue 13/104:15 p.m. -
Nonstop1h 05m
Tue 20/108:10 a.m. -
2 stops5h 15m
Deal found 13/9C$ 250
Thu 15/106:00 a.m. -
1 stop3h 25m
Thu 22/107:25 a.m. -
1 stop4h 35m
Deal found 14/9C$ 256
Mon 12/109:30 p.m. -
Nonstop1h 10m
Wed 14/108:10 a.m. -
2 stops5h 15m
Deal found 14/9C$ 260
Sat 10/104:20 p.m. -
1 stop5h 05m
Mon 12/1010:55 p.m. -
Nonstop1h 00m
Deal found 12/9C$ 263
Mon 5/103:00 p.m. -
1 stop4h 05m
Fri 9/108:10 p.m. -
1 stop3h 40m
Deal found 14/9C$ 265

Find flight deals from Ontario to Las Vegas

Round-trip from

C$ 172

One-way from

C$ 89

Popular in

August

Cheapest in

February

Average price

C$ 286
Frontier
  • Frontier
  • 17/10-19/10
  • 1 total stop
  • 14h 23m total
  • Ontario to Las Vegas
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Frontier
  • Frontier
  • 19/10-31/12
  • Nonstop
  • 1h 08m total
  • Ontario to Las Vegas
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 76 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 10 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Las Vegas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 7/1

7:40 a.m.-10:55 a.m.

1 stop3h 15m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 150

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Mon 18/1

6:35 p.m.-10:05 p.m.

1 stop3h 30m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 181

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Tue 27/10

6:00 a.m.-10:20 a.m.

1 stop4h 20m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 188

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 8/10

6:07 a.m.-12:28 p.m.

1 stop6h 21m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 188
Quickest round-trip

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Mon 5/10

5:15 p.m.-6:20 p.m.

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 193

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Wed 20/1

1:00 p.m.-8:19 p.m.

1 stop7h 19m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 213

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 20/2

1:33 p.m.-6:46 p.m.

1 stop5h 13m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 213

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 7/1

5:00 a.m.-5:56 p.m.

2 stops12h 56m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 220

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 25/2

6:53 p.m.-1:06 a.m.

1 stop6h 13m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 221

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Fri 1/1

1:38 p.m.-8:42 p.m.

1 stop7h 04m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 240

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Las Vegas

How far ahead should I book a flight from Ontario to Las Vegas?

Booking 57 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Las Vegas. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Las Vegas?

Currently, February is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of C$ 151). Flying from Ontario to Las Vegas in August is currently the most expensive (average of C$ 303). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to LAS?

One of the essential ways to save on airfare from Ontario to Las Vegas is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 70% on airfare.

How much does it cost to fly round-trip from Ontario to Las Vegas?

Airfare is below average for this route at the moment.

Ontario to Las Vegas flights typically cost between C$ 192 and C$ 383 in October.
The cheapest round-trip price found within the last 5 days was C$ 172 on Frontier (17 Oct-19 Oct).

Related info for your journey

  • How popular is this Ontario to Las Vegas flight route?

    This flight path from Ontario to Las Vegas Harry Reid Intl was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ontario to Las Vegas?

    A quick flight from Ontario to Las Vegas can take about 3h 30m. Southwest provides one of the quickest options available for as low as C$ 349. The distance from Ontario to Las Vegas is about 317 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Ontario to Las Vegas?

    Consider Frontier (65%), Volaris (65%) or Southwest (64%) when booking your flight. These represent the most reliable airlines when flying from Ontario to Las Vegas.

  • Can I find deals for flights from Ontario to Las Vegas that include hotel bookings?

    Yes. In addition to deals on Ontario to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Las Vegas?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Las Vegas.

  • Can I find deals for business class flights from Ontario to Las Vegas?

    Yes. Cheapflights offers flight deals from Ontario to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Las Vegas?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of C$ 151). Flying from Ontario to Las Vegas in August is currently the most expensive (average of C$ 303). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Paradise
Kingman
North Las Vegas
Henderson

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Las Vegas

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Not ready to book yet? You can track prices for flights from Ontario to Las Vegas on Cheapflights with our Price Alert feature and get notified when better prices are available.

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