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Cheap flights from Las Vegas to Ontario from C$ 103

LAS — ONT
27 Oct — 3 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Las Vegas to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Las Vegas to Ontario

Sat 17/108:00 a.m. -
Nonstop1h 09m
Mon 19/108:35 p.m. -
Nonstop1h 08m
Deal found 24/9C$ 181
Fri 13/113:13 p.m. -
Nonstop1h 08m
Tue 17/115:07 p.m. -
Nonstop1h 11m
Deal found 22/9C$ 208
Sun 18/105:45 a.m. -
1 stop6h 33m
Tue 20/104:03 p.m. -
1 stop4h 44m
Deal found 22/9C$ 281
Sun 18/105:45 a.m. -
1 stop6h 33m
Wed 21/1011:10 a.m. -
1 stop7h 21m
Deal found 22/9C$ 308
Fri 13/113:35 p.m. -
Nonstop1h 05m
Mon 16/113:20 p.m. -
Nonstop1h 10m
Deal found 22/9C$ 332
Sun 25/106:00 a.m. -
1 stop6h 29m
Sun 1/116:00 a.m. -
1 stop4h 25m
Deal found 25/9C$ 337
Wed 14/108:10 a.m. -
2 stops5h 15m
Sat 17/1011:30 a.m. -
1 stop6h 05m
Deal found 22/9C$ 342
Wed 21/103:45 p.m. -
2 stops5h 35m
Sat 24/105:30 a.m. -
1 stop4h 45m
Deal found 26/9C$ 368
Fri 27/115:30 a.m. -
1 stop5h 15m
Fri 27/114:00 p.m. -
1 stop3h 10m
Deal found 22/9C$ 386

Find flight deals from Las Vegas to Ontario

Round-trip from

C$ 181

One-way from

C$ 103

Popular in

June

Cheapest in

January

Average price

C$ 187
Frontier
  • Frontier
  • 17/10-19/10
  • Nonstop
  • 2h 17m total
  • Las Vegas to Ontario
Search Deals
Frontier
  • Frontier
  • 26/10-31/12
  • Nonstop
  • 1h 04m total
  • Las Vegas to Ontario
Search Deals
Highest demand for flights based on searches. 31% potential increase in price (C$ 169 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 27 potential savings vs. average RT price).
Search Deals
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 Las Vegas to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Sun 15/11

6:00 a.m.-12:29 p.m.

1 stop6h 29m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 205

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Thu 15/10

6:40 a.m.-12:14 p.m.

1 stop5h 34m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 205

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Mon 21/12

7:00 a.m.-11:58 a.m.

1 stop4h 58m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 232

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Tue 5/1

1:45 p.m.-8:20 p.m.

1 stop6h 35m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 232

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Mon 19/10

7:15 a.m.-12:18 p.m.

1 stop5h 03m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 232

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Tue 12/1

11:08 a.m.-3:27 p.m.

1 stop4h 19m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 232

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Sat 2/1

5:51 p.m.-10:53 p.m.

1 stop5h 02m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 247

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Fri 27/11

6:00 a.m.-12:29 p.m.

1 stop6h 29m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 257
Quickest round-trip

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Sun 18/10

8:00 a.m.-9:05 a.m.

Nonstop1h 05m

Ontario

Wed 31/12

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

Nonstop0h 00m

C$ 276

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Wed 28/10

6:00 a.m.-12:29 p.m.

1 stop6h 29m

Ontario

Sun 1/11

6:00 a.m.-12:25 p.m.

1 stop6h 25m

C$ 281

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/9

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Las Vegas to Ontario

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

Cheapflights Insights

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

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

The best time to book flights from Las Vegas to Ontario is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of C$ 110). Flying from Las Vegas to Ontario in June is currently the most expensive (average of C$ 467). 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 LAS to ONT?

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from Las Vegas to Ontario by exploring options for tickets in the afternoon.

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

Airfare is typical for this route at the moment.

Las Vegas to Ontario flights typically cost between C$ 103 and C$ 338 in October.
The cheapest round-trip price found within the last 5 days was C$ 181 on Frontier (17 Oct-19 Oct).

Related info for your journey

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

    Airlines like Southwest and United Airlines fly from Las Vegas to Ontario in about 5h 35m. The time it takes to get you to your destination can typically vary by up to 1h. The distance from Las Vegas to Ontario 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 Las Vegas to Ontario?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Las Vegas to Ontario on time: Frontier (76%), Volaris (76%), Southwest (72%).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Las Vegas to Ontario 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 Las Vegas to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of C$ 110). Flying from Las Vegas to Ontario in June is currently the most expensive (average of C$ 467). 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

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Alternative routes for Las Vegas to Ontario

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