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Cheap flights from Ontario to Las Vegas from £44

ONT — LAS
29 Nov — 6 Dec1
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 5/1214:53 -
Nonstop1h 09m
Sun 6/1211:37 -
1 stop11h 46m
Deal found 27/10£76
Sun 13/1219:26 -
1 stop20h 44m
Sun 20/1207:46 -
Nonstop1h 05m
Deal found 29/10£78
Sun 22/1118:50 -
Nonstop1h 05m
Tue 24/1107:40 -
Nonstop1h 10m
Deal found 26/10£88
Tue 17/1106:30 -
2 stops13h 05m
Sun 22/1107:25 -
Nonstop1h 05m
Deal found 27/10£91
Sat 21/1120:05 -
Nonstop1h 00m
Mon 23/1107:10 -
1 stop5h 15m
Deal found 26/10£95
Thu 31/1217:00 -
Nonstop1h 05m
Thu 7/110:10 -
2 stops5h 25m
Deal found 29/10£99
Thu 31/1213:30 -
1 stop3h 45m
Wed 6/110:10 -
2 stops5h 25m
Deal found 28/10£106
Thu 12/1120:45 -
Nonstop1h 05m
Mon 16/1106:45 -
Nonstop1h 00m
Deal found 26/10£125
Fri 13/1120:45 -
Nonstop1h 05m
Sun 22/1105:30 -
1 stop5h 15m
Deal found 26/10£133

Find flight deals from Ontario to Las Vegas

Round-trip from

£76

One-way from

£44

Popular in

October

Cheapest in

February

Average price

£169
Frontier
  • Frontier
  • 5/12-6/12
  • 1 total stop
  • 12h 55m total
  • Ontario to Las Vegas
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Southwest
  • Southwest
  • 18/11-31/12
  • Nonstop
  • 1h 05m total
  • Ontario to Las Vegas
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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 return flight
Fastest return journey

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 5/12

10:30-11:35

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£44

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Mon 23/11

18:50-19:55

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£44

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 13/2

17:55-21:40

1 stop3h 45m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 21/11

18:45-23:25

1 stop4h 40m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sun 6/12

09:55-14:30

1 stop4h 35m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sun 13/12

12:10-15:40

1 stop3h 30m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Wed 3/2

13:50-19:15

1 stop5h 25m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£52

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Tue 10/11

05:55-11:15

1 stop5h 20m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£82

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Fri 13/11

05:00-08:20

1 stop3h 20m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£89

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Fri 29/1

09:00-10:05

Nonstop1h 05m

Las Vegas Harry Reid Intl

Sun 31/1

07:15-11:20

1 stop4h 05m

£95

Flights are sorted by cheapest return flights first.

Deals found on 26/10

Showing 1-10 of 21 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 return 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?

To ensure you get the cheapest price possible for a flight from Ontario to Las Vegas, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 £80). Flying from Ontario to Las Vegas in October is currently the most expensive (average of £169). 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?

It’s optimal to fly from Ontario to Las Vegas in the evening. By choosing this option you can save up to 90% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost for a return flight from Ontario to Las Vegas?

Airfare is below average for this route at the moment.

Ontario to Las Vegas flights typically cost between £91 and £164 in December.
The cheapest return price found within the last 5 days was £76 on Frontier (5 Dec–6 Dec).

Related info for your journey

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

    Flights from Ontario to Las Vegas Harry Reid Intl have been viewed 1 times in the past calendar month.

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

    Southwest can get you from Ontario to Las Vegas in just under 1h 05m. Your travel time will be generally consistent. The distance between Ontario and Las Vegas is about 197 mi. Generally, flights for this route are direct.

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

    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 Ontario to Las Vegas on time: Frontier (75%), Volaris (75%), Southwest (71%).

  • 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 holiday 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 £80). Flying from Ontario to Las Vegas in October is currently the most expensive (average of £169). 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
Furnace Creek
Henderson

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How does Cheapflights help users find flights from Ontario to Las Vegas?

Deals for Ontario to Las Vegas flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Las Vegas?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Las Vegas for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Las Vegas with no change fees?

Certainly. Search results for flights to Las Vegas from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Ontario to Las Vegas become cheaper?

Of course! You can now track prices for flights from Ontario to Las Vegas and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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