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Cheap flights from Ontario to Las Vegas from £61

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

Sun 1/1114:23 -
Nonstop1h 08m
Fri 6/1110:05 -
Nonstop1h 11m
Deal found 13/9£113
Fri 30/1020:35 -
Nonstop1h 09m
Thu 5/1115:17 -
1 stop4h 11m
Deal found 15/9£119
Wed 28/1017:07 -
Nonstop1h 11m
Wed 4/1116:35 -
1 stop26h 53m
Deal found 13/9£119
Wed 14/1016:15 -
Nonstop1h 05m
Sat 17/1007:40 -
Nonstop1h 05m
Deal found 15/9£122
Thu 24/908:00 -
Nonstop1h 02m
Thu 24/915:45 -
Nonstop1h 14m
Deal found 11/9£124
Mon 12/1021:30 -
Nonstop1h 10m
Mon 19/1021:15 -
Nonstop1h 00m
Deal found 14/9£127
Thu 15/1021:30 -
Nonstop1h 10m
Fri 16/1009:10 -
1 stop4h 05m
Deal found 13/9£129
Fri 9/1008:00 -
Nonstop1h 08m
Sun 11/1010:03 -
Nonstop1h 13m
Deal found 12/9£130
Fri 9/1021:30 -
Nonstop1h 10m
Fri 16/1021:15 -
Nonstop1h 00m
Deal found 11/9£133
Tue 13/1016:15 -
Nonstop1h 05m
Tue 20/1008:10 -
2 stops5h 15m
Deal found 13/9£133
Thu 15/1006:00 -
1 stop3h 25m
Thu 22/1007:25 -
1 stop4h 35m
Deal found 14/9£136

Find flight deals from Ontario to Las Vegas

Round-trip from

£113

One-way from

£61

Popular in

August

Cheapest in

February

Average price

£153
Frontier
  • Frontier
  • 1/11-6/11
  • Nonstop
  • 2h 19m total
  • Ontario to Las Vegas
Search Deals
Southwest
  • Southwest
  • 16/10-31/12
  • Nonstop
  • 1h 10m total
  • Ontario to Las Vegas
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£21 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

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

Fly from

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Route

Depart

Return

Price

Cheapest return flight

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 7/1

07:40-10:55

1 stop3h 15m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£80

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Fri 9/10

21:30-22:40

Nonstop1h 10m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£87

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 14/11

13:10-19:10

2 stops6h 00m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£89
Fastest return journey

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Tue 5/1

08:40-09:40

Nonstop1h 00m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£101

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Sat 20/2

13:00-19:04

1 stop6h 04m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£113

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Thu 7/1

05:00-17:56

2 stops12h 56m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£117

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Mon 5/10

15:00-19:05

1 stop4h 05m

Las Vegas Harry Reid Intl

Fri 9/10

21:15-22:15

Nonstop1h 00m

£129

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Fri 26/2

07:00-11:50

2 stops4h 50m

Las Vegas Harry Reid Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£133

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Tue 13/10

21:00-22:05

Nonstop1h 05m

Las Vegas Harry Reid Intl

Tue 20/10

08:00-12:00

1 stop4h 00m

£140

OntarioLas Vegas

ONT Ontario - LAS Las Vegas Harry Reid Intl

ONTLAS

Ontario

Wed 14/10

15:10-19:35

1 stop4h 25m

Las Vegas Harry Reid Intl

Sat 17/10

05:50-13:45

1 stop7h 55m

£141

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 23 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 57 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 £81). Flying from Ontario to Las Vegas in August is currently the most expensive (average of £162). 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 typical for this route at the moment.

Ontario to Las Vegas flights typically cost between £102 and £204 in November.
The cheapest return price found within the last 5 days was £113 on Frontier (1 Nov–6 Nov).

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 and United Airlines can get you from Ontario to Las Vegas in just under 4h 25m. Your travel time can differ by up to 14m. The distance between Ontario and Las Vegas is about 197 mi. 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?

    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 (65%), Volaris (65%), Southwest (64%).

  • 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 £81). Flying from Ontario to Las Vegas in August is currently the most expensive (average of £162). 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

Browse thousands of different options on Cheapflights for your next trip

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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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