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Cheap flights from Ontario to Las Vegas from $36

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Las Vegas departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Las Vegas

Cheap round-trip flights

Southwest Logo
9:35 pm - 10:40 pmONT-LAS
1h 05mnonstop
Southwest Logo
10:00 pm - 11:00 pmLAS-ONT
1h 00mnonstop
$71Southwest
Find Deal
Thu, Oct 9 - Thu, Oct 16
Frontier Logo
8:00 am - 9:12 amONT-LAS
1h 12mnonstop
Frontier Logo
7:33 pm - 8:42 pmLAS-ONT
1h 09mnonstop
$72Frontier
Find Deal
Tue, Nov 11 - Tue, Nov 11
Southwest Logo
9:05 pm - 10:10 pmONT-LAS
1h 05mnonstop
Southwest Logo
7:20 am - 8:25 amLAS-ONT
1h 05mnonstop
$73Southwest
Find Deal
Sun, Oct 5 - Wed, Oct 8
Frontier Logo
8:00 am - 9:11 amONT-LAS
1h 11mnonstop
Frontier Logo
8:49 pm - 9:56 pmLAS-ONT
1h 07mnonstop
$78Frontier
Find Deal
Wed, Sep 24 - Wed, Sep 24
Frontier Logo
8:00 am - 9:12 amONT-LAS
1h 12mnonstop
Frontier Logo
6:40 am - 7:47 amLAS-ONT
1h 07mnonstop
$79Frontier
Find Deal
Wed, Oct 15 - Fri, Oct 17
Frontier Logo
8:00 am - 9:12 amONT-LAS
1h 12mnonstop
Frontier Logo
8:00 am - 9:10 amLAS-ONT
1h 10mnonstop
$80Frontier
Find Deal
Tue, Nov 11 - Thu, Nov 13
Frontier Logo
8:00 am - 9:11 amONT-LAS
1h 11mnonstop
Frontier Logo
11:27 am - 12:43 pmLAS-ONT
1h 16mnonstop
$81Frontier
Find Deal
Sat, Oct 4 - Sat, Oct 4
Southwest Logo
9:10 pm - 10:15 pmONT-LAS
1h 05mnonstop
Southwest Logo
7:40 am - 8:45 amLAS-ONT
1h 05mnonstop
$82Southwest
Find Deal
Tue, Oct 14 - Fri, Oct 17
Frontier Logo
8:00 am - 9:11 amONT-LAS
1h 11mnonstop
Frontier Logo
7:45 pm - 8:56 pmLAS-ONT
1h 11mnonstop
$83Frontier
Find Deal
Tue, Sep 30 - Mon, Oct 6
Logo
9:46 pm - 8:05 amONT-LAS
10h 19m1 stop
Logo
8:49 pm - 9:56 pmLAS-ONT
1h 07mnonstop
$124
Find Deal
Thu, Oct 2 - Sat, Oct 4

Southwest flights from Ontario to Las Vegas

Our best Southwest deals on Ontario to Las Vegas flight tickets
Southwest
Oct 9
ONT9:35 pmOntario
1h 05m
LAS10:40 pmLas Vegas Harry Reid Intl
Oct 16
LAS10:00 pmLas Vegas Harry Reid Intl
1h 00m
ONT11:00 pmOntario
$71
Find similar
Southwest
Oct 5
ONT9:05 pmOntario
1h 05m
LAS10:10 pmLas Vegas Harry Reid Intl
Oct 8
LAS7:20 amLas Vegas Harry Reid Intl
1h 05m
ONT8:25 amOntario
$73
Find similar
Southwest
Oct 14
ONT9:10 pmOntario
1h 05m
LAS10:15 pmLas Vegas Harry Reid Intl
Oct 17
LAS7:40 amLas Vegas Harry Reid Intl
1h 05m
ONT8:45 amOntario
$82
Find similar

Frontier flights from Ontario to Las Vegas

Our best Frontier deals on Ontario to Las Vegas flight tickets
Frontier
Sep 25
ONT6:00 amOntario
1h 11m
LAS7:11 amLas Vegas Harry Reid Intl
Sep 25
LAS10:22 amLas Vegas Harry Reid Intl
1h 16m
ONT11:38 amOntario
$72
Find similar
Frontier
Sep 25
ONT6:00 amOntario
1h 11m
LAS7:11 amLas Vegas Harry Reid Intl
Oct 15
LAS7:33 pmLas Vegas Harry Reid Intl
1h 09m
ONT8:42 pmOntario
$76
Find similar
Frontier
Sep 24
ONT8:00 amOntario
1h 11m
LAS9:11 amLas Vegas Harry Reid Intl
Sep 24
LAS8:49 pmLas Vegas Harry Reid Intl
1h 07m
ONT9:56 pmOntario
$78
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Las Vegas that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 11, 2025.
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

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 10/9

9:35 pm-10:40 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Thu 10/16

10:00 pm-11:00 pm

Nonstop1h 00m

$71

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 11/11

8:00 am-9:12 am

Nonstop1h 12m

Las Vegas Harry Reid Intl

Tue 11/11

7:33 pm-8:42 pm

Nonstop1h 09m

$72

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 10/5

9:05 pm-10:10 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Wed 10/8

7:20 am-8:25 am

Nonstop1h 05m

$73

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 9/24

8:00 am-9:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Wed 9/24

8:49 pm-9:56 pm

Nonstop1h 07m

$78

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 10/15

8:00 am-9:12 am

Nonstop1h 12m

Las Vegas Harry Reid Intl

Fri 10/17

6:40 am-7:47 am

Nonstop1h 07m

$79

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 11/11

8:00 am-9:12 am

Nonstop1h 12m

Las Vegas Harry Reid Intl

Thu 11/13

8:00 am-9:10 am

Nonstop1h 10m

$80

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sat 10/4

8:00 am-9:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Sat 10/4

11:27 am-12:43 pm

Nonstop1h 16m

$81

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 10/14

9:10 pm-10:15 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Fri 10/17

7:40 am-8:45 am

Nonstop1h 05m

$82

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 9/30

8:00 am-9:11 am

Nonstop1h 11m

Las Vegas Harry Reid Intl

Mon 10/6

7:45 pm-8:56 pm

Nonstop1h 11m

$83

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 10/2

9:46 pm-8:05 am

1 stop10h 19m

Las Vegas Harry Reid Intl

Sat 10/4

8:49 pm-9:56 pm

Nonstop1h 07m

$124

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Las Vegas from

How to get the cheapest flight ticket from Ontario to Las Vegas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Las Vegas?

What is the cheapest month to fly to Las Vegas?

The month of October is, on average, the cheapest month to fly to Las Vegas from Ontario, with most prices found around $86. The month of September is another great option to travel to Las Vegas, with average flight prices from Ontario averaging around $93.

What is the cheapest day to depart on your flight to Las Vegas?

Our data shows that Tuesday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $140. Flights from Ontario to Las Vegas on a Thursday will generally be more expensive and average around $182. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Las Vegas?

The cheapest time of day to fly to Las Vegas is at noon when flights can be purchased for as low as $136. Flights to Las Vegas are more costly in the evening, with an average ticket price of $174. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ontario to Las Vegas Harry Reid Intl flight route?

Fly from Ontario to Las Vegas Harry Reid Intl for the best Ontario - Las Vegas Harry Reid Intl flight prices

How far in advance should I book a flight to Las Vegas?

You are more likely to see cheaper flights to Las Vegas from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $107 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Ontario for as low as $86 on momondo.

What cabin class options are available on Ontario to Las Vegas Harry Reid Intl flights?

There is only 1 cabin class available to choose from on Ontario to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Ontario to Las Vegas flight prices changed over time?

As of September 2025, prices for Ontario to Las Vegas flights are approximately 10% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Las Vegas

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Las Vegas according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Las Vegas (ONT to LAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Las Vegas

Best Price Found

$60

Fastest flight time

1h 00m

Direct flights

Every day

Airports in Las Vegas

1 airport
The best one-way flight to Las Vegas from Ontario in the past 72 hours is $60. The best round-trip flight deal from Ontario to Las Vegas found on momondo in the last 72 hours is $93.
The fastest flight from Ontario to Las Vegas takes 1h 00m
Direct flights go from Ontario to Las Vegas every day.
There is 1 airport near Las Vegas: Las Vegas Harry Reid Intl (LAS)
Search flight deals

  • How far is Ontario to Las Vegas Harry Reid Intl by plane?

    The distance between Ontario and Las Vegas Harry Reid Intl is about 203.5 mi. In terms of flight time, this usually takes a little over 1h 05m.

  • When did momondo last update prices for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport?

    Prices for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Las Vegas Harry Reid Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Las Vegas Harry Reid Intl Airport.

  • What documentation or ID do you need to fly to Las Vegas Harry Reid Intl Airport?

    The necessary travel and health documents for your Las Vegas Harry Reid Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to Las Vegas?

  • What is the most popular airline from Ontario to Las Vegas?

Best airlines flying from Ontario to Las Vegas

Compare and see reviews for airlines that fly from Ontario to Las Vegas with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $22Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
FrontierPriceFrom $46Free CancellationRating
5.8
3,177 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,248 reviews
Search Southwest flights

  • Southwest Flights From Ontario to Las Vegas

    Across 24 Southwest flights from Ontario to Las Vegas this week, the average price was $236, with the best Southwest deals starting from $97 round-trip. 4,248 users have rated Southwest on momondo, with an average score of 8.0/10.

  • Frontier Flights From Ontario to Las Vegas

    Frontier (5.8/10 from 3,177 reviews) operates around 11 flights from Ontario to Las Vegas in any given week. The average Frontier airfare for this route is around $101, with deals from around $46 rare but found on momondo. Referenced prices are for round-trip Ontario to Las Vegas flight searches in the last 72 hours.

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Laughlin
Mount Charleston
Henderson
Mesquite
North Las Vegas
Paradise
Kingman
Pahrump
Primm
Furnace Creek
Boulder City
Winchester
Sunrise Manor
Needles

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Las Vegas?

Finding the right flight to Las Vegas from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Las Vegas quick and easy, saving you time and money.

Can I find flights from Ontario to Las Vegas with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Las Vegas flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Las Vegas?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Las Vegas.

I’m not ready to book a flight from Ontario to Las Vegas right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Las Vegas from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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