Cheap flights from Las Vegas to Ontario (LAS - ONT) from $19

This is the cheapest one-way flight price, found on 9/27. Prices may vary by date and flight preferences.
LAS — ONT
Oct 3 — Oct 101

The best prices from Las Vegas Harry Reid Intl to Ontario are usually found in May or December, booked 29 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

How to find the cheapest flight from Las Vegas (LAS) to Ontario (ONT)

All the information you need to plan the best LAS to ONT flight in 2023: compare Las Vegas to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

Popular in

February

Cheapest in

May

Round-trip from

$217

One-way from

$19
High demand for flights, 11% potential price rise
Best time to find cheap flights, 11% potential price drop
From Las Vegas Harry Reid Intl to Ontario
One-way flight from Las Vegas Harry Reid Intl to Ontario

LAS - LAX

Price

$217 - $494

LAX

Temperature

57.2 - 73.4 °F

LAX

Rainfall

0 - 3.4 inches

What is the cheapest day to fly round-trip from Las Vegas to Ontario?

Saturday flights are found to be more expensive to fly from Las Vegas to Ontario. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Ontario.

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

To save on the cost of your flight from Las Vegas to Ontario, book at least 16 days before your planned departure. Booking around this time can save you about 21% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $80 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $106.

What is the cheapest month to fly from Las Vegas to Ontario?

The best pricing can be found in the month of February. Prices to Ontario from Las Vegas average $94. You can even find prices in February for less than $94, as users have found deals to Ontario from as low as $51. The month of May appears to be one of the more expensive times to travel to Ontario from Las Vegas. Flying in the targeted month can save you up to 13%.

When is the cheapest time to fly from Las Vegas to Ontario (LAS - ONT)?

When flying from Las Vegas to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 20% versus a flight at noon.

Cheap Frontier flights from Las Vegas to Ontario

Peruse some of the lowest-priced Frontier flights we've found from Las Vegas to Ontario. It's recommended that users confirm their flight details before booking.

Cheap American Airlines flights from Las Vegas to Ontario

Take a gander at the lowest prices we've found on American Airlines flights from Las Vegas to Ontario. Make sure to examine the flight information before completing your reservation.

Cheap Las Vegas to Ontario flights in September & October 2023

The best prices found for LAS to ONT flights for September, October
Listed are some of the best fares we've found on flights departing from Las Vegas to Ontario in 2023. More deals are always being added, so be sure to check back regularly.

Las Vegas to Ontario 2023 flight deals

Cheap flights to Ontario from Las Vegas found for this year
Listed are some of the best fares we've found on flights departing from Las Vegas to Ontario in 2023. More deals are always being added, so be sure to check back regularly.

Non-stop flights to Ontario from Las Vegas

Save time with Las Vegas to Ontario direct flight deals
Consider booking one of these non-stop flights heading from Las Vegas to Ontario. If you're looking for other options for flights from Las Vegas to Ontario, make sure to update the search form at the top of page.

Las Vegas to Ontario flights leaving soon

Late deals on return flights to Ontario from Las Vegas, departing today and this week
Consider one of these great deals we found on last-minute flights from Las Vegas to Ontario. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Ontario from Las Vegas

The cheapest one-way flights from Las Vegas to Ontario
Users traveling one-way from Las Vegas to Ontario can select one of these great deals. For those needing a return trip from Las Vegas, there is a search form available above.

Find flights from Las Vegas to Ontario within your budget

Use the slider to find flights from Las Vegas to Ontario that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$38 - $90

Route

Depart

Return

Price

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 11/7

Nonstop1h 08m

Ontario

Sat 11/11

Nonstop1h 18m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sat 10/28

Nonstop1h 04m

Ontario

Mon 10/30

Nonstop1h 11m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sat 10/28

Nonstop1h 10m

Ontario

Sat 11/4

Nonstop1h 16m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 10/10

Nonstop1h 05m

Ontario

Thu 10/12

Nonstop1h 16m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 11/3

Nonstop1h 10m

Ontario

Sun 11/5

Nonstop1h 16m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sat 10/14

Nonstop1h 10m

Ontario

Sat 10/14

Nonstop1h 16m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 10/26

Nonstop1h 02m

Ontario

Mon 10/30

Nonstop1h 19m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 10/10

Nonstop1h 11m

Ontario

Tue 10/10

Nonstop1h 16m

Las Vegas Harry Reid IntlOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sun 10/15

Nonstop1h 00m

Ontario

Tue 10/17

Nonstop1h 16m

Flights are sorted by cheapest first

Deals found on 9/27

Reviews of airlines servicing Ontario

To help decide which airline to fly from Las Vegas to Ontario, see what other customers have to say about Frontier, American Airlines and Alaska Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

Alaska Airlines
8.1
Very good
1,394 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

Southwest
7.6
Good
1,521 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

Sun Country Air
7.4
Good
94 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

United Airlines
7.4
Good
1,890 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

American Airlines
7.2
Good
2,635 reviews
Alaska Airlines
8.1
Very good
1,394 reviews

Boarding

8.3

Overall

8.1

Entertainment

7.2

Food

7.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

I appreciated that we departed & arrived on time. I was very cold on the plane, despite wearing 2 jackets, & will bring a blanket next time. I appreciated the hot tea & cookie I was served. I also appreciated that our luggage was not lost or damaged.

Related info for your journey

Useful info, stats and facts about Las Vegas to Ontario flights.

What airports do I use to fly from Las Vegas to Ontario?

If you wish to fly to Ontario from Las Vegas, then you need to book flights from Las Vegas Harry Reid Intl to Ontario. There are 6 flights from Harry Reid Intl (LAS) to Ontario (ONT) per day to choose from. Flights to Ontario from Harry Reid Intl are available from 3 different airlines, which means you should have some options if you want to compare airfare deals. 1h 00m is how long a nonstop flight from Las Vegas to Ontario typically takes.

Can I find flights from Las Vegas to Ontario for under $100 on Cheapflights?

Yes, there are multiple flights from Las Vegas to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $38, but on average you can expect to pay $50.

Are there nonstop flights from Las Vegas to Ontario for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Las Vegas to Ontario under $100. A good price for a nonstop flight from Las Vegas to Ontario is less than $52.

Are there last-minute flights available from Las Vegas to Ontario for under $100?

There are currently 20+ open flights from Las Vegas to Ontario within the next 7 days for less than $100.

What days are nonstop flights available from Las Vegas to Ontario?

Nonstop flights can be found on the following days: Sunday, Monday, Tuesday, Thursday, Friday, Saturday.

How popular is this Las Vegas to Ontario flight route?

How many flights depart from Las Vegas to Ontario on average per day?

On average 23 flights depart from Las Vegas to Ontario per day.
Early Morning (Midnight to 6am) - 17% of flight departures
Morning (6am - Noon) - 22% of flight departures
Afternoon (Noon - 6pm) - 26% of flight departures
Evening (6pm - Midnight) - 35% of flight departures

How long is the flight from Las Vegas to Ontario?

There are many flights that can get you from Las Vegas to Ontario in 1h 08m. Fly via Frontier to get the fastest option. The distance between Las Vegas and Ontario is about 198 mi. All flights are typically nonstop.

What is the cheapest airline to fly from Las Vegas to Ontario round-trip?

Cheapflights users have booked flights from Las Vegas to Ontario round-trip from $38. You may be able to fly from Las Vegas to Ontario for 41% less than the average price by searching for this airline.

What are the most popular airlines that fly from Las Vegas to Ontario?

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

The top 3 most reliable airlines when flying from Las Vegas to Ontario are Frontier (89%), Southwest (70%) and Ravn Alaska (33%).

What are the cheapest flights from Las Vegas to Ontario?

On average you can expect to pay $103 for a flight from Las Vegas to Ontario. The cheapest flight overall is $22 while the most popular route, (Las Vegas Harry Reid Intl - Ontario) is currently priced at $38.

What does LAS to ONT mean?

Las Vegas Harry Reid Intl Airport is LAS and Ontario Airport is ONT. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

Alternative routes for Las Vegas to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Las Vegas to Ontario

The chart below displays the airlines Cheapflights users traveling from Las Vegas to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$33Average$90FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$40Average$66FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Ravn AlaskaCheapest$83Average$137FlexibilityNo cancel feeOn-timeN/A
Search Ravn Alaska flights

Hourly flight availability from Las Vegas to Ontario

See what time of day planes typically take off from Las Vegas to Ontario
6%of flight departuresEarly morningMidnight to 6 am
28%of flight departuresMorning6 am to noon
37%of flight departuresAfternoonNoon to 6 pm
29%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Las Vegas to Ontario

See how many times per day planes take to the skies headed from Las Vegas to Ontario
Sunday6daily flights
Monday8daily flights
Tuesday6daily flights
Wednesday6daily flights
Thursday8daily flights
Friday8daily flights
Saturday4daily flights

Fly with Cheapflights

What makes Cheapflights the go-to destination for all your flight needs

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

Deals for Las Vegas to Ontario 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 Las Vegas to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Las Vegas.

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

Need flexible booking options for your flight to Ontario from Las Vegas? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights does offer price alerts on Las Vegas to Ontario flights so you can book your travels when it’s right. The Price Alert feature is available after a flight search is performed above.

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