How popular is this Las Vegas to Ontario flight route?

Within the past month, 103 users have taken a look at flights from Las Vegas Harry Reid Intl to Ontario.

What are the cheapest airlines flying from Las Vegas to Ontario round-trip?

Cheapflights users have booked flights from Las Vegas to Ontario round-trip from $61. Other airlines that can offer you cheap pricing are Southwest, from $117, and American Airlines, from $203. You may be able to fly from Las Vegas to Ontario for 14% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Las Vegas to Ontario one-way?

The cheapest airlines for a one-way flight from Las Vegas to Ontario are Frontier ($28), Southwest ($49), and American Airlines ($130).

What are the cheapest flights from Las Vegas to Ontario?

On average you can expect to pay $82 for a flight from Las Vegas to Ontario. The cheapest flight overall is $37 while the most popular route, (Las Vegas Harry Reid Intl - Ontario) is currently priced at $55.

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

Consider Frontier, Spirit Airlines or Southwest when booking your flight. These represent the most popular airlines when flying from Las Vegas to Ontario.

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 60 days before your planned departure. Booking around this time can save you about 48% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $50 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $99.

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

The best pricing can be found in the month of May. Prices to Ontario from Las Vegas average $78. You can even find prices in May for less than $78, as users have found deals to Ontario from as low as $27. The month of March 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 31%.

Most accurate provider : When it comes to deals on Las Vegas-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-Ontario flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Las Vegas-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Las Vegas-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 5 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 02m is how long a nonstop flight from Las Vegas to Ontario typically takes.

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.

$28+ Flights from Las Vegas to Ontario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Las Vegas to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Ontario are usually found in September or August, booked 46 days in advance, depart on a Tuesday or Thursday and return on a Sunday

Cheap flight deals from Las Vegas to Ontario

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$61 (Cheapflightsfares)
One-way from	$28 (Cheapflightsfares)
Popular in	March
Cheapest in	September
Average price	$78
Good round-trip deal	$87 or less
Good one-way deal	$48 or less

Provider with most accurate pricing for Las Vegas Harry Reid Intl-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Ontario flights.

Search Deals

From Las Vegas Harry Reid Intl to Ontario

Search Deals

One-way flight from Las Vegas Harry Reid Intl to Ontario

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($10 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($3 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Ontario.

Search Deals

Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Ontario.

Search Deals

Find flight deals from Las Vegas to Ontario

Cheapest flights from Las Vegas to Ontario
Explore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Mon 5/56:20 amLAS - ONT

Nonstop1h 04mFrontier

Mon 5/510:52 amONT - LAS

Nonstop1h 12mFrontier

Deal found 4/11

$61

Thu 5/17:15 amLAS - ONT

Nonstop1h 00mSouthwest

Sun 5/46:30 amONT - LAS

1 stop4h 15mSouthwest

Deal found 4/10

$127

Fri 4/2512:29 pmLAS - ONT

1 stop3h 30mAmerican Airlines

Fri 4/257:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Deal found 4/10

$203

Best flights from Las Vegas to Ontario
Discover carefully curated flight deals from Las Vegas to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Mon 5/56:20 amLAS - ONT

Nonstop1h 04mFrontier

Mon 5/510:52 amONT - LAS

Nonstop1h 12mFrontier

Deal found 4/11

$61

Mon 5/55:20 amLAS - ONT

1 stop3h 50mSouthwest

Thu 5/812:00 pmONT - LAS

1 stop3h 15mSouthwest

Deal found 4/10

$117

Fri 4/2512:29 pmLAS - ONT

1 stop3h 30mAmerican Airlines

Fri 4/257:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Deal found 4/10

$203

Sat 5/107:20 amLAS - ONT

2 stops8h 12mAlaska Airlines

Mon 5/126:24 pmONT - LAS

2 stops20h 35mAlaska Airlines

Deal found 4/9

$333

Thu 5/17:45 amLAS - ONT

1 stop7h 47mHawaiian Airlines

Sun 5/46:00 amONT - LAS

1 stop10h 40mHawaiian Airlines

Deal found 4/10

$363

Fri 5/94:08 pmLAS - ONT

3 stops20h 16mUnited Airlines

Sun 5/116:00 amONT - LAS

1 stop12h 32mUnited Airlines

Deal found 4/10

$413

Thu 4/246:10 amLAS - ONT

2 stops17h 31mDelta

Fri 4/2511:45 amONT - LAS

1 stop10h 46mDelta

Deal found 4/10

$618

Fri 9/197:00 amLAS - ONT

1 stop14h 41mJetBlue

Mon 9/2211:00 pmONT - LAS

1 stop13h 25mJetBlue

Deal found 4/10

$628

Last-minute flights from Las Vegas to Ontario
Discover last-minute flight deals from Las Vegas to Ontario. Data last updated April 11, 2025 and is based on user searches.

Fri 4/187:25 pmLAS - ONT

1 stop3h 35mSouthwest

Sun 4/2011:30 amONT - LAS

2 stops5h 20mSouthwest

Deal found 4/10

$400

Fri 4/1810:37 amLAS - ONT

2 stops13h 22mAlaska Airlines

Sun 4/277:00 amONT - LAS

1 stop6h 02mAlaska Airlines

Deal found 4/10

$578

Fri 4/186:00 amLAS - ONT

1 stop14h 21mUnited Airlines

Mon 4/214:23 pmONT - LAS

2 stops18h 24mUnited Airlines

Deal found 4/10

$657

Sat 4/192:09 pmLAS - ONT

Nonstop1h 10mFrontier

Sat 4/2610:53 amONT - LAS

Nonstop1h 09mFrontier

Deal found 4/10

$96

Sun 4/207:00 amLAS - ONT

2 stops11h 20mAmerican Airlines

Mon 4/214:35 pmONT - LAS

1 stop5h 07mAmerican Airlines

Deal found 4/10

$524

Fri 4/2512:29 pmLAS - ONT

1 stop3h 30mAmerican Airlines

Fri 4/257:25 pmONT - LAS

1 stop3h 13mAmerican Airlines

Deal found 4/10

$203

Thu 5/17:15 amLAS - ONT

Nonstop1h 00mSouthwest

Sun 5/46:30 amONT - LAS

1 stop4h 15mSouthwest

Deal found 4/10

$127

Thu 5/17:45 amLAS - ONT

1 stop7h 47mHawaiian Airlines

Sun 5/46:00 amONT - LAS

1 stop10h 40mHawaiian Airlines

Deal found 4/10

$363

Mon 5/56:20 amLAS - ONT

Nonstop1h 04mFrontier

Mon 5/510:52 amONT - LAS

Nonstop1h 12mFrontier

Deal found 4/11

$61

Fri 5/94:08 pmLAS - ONT

3 stops20h 16mUnited Airlines

Sun 5/116:00 amONT - LAS

1 stop12h 32mUnited Airlines

Deal found 4/10

$413

Sat 5/107:20 amLAS - ONT

2 stops8h 12mAlaska Airlines

Mon 5/126:24 pmONT - LAS

2 stops20h 35mAlaska Airlines

Deal found 4/9

$333

One-way flights from Las Vegas to Ontario
Search for one-way flight options from Las Vegas to Ontario. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Sat 5/106:20 amLAS - ONT

Nonstop1h 04mFrontier

Deal found 4/10

$28

Tue 7/87:10 amLAS - ONT

Nonstop1h 00mSouthwest

Deal found 4/10

$49

Tue 5/66:20 amLAS - ONT

1 stop5h 30mAmerican Airlines

Deal found 4/10

$130

Thu 6/54:26 pmLAS - ONT

1 stop6h 20mAlaska Airlines

Deal found 4/11

$161

Tue 8/56:00 amLAS - ONT

2 stops11h 43mUnited Airlines

Deal found 4/10

$203

Tue 6/36:10 amLAS - ONT

2 stops10h 07mDelta

Deal found 4/10

$233

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

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Mon 5/5

6:20 am-7:24 am

Nonstop1h 04m

Ontario

Mon 5/5

10:52 am-12:04 pm

Nonstop1h 12m

$61

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Mon 5/5

5:20 am-9:10 am

1 stop3h 50m

Ontario

Thu 5/8

12:00 pm-3:15 pm

1 stop3h 15m

$117

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 4/25

12:29 pm-3:59 pm

1 stop3h 30m

Ontario

Fri 4/25

7:25 pm-10:38 pm

1 stop3h 13m

$203

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sat 5/10

7:20 am-3:32 pm

2 stops8h 12m

Ontario

Mon 5/12

6:24 pm-2:59 pm

2 stops20h 35m

$333

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 5/1

7:45 am-3:32 pm

1 stop7h 47m

Ontario

Sun 5/4

6:00 am-4:40 pm

1 stop10h 40m

$363

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 5/9

4:08 pm-12:24 pm

3 stops20h 16m

Ontario

Sun 5/11

6:00 am-6:32 pm

1 stop12h 32m

$413

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Thu 4/24

6:10 am-11:41 pm

2 stops17h 31m

Ontario

Fri 4/25

11:45 am-10:31 pm

1 stop10h 46m

$618

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Fri 9/19

7:00 am-9:41 pm

1 stop14h 41m

Ontario

Mon 9/22

11:00 pm-12:25 pm

1 stop13h 25m

$628

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Sat 5/10

6:20 am-7:24 am

Nonstop1h 04m

$28

Las VegasOntario

LAS - ONT

LASONT

Las Vegas Harry Reid Intl

Tue 7/8

7:10 am-8:10 am

Nonstop1h 00m

$49

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 14 results

Compare providers for flights from Las Vegas to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Las Vegas to Ontario in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
CheapOair	Price Accuracy1 star	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Las Vegas-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-Ontario flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Las Vegas-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Las Vegas-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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?

To ensure you get the cheapest price possible for a flight from Las Vegas to Ontario, you should look to book at least 38 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 Las Vegas to Ontario?

Currently, August is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $246). Flying from Las Vegas to Ontario in March is currently the most expensive (average of $328). 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?

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 at noon, which can drop the price by up to 22% versus a flight in the afternoon.

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

Travelers seeking maximum savings on their Las Vegas to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,851 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,910 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,366 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,636 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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 5 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 02m is how long a nonstop flight from Las Vegas to Ontario typically takes.
How popular is this Las Vegas to Ontario flight route?
Within the past month, 103 users have taken a look at flights from Las Vegas Harry Reid Intl to Ontario.
What are the cheapest airlines flying from Las Vegas to Ontario round-trip?
Cheapflights users have booked flights from Las Vegas to Ontario round-trip from $61. Other airlines that can offer you cheap pricing are Southwest, from $117, and American Airlines, from $203. You may be able to fly from Las Vegas to Ontario for 14% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Las Vegas to Ontario one-way?
The cheapest airlines for a one-way flight from Las Vegas to Ontario are Frontier ($28), Southwest ($49), and American Airlines ($130).
What are the cheapest flights from Las Vegas to Ontario?
On average you can expect to pay $82 for a flight from Las Vegas to Ontario. The cheapest flight overall is $37 while the most popular route, (Las Vegas Harry Reid Intl - Ontario) is currently priced at $55.
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, August is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $246). Flying from Las Vegas to Ontario in March is currently the most expensive (average of $328). 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

Browse thousands of different options on Cheapflights for your next trip

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Other flights to Ontario

Top 3 airlines flying from Las Vegas to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$23	Average$48	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$38	Average$70	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$97	Average$230	FlexibilityNo cancel fee	On-time63%

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$28+ Cheap flights from Las Vegas to Ontario (LAS - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Las Vegas to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Ontario are usually found in September or August, booked 46 days in advance, depart on a Tuesday or Thursday and return on a Sunday

Cheap flight deals from Las Vegas to Ontario

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Las Vegas to Ontario

Cheapest flights from Las Vegas to OntarioExplore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Explore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Las Vegas to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Las Vegas to Ontario in April.

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.

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?

Use this chart to determine the optimal time to book a round-trip flight from Las Vegas to Ontario. Price data was last updated on April 4, 2025.

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

What is the cheapest time of day to fly from LAS to ONT?

Find hourly flight availability from Las Vegas to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Las Vegas to Ontario. Price data was last updated on March 30, 2025.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

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 Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How popular is this Las Vegas to Ontario flight route?

What are the cheapest airlines flying from Las Vegas to Ontario round-trip?

What are the cheapest airlines to fly from Las Vegas to Ontario one-way?

What are the cheapest flights from Las Vegas to Ontario?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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Travel Smart

Cheapest flights from Las Vegas to Ontario
Explore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.