LAS - ONT

$23 Find Cheap Flights from Las Vegas to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Las Vegas to Ontario departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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0 bags

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to Ontario, as well as popular online travel agencies
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Cheap Flight Deals from Las Vegas to Ontario (LAS-ONT)

 
These are the cheapest deals for flights from Las Vegas to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Las Vegas to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Las Vegas to Ontario.

Recent one-way flight deals from Las Vegas to Ontario

Only flying one-way? Below are some of the best one-way flight deals from Las Vegas to Ontario found on KAYAK recently.

Recent last minute flight deals from Las Vegas to Ontario

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Las Vegas to Ontario.

Recent direct flight deals from Las Vegas to Ontario

The latest deals for direct flights from Las Vegas to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Las Vegas to Ontario

Find recent round-trip train or bus tickets from Las Vegas to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
8:04 am - 9:12 amONT-LAS
1h 08mnonstop
$37Frontier
Find Deal
Fri, Dec 13 - Sun, Dec 15
6:55 pm - 7:59 pmLAS-ONT
1h 04mnonstop
8:04 am - 9:12 amONT-LAS
1h 08mnonstop
$38Frontier
Find Deal
Thu, Dec 12 - Sun, Dec 15
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
8:59 pm - 10:08 pmONT-LAS
1h 09mnonstop
$41Frontier
Find Deal
Sat, Dec 14 - Sun, Dec 15
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
$42Frontier
Find Deal
Sat, Dec 14 - Mon, Dec 16
11:30 am - 12:39 pmLAS-ONT
1h 09mnonstop
10:39 pm - 11:59 pmONT-LAS
1h 20mnonstop
$43Frontier
Find Deal
Wed, Dec 18 - Fri, Dec 20
11:30 am - 12:39 pmLAS-ONT
1h 09mnonstop
10:19 pm - 11:39 pmONT-LAS
1h 20mnonstop
$44Frontier
Find Deal
Wed, Dec 18 - Mon, Dec 23
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
8:04 am - 9:12 amONT-LAS
1h 08mnonstop
$46Frontier
Find Deal
Sat, Dec 7 - Sun, Dec 8
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
1:47 pm - 3:01 pmONT-LAS
1h 14mnonstop
$47Frontier
Find Deal
Sat, Dec 7 - Mon, Dec 9
10:51 pm - 4:34 pmLAS-ONT
17h 43m1 stop
1:29 pm - 9:54 pmONT-LAS
8h 25m1 stop
Sat, Dec 21 - Sun, Jan 5
12:20 pm - 6:27 pmLAS-ONT
6h 07m1 stop
9:55 am - 3:51 pmONT-LAS
5h 56m1 stop
$204American Airlines
Find Deal
Thu, Dec 12 - Tue, Dec 17
6:00 am - 7:09 amLAS-ONT
1h 09mnonstop
$23Frontier
Find Deal
Tue, Dec 31
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
$24Frontier
Find Deal
Thu, Dec 5
8:40 pm - 9:45 pmLAS-ONT
1h 05mnonstop
$83Southwest
Find Deal
Tue, Jan 21
8:30 am - 9:35 amLAS-ONT
1h 05mnonstop
$109Southwest
Find Deal
Tue, Jan 14
5:42 am - 9:12 amLAS-ONT
3h 30m1 stop
$115American Airlines
Find Deal
Mon, Dec 23
5:42 am - 9:12 amLAS-ONT
3h 30m1 stop
$117American Airlines
Find Deal
Mon, Dec 23
12:04 pm - 9:27 pmLAS-ONT
9h 23m1 stop
$131Alaska Airlines
Find Deal
Wed, Mar 5
7:53 am - 5:04 pmLAS-ONT
9h 11m2 stops
$136Alaska Airlines
Find Deal
Wed, Jan 15
6:00 am - 8:40 pmLAS-ONT
14h 40m2 stops
$173United Airlines
Find Deal
Sat, Feb 15
11:52 am - 8:40 pmLAS-ONT
8h 48m1 stop
$188United Airlines
Find Deal
Tue, Feb 18
8:00 am - 9:04 amLAS-ONT
1h 04mnonstop
10:52 pm - 11:53 pmONT-LAS
1h 01mnonstop
$81Frontier
Find Deal
Fri, Nov 22 - Sun, Nov 24
3:51 pm - 4:58 pmLAS-ONT
1h 07mnonstop
10:40 pm - 11:55 pmONT-LAS
1h 15mnonstop
$85Frontier
Find Deal
Mon, Nov 25 - Thu, Nov 28
12:31 pm - 6:29 pmLAS-ONT
5h 58m1 stop
7:30 pm - 10:39 pmONT-LAS
3h 09m1 stop
$561American Airlines
Find Deal
Thu, Nov 21 - Thu, Nov 21
1:28 pm - 6:29 pmLAS-ONT
5h 01m1 stop
7:30 pm - 10:39 pmONT-LAS
3h 09m1 stop
$566American Airlines
Find Deal
Thu, Nov 21 - Fri, Nov 22
6:00 am - 8:12 pmLAS-ONT
14h 12m1 stop
6:00 am - 5:13 pmONT-LAS
11h 13m2 stops
$827Alaska Airlines
Find Deal
Sat, Nov 23 - Mon, Nov 25
6:00 am - 5:42 pmLAS-ONT
11h 42m2 stops
6:00 am - 5:13 pmONT-LAS
11h 13m2 stops
$932Alaska Airlines
Find Deal
Sat, Nov 23 - Mon, Nov 25
7:53 am - 1:00 pmLAS-ONT
5h 07m1 stop
6:00 am - 10:06 amONT-LAS
4h 06m1 stop
$972United Airlines
Find Deal
Sat, Nov 23 - Tue, Nov 26
6:08 am - 9:53 amLAS-ONT
3h 45m1 stop
6:00 am - 10:06 amONT-LAS
4h 06m1 stop
$1,010United Airlines
Find Deal
Thu, Nov 21 - Thu, Nov 28
2:36 pm - 11:01 pmLAS-ONT
8h 25m1 stop
12:58 am - 5:12 pmONT-LAS
16h 14m2 stops
$1,518Volaris
Find Deal
Sun, Nov 24 - Mon, Nov 25
2:36 pm - 11:01 pmLAS-ONT
8h 25m1 stop
12:58 am - 1:06 pmONT-LAS
12h 08m1 stop
$1,550Volaris
Find Deal
Sun, Nov 24 - Mon, Nov 25
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
8:04 am - 9:12 amONT-LAS
1h 08mnonstop
$37Frontier
Find Deal
Fri, Dec 13 - Sun, Dec 15
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
8:59 pm - 10:08 pmONT-LAS
1h 09mnonstop
$41Frontier
Find Deal
Sat, Dec 14 - Sun, Dec 15
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
$42Frontier
Find Deal
Sat, Dec 14 - Mon, Dec 16
7:00 am - 8:06 amLAS-ONT
1h 06mnonstop
10:31 pm - 11:51 pmONT-LAS
1h 20mnonstop
$44Frontier
Find Deal
Thu, Dec 19 - Thu, Dec 26
10:40 am - 11:48 amLAS-ONT
1h 08mnonstop
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
$46Frontier
Find Deal
Thu, Dec 5 - Sun, Dec 8
10:00 am - 11:08 amLAS-ONT
1h 08mnonstop
9:23 pm - 10:33 pmONT-LAS
1h 10mnonstop
$47Frontier
Find Deal
Fri, Dec 6 - Mon, Dec 9
6:55 pm - 7:59 pmLAS-ONT
1h 04mnonstop
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
$48Frontier
Find Deal
Thu, Dec 5 - Sun, Dec 8
6:05 am - 7:14 amLAS-ONT
1h 09mnonstop
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
$49Frontier
Find Deal
Thu, Dec 5 - Sun, Dec 8
6:00 am - 7:09 amLAS-ONT
1h 09mnonstop
10:39 pm - 11:59 pmONT-LAS
1h 20mnonstop
$50Frontier
Find Deal
Fri, Dec 20 - Fri, Dec 27
9:30 pm - 10:30 pmLAS-ONT
1h 00mnonstop
8:05 pm - 9:10 pmONT-LAS
1h 05mnonstop
$230Southwest
Find Deal
Sun, Jan 12 - Fri, Jan 17

Flights from Las Vegas to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Las Vegas to Ontario to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Las Vegas to Ontario?

The average price of all flights from Las Vegas to Ontario clicked on KAYAK for each day over the last 12 months.
When flying from Las Vegas to Ontario, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Las Vegas, you’ll find the best rates on Tuesdays and the most expensive ones on Fridays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Las Vegas to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Las Vegas to Ontario is September, where tickets cost $56 on average. On the other hand, the most expensive months are February and March, where the average cost of tickets is $97 and $96 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Las Vegas to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Las Vegas to Ontario, you should book around 4 days before departure. For the absolute cheapest price, our data suggests you should book 102 days before departure.

Good to know

Low season

February

High season

November

Cheapest flight

$23
Best time to beat the crowds but there is an average 36% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from Las Vegas to Ontario

When to book flights from Las Vegas to Ontario

Are your dates flexible? Find out the best times to travel from Las Vegas to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Las Vegas to Ontario

  • Where can passengers sleep at ONT airport?

    The Sheraton Gateway Hotel at Ontario International Airport is the only hotel that is physically located inside the Ontario International Airport. It provides weary passengers with the opportunity to rejuvenate themselves by sleeping, swimming, showering, and working out. Day usage charges are available.

  • Are there any kid-friendly amenities at ONT airport?

    A nursing room, which can be found in Terminal 3 near the Duty-Free shop as well as at Gate B1, offers mothers a quiet place to breastfeed their children in private. Chairs, changing tables, and sinks may be found in each and every nursing room.

  • How can I get to downtown Ontario from ONT airport?

    The trip from Ontario International Airport to Union Station in the heart of downtown Toronto on the Union Pearson Express takes just 25min. It loads at Terminals 1 and 2.

  • How do I get from downtown Las Vegas to Harry Reid International Airport?

    Since downtown Las Vegas is just approximately 20min away by vehicle from the airport, you can simply use a cab or ridesharing service like Uber to get there. There is access to LAS through public transit, which will take around 30min.

  • What is the cheapest flight from Las Vegas to Ontario?

    In the last 3 days, the lowest price for a flight from Las Vegas to Ontario was $23 for a one-way ticket and $37 for a round-trip.

  • Do I need a passport to fly between Las Vegas and Ontario?

    A passport is not required to fly from Las Vegas to Ontario.

  • Which airlines offer Wi-Fi service onboard planes from Las Vegas to Ontario?

    Delta, American Airlines, Alaska Airlines, and JetBlue offer inflight Wi-Fi service on the Las Vegas to Ontario flight route.

  • Which aircraft models fly most regularly from Las Vegas to Ontario?

    The Airbus A320neo is the aircraft model that flies most regularly on the Las Vegas to Ontario flight route.

  • On which days can I fly direct from Las Vegas to Ontario?

    There are nonstop flights from Las Vegas to Ontario on a daily basis.

  • Which is the best airline for flights from Las Vegas to Ontario, Southwest or Frontier?

    The two airlines most popular with KAYAK users for flights from Las Vegas to Ontario are Southwest and Frontier. With an average price for the route of $250 and an overall rating of 8.1, Southwest is the most popular choice. Frontier is also a great choice for the route, with an average price of $69 and an overall rating of 6.1.

  • How does KAYAK find such low prices on flights from Las Vegas to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Las Vegas to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Las Vegas to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Las Vegas is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Las Vegas to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Las Vegas with another airline. Booking your flights between Las Vegas and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Las Vegas to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Las Vegas up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Las Vegas to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $39 or less one-way and $55 or less round-trip.
  • At the Harry Reid International Airport in Las Vegas (LAS), there are specific areas inside as well as outside of the terminals where passengers may take their dogs to discharge themselves. The airport offers post-security covered inside rooms as well as outdoor designated enclosures where travelers may take their animals to relieve themselves. These places are available to travelers who are traveling with pets or service animals. There are three locations within the airport that serve as checkpoints once passengers have cleared security: the A/B/C Gates of Terminal 1, the D Gates of Terminal 1, and the west end of Terminal 3 at Gate E11.
  • Are you intending to be in Ontario for a longer period of time and need to park your vehicle at the Harry Reid International Airport (LAS) while you are away? When it comes to parking over an extended period of time at LAS, you have two options: the covered parking garage or the uncovered parking lot.
  • Do you plan to arrive in Las Vegas ahead of time and are looking for things to keep yourself occupied before your flight departs? Attempt to unwind by visiting one of the lounges, such as the Club LAS. The Centurion Club is also available. These may be found at Terminal 1 on the ground floor and in the main terminal on the higher level, respectively.
  • Services for travelers with limited mobility are available at both Harry Reid International Airport and Ontario International Airport. Before or after your flight, any airport can help you with wheelchair rentals and getting through the terminal. If you want to use these amenities, please notify your airline in advance.
  • When you arrive at the Ontario Airport (ONT), proceed to the auto-rental facility to pick up your rental vehicle. There is no need to take a shuttle to a separate place since the vehicle rental agency is right there in the airport. The automobile rental service is available at any time.
See more tips

Prefer to fly non-stop from Las Vegas to Ontario?

Find which airlines fly direct from Las Vegas Harry Reid Intl Airport to Ontario Airport, which days they fly and book direct flights.

Nonstop departures

Las Vegas Harry Reid Intl to Ontario

Monday

Frontier, Southwest

Frontier, Southwest

Tuesday

Frontier, Southwest

Frontier, Southwest

Wednesday

Frontier, Southwest

Frontier, Southwest

Thursday

Frontier, Southwest

Frontier, Southwest

Friday

Frontier, Southwest

Frontier, Southwest

Saturday

Frontier, Southwest

Frontier, Southwest

Sunday

Frontier, Southwest

Frontier, Southwest

See more direct flights

Nonstop returns

Ontario to Las Vegas Harry Reid Intl

Monday

Frontier, Southwest

Frontier, Southwest

Tuesday

Frontier, Southwest

Frontier, Southwest

Wednesday

Frontier, Southwest

Frontier, Southwest

Thursday

Frontier, Southwest

Frontier, Southwest

Friday

Frontier, Southwest

Frontier, Southwest

Saturday

Frontier, Southwest

Frontier, Southwest

Sunday

Frontier, Southwest

Frontier, Southwest

See more direct flights
See more direct flights

Top 3 airlines serving from Las Vegas to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Las Vegas to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Las Vegas to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
SouthwestOverall score based on 5015 reviews
8.2Boarding
8.1Comfort
7.7Entertainment
7.2Food
8.7Crew
Airline reviews

This was a nicer flight - not fully booked and so we were able to spread out.

10.0 ExcellentJohn, Nov 2024LAS - IND
Read more Southwest reviews

This was a nicer flight - not fully booked and so we were able to spread out.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

The plane arrived 25 minutes late, and the Wi-Fi was slower than it usually is.

Forget beverage, they didn't even have water for half the passangers?

Can not wait for seating change to reduce the amount of pre boards - it’s disheartening the abuse. And then then deplaning

A bit expensive for the overall service; but the flight departed on time and arrived early.

Board Milian spokesman with pre boarding , not after A group and without my spouse. Total BS, back to Alaska Airlibes I GO. oner 1.2M miles and 900 flights, and every time I fly SWA I regret it, thos will be last time, I only flew SWA but to time requirements fir a Funeral. NEVER AGAIN SWA

The crew was nice. Boarding sucked. Instead of loading from the back to the front people just sat wherever and you had to wait for them to move to get to a seat. And the flight was 25 minutes delayed.

No carry on available to purchase at any point, charged for water, no power to charge phone. Other discount airlines have this.

I could not print my boarding passes and had to see an agent. However, the agents were very friendly and helpful.

It was cancelled unexpectedly so we rented a car and drove home.

This airline is effective for the price you pay, do not expect anything extra at all. You have to pay extra for seat assignment , carry on luggage, food, you name it ...and even if you pay extra for better seats they do not recline.

Got on quickly and easily. When it turned out the other two seats in my row would be occupied, a nearby flight attendant immediately let me know that I could move one row behind me since it was an empty row, I moved into the window seat where I could relax enough to take a little nap. Can’t ask for much more.

Check in was made easy with the ladies at the luggage. they were fast and so kind. You should pay them more.

The plane crew made the decision to leave a LARGE group of us passengers who were stuck literally at the gate next to the Las Vegas flight & trying to get off. We were lied to & told the Vegas to Dallas plane was going to wait for us. I’m having to fly the whole night to my destination now because of this

Delayed 4 hours, the plane hot as hell. 2 passengers got sick. One of them was my wife. Airflow was very bad.

Paid 16 dollars for "streaming" grade WiFi. It cut out 10 minutes after paying for it and wasn't even fast enough to stream 480p video when it was working.

The plane smeltof burning plastic. The seat was the most uncomfortable seat i have ever been on, packed so tight together my bent knees touched the seat in front. No clearance under the seat for bag. Charge for carry on. By the time i paid for carry on 50$ and seat. This was not a cheap ticket. No food (red eye) No charging station (standard on most planes) Crying baby. I will never fly spirit again. And i fly several times a year.

My first flight was moved 6 hours causing me to miss my meeting. The second was delayed about an hour and a half. Most of the crews apparently dont like their jobs or just working for Frontier. Only one flight attendant wasn"t snappy or rude.

Stop changing gates at sfo. When you are elderly going back for it’s not fun.

There was no easy way to check in. I don't want to install an app to checkin. I will use alaska from now on because they have a web check in method that is easy.

Horrible! The short distance flight ended up taking 5 hrs! There was a 3 hr delay for the flight to take off and there was a 70 min wait on the tarmac for some bogus reason that the pilot said the gate he was supposed to board was taken up. After a 30 min wait he said the plane that was supposed to push out of the gate called a medical emergency and 40 min later he ended up boarding another gate. For the initial 3 hr delay there was no information/alert about the gate or delay in the app or the boards up until the boarding time and even beyond! Had to walk all the way to the end of the terminal to find the frontier staff to ask what was going on. Avoid this airline at all costs! If you have carryon bags or checked bags , their prices come equivalent to the prices of more reliable airlines. They are the worst in timeliness at 60% (reported as delayed) this year (check the data) by a high margin even compared to the second worst airline. If you are ok with having a miserable flight experience with the odds close to flip of a coin, feel free to try them. If you value your time , money and flying experience, stay away.

I went to the Frontier counter in San Jose at 1030am or so on Sunday 10/13/24 to see if I could get an earlier flight to San Diego in lieu of my reserved 630pm flight. One thing led to another, and I was able to obtain an open seat for about $ 56. on the earlier flight. Fine. Then the agent asked if I "was checking a bag". Not knowing that carry-ons cost extra per Frontier policy, I thought that she meant a regular checked bag. Therefore, I said no. Once I got to the gate, the same gate agent who sold me a ticket told me that I had to pay $99 for a carry-on, and that all bags were extra on Frontier. Having never flown on Frontier, I was not aware of this. Part of the issue was that she was not a native English speaker, so there was a miscommunication as to what "bag" meant. I would have preferred for her to have clearly let me know at the front counter that any bag including a carry-on cost $99. It would have had the same outcome, as I had to take my carry-on. But it got hectic at the last minute at the gate itself. The baggage policy should have mentioned "including carry-ons" when we first spoke.

Most horrible airlines. Please avoid it. It's ok to spend $50 extra for delta, united or Alaska

The trip was good but the last minute changes I didn’t like because I had already talked to the attendee and they didn’t help me with my ticket I was having trouble checking in and when the time was up they help me but charge me for that and last minute luggage it was a small bag. After I was in the airplane I realized you were charging because the flight was almost empty and you have to get the money some how. Thanks for everything.

First time experience and though you'll pay for *everything* meaning bags, water/snacks, even a question with a service agent - - all in all, not a bad experience whatsoever.

Our flight was delayed by four hours without notice, the app for getting my boarding pass is super confusing, and I wasn’t able to check a suitcase without paying for a higher cost package

Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.

Book cheap flights from Las Vegas to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Las Vegas to Ontario found on KAYAK in the last 72 hours.
12/31Tue
nonstopFrontier
1h 09mLAS-ONT
$23
12/5Thu
nonstopFrontier
1h 09mLAS-ONT
$24
1/21Tue
nonstopSouthwest
1h 05mLAS-ONT
$83
1/14Tue
nonstopSouthwest
1h 05mLAS-ONT
$109
12/23Mon
1 stopAmerican Airlines
3h 30mLAS-ONT
$115
12/23Mon
1 stopAmerican Airlines
3h 30mLAS-ONT
$117
3/5Wed
1 stopAlaska Airlines
9h 23mLAS-ONT
$131
1/15Wed
2 stopsAlaska Airlines
9h 11mLAS-ONT
$136
2/15Sat
2 stopsUnited Airlines
14h 40mLAS-ONT
$173
2/18Tue
1 stopUnited Airlines
8h 48mLAS-ONT
$188

Search by stops

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Last minute flights from Las Vegas to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Las Vegas to Ontario that are departing in the next 10 days.
11/22Fri
nonstopFrontier
1h 04mLAS-ONT
11/24Sun
nonstopFrontier
1h 01mONT-LAS
$81
11/25Mon
nonstopFrontier
1h 07mLAS-ONT
11/28Thu
nonstopFrontier
1h 15mONT-LAS
$85
11/21Thu
multi-stopAmerican Airlines
5h 58mLAS-ONT
11/21Thu
multi-stopAmerican Airlines
3h 09mONT-LAS
$561
11/21Thu
multi-stopAmerican Airlines
5h 01mLAS-ONT
11/22Fri
multi-stopAmerican Airlines
3h 09mONT-LAS
$566
11/23Sat
multi-stopAlaska Airlines
14h 12mLAS-ONT
11/25Mon
multi-stopAlaska Airlines
11h 13mONT-LAS
$827
11/23Sat
multi-stopAlaska Airlines
11h 42mLAS-ONT
11/25Mon
multi-stopAlaska Airlines
11h 13mONT-LAS
$932
11/23Sat
multi-stopUnited Airlines
5h 07mLAS-ONT
11/26Tue
multi-stopUnited Airlines
4h 06mONT-LAS
$972
11/21Thu
multi-stopUnited Airlines
3h 45mLAS-ONT
11/28Thu
multi-stopUnited Airlines
4h 06mONT-LAS
$1,010
11/24Sun
multi-stopVolaris
8h 25mLAS-ONT
11/25Mon
multi-stopVolaris
16h 14mONT-LAS
$1,518
11/24Sun
multi-stopVolaris
8h 25mLAS-ONT
11/25Mon
multi-stopVolaris
12h 08mONT-LAS
$1,550

Search by stops

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Search by price

Everything you need to know for your flight from Las Vegas to Ontario

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.