LAS - ONT

$68 Find Cheap Flights from Las Vegas to Ontario - Compare and Save

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Everything you should know

Cheapest round-trip
$107
Typical prices: $78-$243
Frontier
Sat 10/13Wed 10/17
LAS - ONT • Non-stop
Cheapest one-way
$68
Typical prices: $71-$165
Frontier
Fri 9/14
LAS - ONT • Non-stop
Nonstop flights
You can fly direct with Southwest and Frontier. Average duration is 1h 06m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 13 weeks in advance save around 73% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 40% price drop
Most popular
Good to know
+1
Good to know
+1
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Las Vegas to Ontario (LAS-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Las Vegas to Ontario

Tue, Oct 13 - Sat, Oct 17
Frontier Logo
8:00 am - 9:09 amLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 09mnonstop
Frontier Logo
5:25 pm - 6:38 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 13mnonstop
$107Frontier
Tue, Oct 13 - Thu, Oct 15
Frontier Logo
3:20 pm - 4:30 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 10mnonstop
Frontier Logo
3:38 pm - 4:51 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 13mnonstop
$107Frontier
Tue, Sep 29 - Thu, Oct 1
Frontier Logo
8:00 am - 9:09 amLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 09mnonstop
Frontier Logo
8:00 am - 9:02 amONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 02mnonstop
$107Frontier
Wed, Sep 9 - Thu, Sep 10
Frontier Logo
3:45 pm - 4:59 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 14mnonstop
Frontier Logo
8:00 am - 9:02 amONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 02mnonstop
$107Frontier
Thu, Nov 5 - Thu, Nov 12
Southwest Logo
8:55 pm - 9:55 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 00mnonstop
Southwest Logo
7:00 am - 8:05 amONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 05mnonstop
$217Southwest
Thu, Nov 5 - Mon, Nov 9
Southwest Logo
9:35 am - 10:40 amLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 05mnonstop
Southwest Logo
7:00 am - 8:05 amONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 05mnonstop
$217Southwest
Sat, Sep 19 - Mon, Sep 21
Multiple Airlines Logo
3:20 pm - 4:34 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 14mnonstop
Multiple Airlines Logo
4:27 pm - 3:24 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
22h 57m1 stop Santa Rosa Sonoma County
$221Multiple Airlines
Wed, Oct 28 - Sat, Oct 31
Southwest Logo
8:10 am - 1:25 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
5h 15m2 stops Long Beach Municipal Oakland
Southwest Logo
10:05 am - 5:35 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
7h 30m1 stop Denver Intl
$222Southwest
Sat, Sep 19 - Mon, Sep 21
Multiple Airlines Logo
8:00 am - 9:09 amLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 09mnonstop
Multiple Airlines Logo
4:27 pm - 3:24 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
22h 57m1 stop Santa Rosa Sonoma County
$225Multiple Airlines
Wed, Sep 9 - Tue, Sep 22
Multiple Airlines Logo
3:45 pm - 4:59 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 14mnonstop
Multiple Airlines Logo
4:27 pm - 3:24 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
22h 57m1 stop Santa Rosa Sonoma County
$231Multiple Airlines
Booking Insights

Price, demand and travel trends for Las Vegas to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Las Vegas to Ontario with more confidence.

How much is a round-trip flight from Las Vegas to Ontario?

Round-trip flights from Las Vegas to Ontario start at $107. Prices are typical for this route right now, with typical round-trip fares ranging from $78 to $243. The lowest price found in the past 5 days was $107 on Frontier.

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

Saturday is the cheapest day of the week to fly from Las Vegas to Ontario, it is 22% cheaper than the average day. Monday is the most expensive day with flight prices 72% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • January is the cheapest month to fly from Las Vegas to Ontario at $78 round-trip.
  • June ($329) and May ($258) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 321% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Las Vegas to Ontario the cheapest?

Flights from Las Vegas to Ontario are cheapest 13 weeks before departure. Booking in this window typically costs about 73% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Las Vegas to Ontario

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Harriet Baskas

Harriet Baskas

Expert on LAS

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Key details for Las Vegas to Ontario flights

Low season

July

Cheapest flight

$68
Best time to beat the crowds but there is an average 92% increase in price.
Most popular time to fly and prices are also 32% lower on average.
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

Your Las Vegas to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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.

  • Which airlines offer extra legroom and free seat selection on Las Vegas to Ontario flights?

    Among airlines operating Las Vegas to Ontario flights:

    • Frontier: offers free seat selection
    • Southwest: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • What airlines are available from Las Vegas to Ontario?

    2 airlines operate flights between Las Vegas and Ontario. The airlines offering nonstop flights on this route include:

    • Southwest
    • Frontier

  • Which airports can I use when flying from Las Vegas to Ontario?

    Flights from Las Vegas to Ontario usually depart from Las Vegas Harry Reid Intl (LAS) and arrive at Ontario (ONT).

  • Which airlines include bags at no extra cost on Las Vegas to Ontario flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Southwest: a cabin bag and a checked bag in Economy Class
    • Frontier: a cabin bag in Economy Class class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

  • What cabin classes can I book on flights from Las Vegas to Ontario?

    Only Economy Class is available on flights from Las Vegas to Ontario.

  • How much can I save by taking a layover when flying from Las Vegas to Ontario?

    On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $129 round-trip, compared to $533 via a layover through Phoenix Sky Harbor Intl (PHX).

  • What is the standard checked-bag allowance on flights from Las Vegas to Ontario?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Las Vegas to Ontario?

    The Airbus A321neo family is used most often on this route, operated mainly by Frontier. Other aircraft seen on the route include Airbus A320neo variants.

  • Which airports do connecting flights from Las Vegas to Ontario pass through?

    Most connecting flights from Las Vegas to Ontario pass through Phoenix Sky Harbor Intl (PHX), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

  • Can I save money by using flexible dates for flights from Las Vegas to Ontario?

    On the Las Vegas to Ontario route, being flexible with your departure day can save you up to 55%. Saturday is the cheapest day at $102 round-trip on average, while Monday is the most expensive at $224: a $122 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How are flight departures from Las Vegas to Ontario spread across the day?

    Morning is the busiest departure period on Las Vegas to Ontario flights, with 43% of flights leaving in that window. Afternoon departures account for 29%, evening flights for 14%, and night flights for 14%.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • What are the earliest and latest flights from Las Vegas to Ontario?

    These are the earliest and latest flight times available from Las Vegas to Ontario:

    • Earliest: departs at 5:10 am and lands at 6:16 am
    • Latest: departs at 10:55 pm and lands at 12:01 am.

    The flight takes about 1h 06m.

  • How expensive are last-minute Las Vegas to Ontario flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 63% above the route average of $130. Book 13 weeks before departure for the lowest fares.

  • How long is a flight from Las Vegas to Ontario?

    A nonstop flight from Las Vegas to Ontario takes 1h 06m, covering 197 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Las Vegas to Ontario changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $107 to $825. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Las Vegas to Ontario looking right now?

    One-way fares from Las Vegas to Ontario are currently lower than usual. Average one-way flight prices are about $92, which is 24% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

  • How much should I expect to pay for a Las Vegas to Ontario flight?

    Round-trip flights from Las Vegas to Ontario range from $78 to $243, with an average of $130 over the past 12 months. Anything below $78 counts as a good deal.

Your guide to booking Las Vegas to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Saturday departure instead of Monday. On this route, Saturday flights average $102 - about $122 less than Monday (54% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 73% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Las Vegas to Ontario trip for January. Fares historically average $78 round-trip in that month - typically $251 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG
  • 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.

Prefer to fly direct 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.

Direct 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

Direct 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

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

Information on your arrival and departure airports