United States
USD

LAS - ONT

$64 Find Cheap Flights from Las Vegas to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 19% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$85
Typical prices: $86-$279
Frontier
Tue 10/23Wed 10/24
LAS - ONT • Non-stop
Cheapest one-way
$64
Typical prices: $87-$190
Frontier
Sun 12/9
LAS - ONT • 1 stop
Nonstop flights
Every day
You can fly direct with Southwest and Frontier. Average duration is 1h 05m
Direct flights
+1
Direct flights
+1
When to travel
January
Cheapest • 54% price drop
November
Most popular
Good to know
+1
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!

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

 

Cheap flights from Las Vegas to Ontario with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Fri, Oct 23 - Sat, Oct 24
Frontier Logo
3:20 pm - 4:30 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
1h 10mnonstop
Frontier Logo
5:25 pm - 6:38 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 13mnonstop
$85Frontier
Sat, Oct 31 - Sun, Nov 1
Frontier Logo
8:17 am - 4:38 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
8h 21m1 stop Dallas/Fort Worth
Frontier Logo
2:23 pm - 3:31 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 08mnonstop
$96Frontier
Thu, Oct 29 - Fri, Oct 30
Frontier Logo
8:17 am - 7:08 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
10h 51m1 stop Dallas/Fort Worth
Frontier Logo
2:23 pm - 3:31 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 08mnonstop
$96Frontier
Thu, Oct 29 - Fri, Oct 30
Frontier Logo
8:17 am - 7:08 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
10h 51m1 stop Dallas/Fort Worth
Frontier Logo
2:23 pm - 3:31 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
1h 08mnonstop
$96Frontier
Thu, Nov 19 - Mon, Nov 23
American Airlines Logo
9:20 am - 12:45 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
3h 25m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
9:20 am - 12:37 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
3h 17m1 stop Phoenix Sky Harbor Intl
$197American Airlines
Sat, Nov 21 - Mon, Nov 23
American Airlines Logo
12:31 pm - 5:13 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
4h 42m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
1:30 pm - 6:18 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
4h 48m1 stop Phoenix Sky Harbor Intl
$197American Airlines
Thu, Nov 19 - Mon, Nov 23
American Airlines Logo
9:20 am - 12:45 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
3h 25m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:30 am - 11:31 amONT  Ontario-LAS Las Vegas Harry Reid Intl
5h 01m1 stop Phoenix Sky Harbor Intl
$197American Airlines
Wed, Nov 11 - Thu, Nov 12
Southwest Logo
11:15 am - 4:15 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
5h 00m1 stop Oakland
Southwest Logo
5:55 am - 9:15 amONT  Ontario-LAS Las Vegas Harry Reid Intl
3h 20m1 stop San Jose
$198Southwest
Thu, Nov 19 - Thu, Nov 26
Southwest Logo
8:15 am - 12:50 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
4h 35m1 stop Oakland
Southwest Logo
9:45 am - 1:50 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
4h 05m1 stop Sacramento Intl
$198Southwest
Wed, Nov 11 - Thu, Nov 12
Southwest Logo
8:05 am - 12:50 pmLAS  Las Vegas Harry Reid Intl-ONT Ontario
4h 45m1 stop Sacramento Intl
Southwest Logo
11:20 am - 4:30 pmONT  Ontario-LAS Las Vegas Harry Reid Intl
5h 10m2 stops Oakland Santa Barbara
$203Southwest

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 with more confidence.

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

Round-trip flights from Las Vegas to Ontario typically range from $86 to $279. The lowest price found in the past 5 days was $85, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Las Vegas to Ontario. It’s 26% cheaper than the average day, while Monday is the most expensive, with prices 64% higher.

What’s 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 August ($295) 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.

Find deals

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.

Read more
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.

Read more
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.

Read more
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.

Read more

Key details for Las Vegas to Ontario flights

Low season

August

Cheapest flight

$64
Beat the crowds with an average 76% drop in travelers.
The most popular month to fly with an average 79% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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 6:15 am
    • Latest: departs at 11:15 pm and lands at 12:20 am.

    The flight takes about 1h 05m.

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

    Two cabin classes are available on flights from Las Vegas to Ontario:

    • Economy Class
    • Business Class

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

    A nonstop flight from Las Vegas to Ontario takes 1h 05m, 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.

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

    Round-trip flights from Las Vegas to Ontario range from $86 to $279, with an average of $169 over the past 12 months. Anything below $86 counts as a good deal.

  • 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 $169 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 A320neo family is used most often on this route, operated mainly by Frontier. Other aircraft seen on the route include Airbus A321neo variants.

  • 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%.

  • 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 $85, which is 33% 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

  • 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 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.

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

    Yes. Flexible dates can save you up to 55% on flights from Las Vegas to Ontario. Wednesday is the cheapest departure day at $126 round-trip on average, while Monday is the most expensive at $278, a difference of $152.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly 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

  • What popular places can I visit in Ontario?

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

  • 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.

  • 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 always check the fare details before booking.

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 are flexible, aim for a Wednesday departure and avoid flying on Monday. On this route, Wednesday flights average $126, about $152 less than Monday fares (55% savings) based on the 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
    • Ontario Airport Inn
  • After landing at ONT, take the free airport shuttle from the passenger terminals to the Rental Car Center, where the on-airport rental-car counters are located. Hours vary by company. For example, Alamo and Enterprise are open Sun–Sat 6:00 am–11:59 pm, while Fox is open Sun–Sat 6:00 am–12:30 am.
  • Arrange mobility assistance through your airline before flying. At Harry Reid International Airport and Ontario International Airport, airlines can provide wheelchair assistance and help getting through the terminal before or after your flight.
  • If you're heading to Ontario for a longer trip, you can leave your car at Harry Reid International Airport (LAS). LAS has three long-term parking options: the covered Long Term parking garage, the uncovered Economy parking lot and the Remote Lot.

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

More options for your flight from Las Vegas to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario