$41+ 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 5/21. 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
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 April, booked 46 days in advance, depart on a Tuesday or Thursday and return on a Sunday
Cheap flight deals from Las Vegas to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 21, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $78 (Frontier) |
One-way from | $41 (CheapOair) |
Popular in | March |
Cheapest in | September |
Average price | $97 |
Good round-trip deal | $68 or less |
Good one-way deal | $41 or less |
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 March 21, 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 March 21, 2025.
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Las Vegas to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 21, 2025.
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
Tue 4/29
8:49 am-9:53 am
Nonstop1h 04m
Ontario
Tue 5/6
10:44 am-11:56 am
Nonstop1h 12m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Fri 4/11
9:55 pm-11:00 pm
Nonstop1h 05m
Ontario
Sat 4/12
5:30 am-6:30 am
Nonstop1h 00m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Thu 4/17
6:00 am-11:59 am
1 stop5h 59m
Ontario
Sun 4/20
4:35 pm-9:42 pm
1 stop5h 07m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 5/6
6:05 pm-11:58 pm
1 stop5h 53m
Ontario
Tue 5/13
6:00 am-7:56 pm
2 stops13h 56m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 5/6
4:08 pm-2:25 pm
3 stops22h 17m
Ontario
Tue 5/13
5:05 am-5:51 pm
2 stops12h 46m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Wed 5/21
8:49 am-9:54 am
Nonstop1h 05m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Thu 4/10
7:10 am-11:00 am
1 stop3h 50m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Mon 4/14
6:00 am-11:59 am
1 stop5h 59m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Wed 5/7
2:56 pm-11:58 pm
2 stops9h 02m
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Fri 5/2
4:08 pm-12:24 pm
3 stops20h 16m
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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
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 March 14, 2025.
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 $324). 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?
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 March 21, 2025.
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 24% versus a flight in the afternoon.
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 16, 2025.
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.
Weekly flight availability from Las Vegas to Ontario
Explore weekly flight availability from Las Vegas to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 21, 2025.
The most flights from LAS to ONT are scheduled on a Thursday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals 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
Plan your trip to Ontario by taking into account the average temperature totals 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
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 21, 2025.
To help decide which airline to fly from Las Vegas to Ontario, see what other customers have to say about Southwest, Alaska Airlines and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
Boarding
Entertainment
Food
Crew
Overall
Comfort
Reviews
Merlyn,Feb 2025
LAX - SMF
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.
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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
Discover the top 3 airlines that operate flights from Las Vegas to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 21, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$23 | Average$49 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$38 | Average$68 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$117 | Average$231 | FlexibilityNo cancel fee | On-time63% |