ONT offers quick security checks, making it a convenient choice over LAX for a stress-free departure.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $53 (Frontier) |
One-way from | $34 (Super.com) |
Popular in | October |
Cheapest in | March |
Average price | $122 |
Good round-trip deal | $119 or less |
Good one-way deal | $86 or less |
Fly from
Fly to
Route
Depart
Return
Price
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Tue 1/13
5:55 am-10:15 am
1 stop4h 20m
Las Vegas Harry Reid Intl
Sat 1/17
5:50 am-12:55 pm
2 stops7h 05m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Wed 2/11
11:15 am-3:25 pm
1 stop4h 10m
Las Vegas Harry Reid Intl
Thu 2/12
4:40 pm-9:50 pm
2 stops5h 10m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 12/25
12:45 pm-1:50 pm
Nonstop1h 05m
Las Vegas Harry Reid Intl
Thu 12/25
3:35 pm-8:55 pm
1 stop5h 20m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Fri 1/9
3:30 pm-10:44 pm
1 stop7h 14m
Las Vegas Harry Reid Intl
Tue 1/13
11:00 am-10:51 pm
1 stop11h 51m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 12/8
8:40 am-9:45 am
Nonstop1h 05m
Las Vegas Harry Reid Intl
Wed 12/10
8:35 am-9:35 am
Nonstop1h 00m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Fri 1/9
5:07 pm-9:55 am
2 stops16h 48m
Las Vegas Harry Reid Intl
Wed 1/14
11:00 am-10:51 pm
1 stop11h 51m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Mon 12/15
11:10 am-4:05 pm
2 stops4h 55m
Las Vegas Harry Reid Intl
Wed 12/17
7:00 am-10:35 am
1 stop3h 35m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Sun 1/11
3:30 pm-9:55 am
1 stop18h 25m
Las Vegas Harry Reid Intl
Tue 1/13
6:05 am-1:56 pm
1 stop7h 51m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Tue 12/16
5:25 pm-10:00 pm
1 stop4h 35m
Las Vegas Harry Reid Intl
Fri 12/19
5:15 pm-10:20 pm
2 stops5h 05m
OntarioLas Vegas
ONT - LAS
ONTLAS
Ontario
Thu 12/11
7:00 am-12:35 pm
1 stop5h 35m
Las Vegas Harry Reid Intl
Fri 12/12
6:45 am-9:55 am
1 stop3h 10m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from Ontario to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, January is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $37). Flying from Ontario to Las Vegas in July is currently the most expensive (average of $49). 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.
A simple way to save on the total cost of your ticket is to fly from Ontario to Las Vegas at noon. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight in the afternoon.
Travelers seeking maximum savings on their Ontario to Las Vegas flight should consider departing on Sunday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
About 13% of weekly flights between Ontario and Las Vegas have experienced delays in the past year, with the average delay time being 108 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, TezJet have had the lowest number of delays on this route, with no flights being classified as delayed.
Comfort
Entertainment
Food
Boarding
Overall
Crew
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Entertainment
Food
Boarding
Overall
Crew
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Entertainment
Food
Boarding
Overall
Crew
Reviews
Walter,Aug 2025
OAK - SAN
Comfort
Entertainment
Food
Boarding
Overall
Crew
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$24 | Average$81 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$47 | Average$109 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$97 | Average$233 | FlexibilityNo cancel fee | On-time63% |