Expect security screening at STL to take 5-10 minutes during off-peak times. Check real-time wait times online before heading to the airport.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $124 (Kiwi.com) |
One-way from | $64 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $282 |
Good round-trip deal | $165 or less |
Good one-way deal | $99 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 1/20
2:50 pm-9:00 pm
1 stop8h 10m
Las Vegas Harry Reid Intl
Thu 1/22
3:50 pm-9:06 pm
Nonstop3h 16m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Wed 4/29
9:00 am-1:04 pm
1 stop6h 04m
Las Vegas Harry Reid Intl
Sat 5/2
12:59 am-9:42 am
1 stop6h 43m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Sat 2/28
6:10 am-2:52 pm
2 stops10h 42m
Las Vegas Harry Reid Intl
Mon 3/2
6:10 am-2:56 pm
1 stop6h 46m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Fri 1/9
7:00 am-3:56 pm
2 stops10h 56m
Las Vegas Harry Reid Intl
Tue 1/13
6:15 am-3:00 pm
1 stop6h 45m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 4/28
6:00 am-11:01 am
1 stop7h 01m
Las Vegas Harry Reid Intl
Sat 5/2
12:15 pm-8:21 pm
1 stop6h 06m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Fri 3/13
5:29 pm-11:30 pm
1 stop8h 01m
Las Vegas Harry Reid Intl
Mon 3/16
12:50 am-8:50 am
1 stop6h 00m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 1/6
6:10 am-12:36 pm
1 stop8h 26m
Las Vegas Harry Reid Intl
Wed 1/7
11:00 am-11:25 pm
2 stops10h 25m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Tue 1/6
7:45 pm-9:30 pm
Nonstop3h 45m
Las Vegas Harry Reid Intl
Wed 1/7
11:50 am-5:00 pm
Nonstop3h 10m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Sun 2/22
6:40 pm-11:22 pm
1 stop6h 42m
Las Vegas Harry Reid Intl
Tue 2/24
11:05 am-11:23 pm
2 stops10h 18m
St. LouisLas Vegas
STL - LAS
STLLAS
Lambert-St Louis
Wed 4/1
2:22 pm-6:08 pm
1 stop5h 46m
Las Vegas Harry Reid Intl
Sun 4/5
5:00 pm-12:18 am
1 stop5h 18m
| 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 Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 20 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Las Vegas. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, March is the cheapest month in which you can book a flight from St. Louis to Las Vegas (average of $106). Flying from St. Louis to Las Vegas in July is currently the most expensive (average of $195). 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.
It’s typically best to fly out from St. Louis to Las Vegas in the evening. Doing so could potentially save you 50% on the flight price compared to flying in the morning, which is usually more expensive.
Travelers seeking maximum savings on their St. Louis to Las Vegas flight should consider departing on Monday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
About 14% of weekly flights between St. Louis and Las Vegas have experienced delays in the past year, with the average delay time being 130 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.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Southwest have had the lowest number of delays on this route, with just 14% of flights being delayed.
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Crew
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Las Vegas, with its wild atmosphere and brilliant lights, is a thrilling spot for a vacation. Whether you're visiting with the family or coming with friends, the city's energy and exuberance is sure to draw you in. From the always-busy casinos of the Strip to the classic style of Fremont Street, every inch of the city is designed to provide fun-filled memories to last a lifetime. Best of all? The Vegas attractions all sit just a quick flight from St. Louis.
Every inch of Las Vegas is designed to make an impression. Start your trip off with a bang by jumping off the edge of the Stratosphere casino and falling 829 feet on the heart-pounding Sky Jump. Closer to the south end of the Strip, get a thrill on the roller coaster that runs over the New York New York casino. Want to stay close to the earth? Opt for a boat ride through the canals of the elegant Venetian hotel and casino. When you're ready for a break from gambling, check out the Hispanic Museum of Nevada or go for a hair-raising spin in a stock care around the track of the Las Vegas Motor Speedway.
Check out prices for your trip to Las Vegas today using the Cheapflights smart search engine. Simply enter your dates to see all available times and prices.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$103 | Average$210 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$113 | Average$243 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$392 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$161 | Average$370 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$234 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$401 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$272 | Average$476 | FlexibilityNo cancel fee | On-time63% |