Which airport typically offers the quickest layover for flights from St. Louis to Las Vegas?

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 3h 28m.

What’s the fastest layover option from St. Louis to Las Vegas?

Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 6h 23m.

What’s the top layover airport for flights from St. Louis to Las Vegas?

Denver (DEN) – chosen by Cheapflights users on 82% of 1-stop itineraries from St. Louis to Las Vegas on Cheapflights.

What’s the cheapest layover airport for flights from St. Louis to Las Vegas?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $221.

How popular is this St. Louis to Las Vegas flight route?

Within the past month, 160 users have taken a look at flights from Lambert-St Louis to Las Vegas Harry Reid Intl.

How long is the flight from St. Louis to Las Vegas?

Frontier can get you from St. Louis to Las Vegas in just under 3h 36m. Your travel time will be generally consistent. There are 1367 mi between St. Louis and Las Vegas. Generally, flights for this route are nonstop.

What are the cheapest airlines flying from St. Louis to Las Vegas round-trip?

Cheapflights users have booked flights from St. Louis to Las Vegas round-trip from $79. Other airlines that can offer you cheap pricing are Allegiant Air, from $104, and Frontier, from $107. Spirit Airlines is priced at 73% lower than the current average price of a flight leaving 3 months from now.

In terms of precipitation, rainfall in Las Vegas ranges from 0.1 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. May is typically the driest time to visit Las Vegas when rainfall is around 0.1 in.

If weather is an important factor for your trip to Las Vegas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What are the cheapest flights from St. Louis to Las Vegas?

While on average a flight from St. Louis to Las Vegas is generally $237, our data shows the cheapest flight currently is $102. When looking at the most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), you can expect to pay $133 for that flight.

What are the most popular airlines that fly from St. Louis to Las Vegas?

Consider American Airlines, Alaska Airlines or Delta when booking your flight. These represent the most popular airlines when flying from St. Louis to Las Vegas.

What is the cheapest day to fly round-trip from St. Louis to Las Vegas?

Users have found that leaving on a Sunday can be a cost-effective option. It’s possible to save up to 55% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St. Louis to Las Vegas?

Travelers have found it’s best to book a flight 21 days in advance to save up to 51% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 21 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Las Vegas 1-2 weeks in advance for as low as $220, or $369 for flights within the next 24 hours.

What is the cheapest month to fly from St. Louis to Las Vegas?

February can be a great time to fly to Las Vegas from St. Louis with a flight ticket averaging about $301. Cheapflights users have found deals in the month of February for as cheap as $111. The most expensive prices can be found in the month of June.

What airports do I use to fly from St. Louis to Las Vegas?

If you book a flight from St. Louis to Las Vegas, you will be flying from Lambert-St Louis to Harry Reid Intl. Flights to Las Vegas Harry Reid Intl (LAS) from Lambert-St Louis (STL) take 3h 25m for a nonstop flight. There are 7 flights from Lambert-St Louis to Las Vegas per day from 8 airlines.

Can I find deals for flights from St. Louis to Las Vegas that include hotel bookings?

Yes. In addition to deals on St. Louis to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Las Vegas?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Las Vegas.

Can I find deals for business class flights from St. Louis to Las Vegas?

Yes. Cheapflights offers flight deals from St. Louis to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

How long is the flight from St. Louis to Las Vegas?

The flight from St. Louis to Las Vegas usually takes less than three hours, so you can get checked into your hotel and ready to see the sites in no time.

Which airlines operate flights from St. Louis to Las Vegas?

Two airlines fly between St. Louis and Las Vegas. Southwest Airlines operates the bulk of nonstop flights, and Frontier Airlines also offers direct service between the two cities.

How frequent are flights between St. Louis to Las Vegas?

Airline schedules to Las Vegas vary based on the day of the week, but on most days, you can choose from a minimum of four direct flights from St. Louis.

Which airports serve St. Louis to Las Vegas?

In St. Louis, your flight will depart from the St. Louis Lambert International Airport. If you want to leave your car at home, take the GO BEST airport shuttle or ride the MetroLink light rail from the city to the terminal. Your flight to Vegas arrives at the Las Vegas McCarran International Airport, which lies just a few miles from the iconic Strip.

$98+ Flights from St. Louis to Las Vegas

Q: How much does it cost to fly round-trip from St. Louis to Las Vegas?

Airfare is below average for this route at the moment. St. Louis to Las Vegas flights typically cost between $201 and $413 in September. The cheapest round-trip price found within the last 3 days was $164 on Frontier (Sep 5-Sep 7).

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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.

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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 Lambert-St Louis to Las Vegas Harry Reid Intl are usually found in February or August, booked 86 days in advance, depart on a Monday or Sunday and return on a Friday

Cheap flight deals from St. Louis to Las Vegas

Round-trip from	$164 (Cheapflightsfares)
One-way from	$98 (Cheapflightsfares)
Popular in	June
Cheapest in	February
Average price	$271
Good round-trip deal	$230 or less
Good one-way deal	$138 or less

From Lambert-St Louis to Las Vegas Harry Reid Intl

Search Deals

One-way flight from Lambert-St Louis to Las Vegas Harry Reid Intl

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($26 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Las Vegas Harry Reid Intl.

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Price to beat on a one-way flight from Lambert-St Louis to Las Vegas Harry Reid Intl.

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Find flight deals from St. Louis to Las Vegas

Cheapest flights from St. Louis to Las Vegas
Explore the most affordable flight options available from St. Louis to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

Fri 9/59:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sun 9/78:34 amLAS - STL

Nonstop3h 19mFrontier

Deal found 8/21

$164

Fri 9/129:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sun 9/1412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$165

Mon 10/207:52 pmSTL - LAS

1 stop5h 40mFrontier

Fri 10/246:20 amLAS - STL

Nonstop3h 23mFrontier

Deal found 8/20

$166

Thu 9/47:55 pmSTL - LAS

1 stop5h 38mFrontier

Tue 9/912:33 pmLAS - STL

1 stop18h 33mFrontier

Deal found 8/20

$167

Sat 8/307:54 pmSTL - LAS

1 stop14h 05mFrontier

Wed 9/312:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$168

Sun 9/212:38 pmSTL - LAS

Nonstop3h 38mFrontier

Wed 9/2412:33 pmLAS - STL

1 stop18h 33mFrontier

Deal found 8/20

$169

Sat 10/44:58 pmSTL - LAS

Nonstop3h 37mFrontier

Fri 10/108:05 pmLAS - STL

1 stop11h 02mFrontier

Deal found 8/21

$170

Fri 9/57:55 pmSTL - LAS

1 stop5h 38mFrontier

Fri 9/512:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$171

Fri 10/39:35 pmSTL - LAS

Nonstop3h 36mFrontier

Wed 10/81:41 pmLAS - STL

1 stop17h 26mFrontier

Deal found 8/21

$172

Mon 9/152:38 pmSTL - LAS

Nonstop3h 38mFrontier

Thu 9/188:34 amLAS - STL

Nonstop3h 19mFrontier

Deal found 8/21

$173

Fri 10/37:55 pmSTL - LAS

1 stop26h 56mFrontier

Sun 10/512:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$175

Best flights from St. Louis to Las Vegas
Discover carefully curated flight deals from St. Louis to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2025.

Mon 9/159:29 pmSTL - LAS

Nonstop3h 36mFrontier

Mon 9/225:14 pmLAS - STL

1 stop13h 52mFrontier

Deal found 8/21

$165

Tue 9/167:55 pmSTL - LAS

1 stop5h 38mFrontier

Tue 9/2312:33 pmLAS - STL

1 stop18h 33mFrontier

Deal found 8/20

$167

Thu 11/136:22 pmSTL - LAS

1 stop7h 14mFrontier

Mon 11/172:47 pmLAS - STL

Nonstop3h 25mFrontier

Deal found 8/21

$168

Sat 9/67:55 pmSTL - LAS

1 stop5h 38mFrontier

Sat 9/1310:35 amLAS - STL

Nonstop3h 28mFrontier

Deal found 8/21

$168

Fri 9/129:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sun 9/1412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/20

$168

Thu 10/237:52 pmSTL - LAS

1 stop5h 40mFrontier

Sat 10/2512:17 amLAS - STL

1 stop7h 05mFrontier

Deal found 8/19

$169

Sat 9/134:58 pmSTL - LAS

Nonstop3h 37mFrontier

Wed 9/1712:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$170

Sat 10/44:58 pmSTL - LAS

Nonstop3h 37mFrontier

Fri 10/108:05 pmLAS - STL

1 stop11h 02mFrontier

Deal found 8/21

$170

Tue 10/77:52 pmSTL - LAS

1 stop25h 03mFrontier

Fri 10/106:20 amLAS - STL

Nonstop3h 23mFrontier

Deal found 8/21

$171

Thu 9/254:00 pmSTL - LAS

2 stops33h 50mFrontier

Sat 9/2710:35 amLAS - STL

Nonstop3h 28mFrontier

Deal found 8/20

$173

Sat 9/274:58 pmSTL - LAS

Nonstop3h 37mFrontier

Sat 9/2712:55 amLAS - STL

1 stop6h 59mFrontier

Deal found 8/21

$174

Thu 10/27:55 pmSTL - LAS

1 stop5h 38mFrontier

Wed 10/812:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 8/20

$174

Last-minute flights from St. Louis to Las Vegas
Discover last-minute flight deals from St. Louis to Las Vegas. Data last updated August 21, 2025 and is based on user searches.

Sat 8/307:54 pmSTL - LAS

1 stop14h 05mFrontier

Wed 9/312:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$168

Thu 9/47:55 pmSTL - LAS

1 stop5h 38mFrontier

Tue 9/912:33 pmLAS - STL

1 stop18h 33mFrontier

Deal found 8/20

$167

Fri 9/59:35 pmSTL - LAS

Nonstop3h 36mFrontier

Mon 9/812:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/20

$164

Fri 9/57:55 pmSTL - LAS

1 stop5h 38mFrontier

Fri 9/512:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$171

Sat 9/64:58 pmSTL - LAS

Nonstop3h 37mFrontier

Mon 9/812:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/20

$170

Sat 9/64:58 pmSTL - LAS

Nonstop3h 37mFrontier

Sun 9/78:34 amLAS - STL

Nonstop3h 19mFrontier

Deal found 8/21

$172

Mon 9/89:29 pmSTL - LAS

Nonstop3h 36mFrontier

Thu 9/188:34 amLAS - STL

Nonstop3h 19mFrontier

Deal found 8/21

$175

Fri 9/129:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sun 9/1412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/21

$165

Mon 9/152:38 pmSTL - LAS

Nonstop3h 38mFrontier

Thu 9/188:34 amLAS - STL

Nonstop3h 19mFrontier

Deal found 8/21

$173

Sun 9/212:38 pmSTL - LAS

Nonstop3h 38mFrontier

Wed 9/2412:33 pmLAS - STL

1 stop18h 33mFrontier

Deal found 8/20

$169

Mon 9/229:29 pmSTL - LAS

Nonstop3h 36mFrontier

Thu 9/2512:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 8/20

$166

One-way flights from St. Louis to Las Vegas
Search for one-way flight options from St. Louis to Las Vegas. Find affordable one-way fares based on user searches. Data last updated August 21, 2025.

Sat 10/254:51 pmSTL - LAS

Nonstop3h 39mFrontier

Deal found 8/21

$98

Sat 9/204:58 pmSTL - LAS

Nonstop3h 37mFrontier

Deal found 8/20

$99

Tue 10/77:52 pmSTL - LAS

1 stop15h 10mFrontier

Deal found 8/20

$101

Fri 11/77:45 pmSTL - LAS

1 stop5h 47mFrontier

Deal found 8/20

$103

Thu 11/67:45 pmSTL - LAS

1 stop5h 47mFrontier

Deal found 8/21

$106

Mon 9/299:29 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 8/21

$108

Thu 11/209:37 pmSTL - LAS

Nonstop3h 45mFrontier

Deal found 8/21

$109

Sat 11/157:45 pmSTL - LAS

1 stop14h 17mFrontier

Deal found 8/21

$113

Thu 11/132:42 pmSTL - LAS

Nonstop3h 40mFrontier

Deal found 8/20

$114

Sun 9/214:00 pmSTL - LAS

1 stop26h 41mFrontier

Deal found 8/21

$116

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Las Vegas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 9/15

9:29 pm-11:05 pm

Nonstop3h 36m

Las Vegas Harry Reid Intl

Mon 9/22

5:14 pm-9:06 am

1 stop13h 52m

$165

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 9/16

7:55 pm-11:33 pm

1 stop5h 38m

Las Vegas Harry Reid Intl

Tue 9/23

12:33 pm-9:06 am

1 stop18h 33m

$167

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 11/13

6:22 pm-11:36 pm

1 stop7h 14m

Las Vegas Harry Reid Intl

Mon 11/17

2:47 pm-8:12 pm

Nonstop3h 25m

$168

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 9/6

7:55 pm-11:33 pm

1 stop5h 38m

Las Vegas Harry Reid Intl

Sat 9/13

10:35 am-4:03 pm

Nonstop3h 28m

$168

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 9/12

9:35 pm-11:11 pm

Nonstop3h 36m

Las Vegas Harry Reid Intl

Sun 9/14

12:59 am-9:06 am

1 stop6h 07m

$168

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 10/23

7:52 pm-11:32 pm

1 stop5h 40m

Las Vegas Harry Reid Intl

Sat 10/25

12:17 am-9:22 am

1 stop7h 05m

$169

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 9/13

4:58 pm-6:35 pm

Nonstop3h 37m

Las Vegas Harry Reid Intl

Wed 9/17

12:59 am-9:06 am

1 stop6h 07m

$170

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 10/4

4:58 pm-6:35 pm

Nonstop3h 37m

Las Vegas Harry Reid Intl

Fri 10/10

8:05 pm-9:07 am

1 stop11h 02m

$170

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 10/7

7:52 pm-6:55 pm

1 stop25h 03m

Las Vegas Harry Reid Intl

Fri 10/10

6:20 am-11:43 am

Nonstop3h 23m

$171

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 9/25

4:00 pm-11:50 pm

2 stops33h 50m

Las Vegas Harry Reid Intl

Sat 9/27

10:35 am-4:03 pm

Nonstop3h 28m

$173

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/21

Showing 1-10 of 21 results

The best insider tips for St. Louis to Las Vegas flights

Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Las Vegas trip

Airports

STL

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.

LAS

For rideshare pickups at LAS, head to the parking garage. Request your ride closer to the garage to avoid long waits.

Our travel experts

Taryn White

Expert on STL

Ramsey Qubein

Expert on LAS

Best time to book a flight from St. Louis to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Las Vegas

Prices

How far ahead should I book a flight from St. Louis to Las Vegas?

Booking 86 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.

What is the cheapest month to book a flight from St. Louis to Las Vegas?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Las Vegas (average of $198). Flying from St. Louis to Las Vegas in March is currently the most expensive (average of $269). 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 STL to LAS?

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.

What is the cheapest day to fly from St. Louis to Las Vegas?

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.

How much does it cost to fly round-trip from St. Louis to Las Vegas?

Reviews of airlines servicing Las Vegas

See what other customers who have flown with Southwest, United Airlines, and American Airlines from St. Louis to Las Vegas have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,245 reviews

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

8,930 reviews

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Spirit Airlines

6.3

Okay

8,035 reviews

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Frontier

5.8

Fair

3,207 reviews

Southwest

8.0

Very good

4,245 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

St. Louis to Las Vegas Travel Guide

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.

Related info for your journey

How long is the flight from St. Louis to Las Vegas?
The flight from St. Louis to Las Vegas usually takes less than three hours, so you can get checked into your hotel and ready to see the sites in no time.
Which airlines operate flights from St. Louis to Las Vegas?
Two airlines fly between St. Louis and Las Vegas. Southwest Airlines operates the bulk of nonstop flights, and Frontier Airlines also offers direct service between the two cities.
How frequent are flights between St. Louis to Las Vegas?
Airline schedules to Las Vegas vary based on the day of the week, but on most days, you can choose from a minimum of four direct flights from St. Louis.
Which airports serve St. Louis to Las Vegas?
In St. Louis, your flight will depart from the St. Louis Lambert International Airport. If you want to leave your car at home, take the GO BEST airport shuttle or ride the MetroLink light rail from the city to the terminal. Your flight to Vegas arrives at the Las Vegas McCarran International Airport, which lies just a few miles from the iconic Strip.
Which direct flight route between St. Louis to Las Vegas is cheapest?
Of the two airlines that fly the St. Louis to Las Vegas route, Frontier tends to offer lower prices. Before you book, be sure to check baggage fees, as they can add a large amount to the final ticket price.
What airports do I use to fly from St. Louis to Las Vegas?
If you book a flight from St. Louis to Las Vegas, you will be flying from Lambert-St Louis to Harry Reid Intl. Flights to Las Vegas Harry Reid Intl (LAS) from Lambert-St Louis (STL) take 3h 25m for a nonstop flight. There are 7 flights from Lambert-St Louis to Las Vegas per day from 8 airlines.
How popular is this St. Louis to Las Vegas flight route?
Within the past month, 160 users have taken a look at flights from Lambert-St Louis to Las Vegas Harry Reid Intl.
How long is the flight from St. Louis to Las Vegas?
Frontier can get you from St. Louis to Las Vegas in just under 3h 36m. Your travel time will be generally consistent. There are 1367 mi between St. Louis and Las Vegas. Generally, flights for this route are nonstop.
What are the cheapest airlines flying from St. Louis to Las Vegas round-trip?
Cheapflights users have booked flights from St. Louis to Las Vegas round-trip from $79. Other airlines that can offer you cheap pricing are Allegiant Air, from $104, and Frontier, from $107. Spirit Airlines is priced at 73% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest flights from St. Louis to Las Vegas?
While on average a flight from St. Louis to Las Vegas is generally $237, our data shows the cheapest flight currently is $102. When looking at the most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), you can expect to pay $133 for that flight.
Can I find deals for flights from St. Louis to Las Vegas that include hotel bookings?
Yes. In addition to deals on St. Louis to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Las Vegas?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Las Vegas.
Can I find deals for business class flights from St. Louis to Las Vegas?
Yes. Cheapflights offers flight deals from St. Louis to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Las Vegas?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Las Vegas (average of $198). Flying from St. Louis to Las Vegas in March is currently the most expensive (average of $269). 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.

See more FAQs

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Top 8 airlines flying from St. Louis to Las Vegas

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$79	Average$179	FlexibilityNo cancel fee	On-time65%
Allegiant Air	Cheapest$104	Average$238	FlexibilityNo cancel fee	On-time88%
Frontier	Cheapest$107	Average$243	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$173	Average$431	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$194	Average$381	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$258	Average$426	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$272	Average$463	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$342	Average$403	FlexibilityNo cancel fee	On-time75%

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$98+ Cheap flights from St. Louis to Las Vegas (STL - LAS)

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Lambert-St Louis to Las Vegas Harry Reid Intl are usually found in February or August, booked 86 days in advance, depart on a Monday or Sunday and return on a Friday

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Cheapest flights from St. Louis to Las VegasExplore the most affordable flight options available from St. Louis to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

Explore the most affordable flight options available from St. Louis to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

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Reviews of airlines servicing Las Vegas

See what other customers who have flown with Southwest, United Airlines, and American Airlines from St. Louis to Las Vegas have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

St. Louis to Las Vegas Travel Guide

Related info for your journey

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Top 8 airlines flying from St. Louis to Las Vegas

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Cheapest flights from St. Louis to Las Vegas
Explore the most affordable flight options available from St. Louis to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.