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.

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.

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.

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

Within the past month, 167 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?

United Airlines and Delta can get you from St. Louis to Las Vegas in just under 6h 25m. Your travel time can differ by up to 1h 21m. There are 1367 mi between St. Louis and Las Vegas. Both multi-stop and nonstop flights can be found to your destination and back.

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 $93. Other airlines that can offer you cheap pricing are Allegiant Air, from $104, and Frontier, from $109. Spirit Airlines is priced at 68% 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 $227, our data shows the cheapest flight currently is $78. When looking at the most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), you can expect to pay $138 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 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 30m 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.

$43+ 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 $198 and $412 in November. The cheapest round-trip price found within the last 3 days was $137 on Frontier (Nov 1-Nov 5).

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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.

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 Lambert-St Louis to Las Vegas Harry Reid Intl are usually found in February or November, booked 75 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	$137 (Frontier)
One-way from	$43 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$284
Good round-trip deal	$176 or less
Good one-way deal	$123 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. 8% potential increase in price ($28 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 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 September 16, 2025.

Sat 11/14:51 pmSTL - LAS

Nonstop3h 39mFrontier

Wed 11/512:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/15

$137

Mon 10/64:00 pmSTL - LAS

1 stop7h 23mFrontier

Mon 10/612:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/15

$139

Tue 9/307:55 pmSTL - LAS

1 stop5h 38mFrontier

Thu 10/212:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/16

$141

Fri 11/72:12 pmSTL - LAS

1 stop21h 55mFrontier

Mon 11/108:48 pmLAS - STL

1 stop10h 19mFrontier

Deal found 9/16

$142

Tue 9/237:55 pmSTL - LAS

1 stop5h 38mFrontier

Wed 9/2412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/14

$143

Mon 11/107:45 pmSTL - LAS

1 stop5h 44mFrontier

Fri 11/148:48 pmLAS - STL

1 stop10h 19mFrontier

Deal found 9/14

$144

Sat 9/277:55 pmSTL - LAS

1 stop14h 07mFrontier

Sat 10/44:10 pmLAS - STL

1 stop14h 56mFrontier

Deal found 9/15

$145

Sun 10/52:38 pmSTL - LAS

Nonstop3h 38mFrontier

Sat 10/1112:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/13

$146

Wed 12/37:43 pmSTL - LAS

1 stop6h 02mFrontier

Fri 12/512:59 amLAS - STL

1 stop7h 03mFrontier

Deal found 9/15

$147

Tue 9/237:55 pmSTL - LAS

1 stop5h 38mFrontier

Fri 9/263:15 pmLAS - STL

Nonstop3h 25mFrontier

Deal found 9/14

$148

Sat 9/207:55 pmSTL - LAS

1 stop5h 38mFrontier

Fri 9/2612:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/13

$149

Fri 10/39:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sat 10/412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/14

$150

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 September 16, 2025.

Wed 11/265:24 pmSTL - LAS

1 stop6h 25mUnited Airlines

Tue 12/21:01 pmLAS - STL

1 stop5h 56mUnited Airlines

Deal found 9/14

$167

Tue 12/26:30 amSTL - LAS

1 stop7h 46mDelta

Sat 12/66:05 amLAS - STL

1 stop8h 44mDelta

Deal found 9/15

$217

Sun 12/712:49 pmSTL - LAS

1 stop9h 02mDelta

Thu 12/116:00 amLAS - STL

1 stop5h 30mDelta

Deal found 9/15

$217

Wed 11/265:24 pmSTL - LAS

1 stop6h 25mUnited Airlines

Wed 12/32:41 pmLAS - STL

1 stop6h 04mUnited Airlines

Deal found 9/14

$247

Tue 11/254:43 pmSTL - LAS

1 stop6h 03mUnited Airlines

Wed 12/32:41 pmLAS - STL

1 stop6h 04mUnited Airlines

Deal found 9/14

$247

Sat 12/65:30 pmSTL - LAS

1 stop9h 15mUnited Airlines

Tue 12/98:05 amLAS - STL

2 stops10h 52mUnited Airlines

Deal found 9/14

$252

Tue 12/99:00 amSTL - LAS

2 stops10h 58mUnited Airlines

Sat 12/1311:53 pmLAS - STL

1 stop8h 14mUnited Airlines

Deal found 9/14

$252

Sat 10/113:23 pmSTL - LAS

2 stops10h 52mUnited Airlines

Wed 10/1512:32 pmLAS - STL

1 stop9h 25mUnited Airlines

Deal found 9/14

$252

Wed 12/109:00 amSTL - LAS

2 stops13h 01mUnited Airlines

Fri 12/1211:59 pmLAS - STL

1 stop8h 47mUnited Airlines

Deal found 9/13

$252

Mon 11/105:24 pmSTL - LAS

1 stop6h 25mUnited Airlines

Thu 11/1310:40 amLAS - STL

2 stops9h 14mUnited Airlines

Deal found 9/15

$252

Tue 11/410:00 amSTL - LAS

2 stops12h 07mUnited Airlines

Sat 11/85:55 amLAS - STL

2 stops8h 33mUnited Airlines

Deal found 9/15

$257

Wed 10/2212:25 pmSTL - LAS

2 stops10h 02mUnited Airlines

Tue 11/186:00 amLAS - STL

2 stops8h 28mUnited Airlines

Deal found 9/15

$257

Last-minute flights from St. Louis to Las Vegas
Discover last-minute flight deals from St. Louis to Las Vegas. Data last updated September 16, 2025 and is based on user searches.

Sat 9/207:55 pmSTL - LAS

1 stop5h 38mFrontier

Fri 9/2612:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/13

$149

Tue 9/237:55 pmSTL - LAS

1 stop5h 38mFrontier

Thu 9/2512:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/14

$143

Fri 9/267:55 pmSTL - LAS

1 stop26h 56mFrontier

Sun 9/286:00 amLAS - STL

1 stop25h 06mFrontier

Deal found 9/14

$151

Sat 9/277:55 pmSTL - LAS

1 stop5h 38mFrontier

Mon 9/2912:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/15

$142

Sat 9/277:55 pmSTL - LAS

1 stop14h 07mFrontier

Sat 10/44:10 pmLAS - STL

1 stop14h 56mFrontier

Deal found 9/15

$145

Tue 9/307:55 pmSTL - LAS

1 stop5h 38mFrontier

Thu 10/212:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/16

$141

Fri 10/39:35 pmSTL - LAS

Nonstop3h 36mFrontier

Sat 10/412:59 amLAS - STL

1 stop6h 07mFrontier

Deal found 9/14

$150

Sun 10/52:38 pmSTL - LAS

Nonstop3h 38mFrontier

Sat 10/1112:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/13

$146

Mon 10/64:00 pmSTL - LAS

1 stop7h 23mFrontier

Mon 10/612:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/15

$139

Wed 10/157:52 pmSTL - LAS

1 stop5h 37mFrontier

Fri 10/1712:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/14

$144

Thu 10/306:22 pmSTL - LAS

1 stop7h 14mFrontier

Mon 11/312:59 amLAS - STL

1 stop6h 08mFrontier

Deal found 9/14

$152

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 September 16, 2025.

Sat 11/84:51 pmSTL - LAS

Nonstop3h 39mFrontier

Deal found 9/14

$43

Mon 10/69:29 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 9/14

$44

Mon 9/299:29 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 9/14

$66

Sat 9/204:58 pmSTL - LAS

Nonstop3h 37mFrontier

Deal found 9/14

$71

Thu 11/66:22 pmSTL - LAS

1 stop7h 14mFrontier

Deal found 9/14

$72

Sun 11/27:45 pmSTL - LAS

1 stop18h 22mFrontier

Deal found 9/14

$77

Fri 10/1710:59 pmSTL - LAS

1 stop12h 20mFrontier

Deal found 9/15

$78

Fri 10/249:59 pmSTL - LAS

Nonstop3h 38mFrontier

Deal found 9/16

$79

Sun 10/2610:17 amSTL - LAS

1 stop7h 40mFrontier

Deal found 9/14

$80

Wed 12/37:43 pmSTL - LAS

1 stop6h 02mFrontier

Deal found 9/14

$82

Mon 12/156:15 amSTL - LAS

1 stop7h 41mUnited Airlines

Deal found 9/15

$84

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

Wed 11/26

5:24 pm-9:49 pm

1 stop6h 25m

Las Vegas Harry Reid Intl

Tue 12/2

1:01 pm-8:57 pm

1 stop5h 56m

$167

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 12/2

6:30 am-12:16 pm

1 stop7h 46m

Las Vegas Harry Reid Intl

Sat 12/6

6:05 am-4:49 pm

1 stop8h 44m

$217

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 12/7

12:49 pm-7:51 pm

1 stop9h 02m

Las Vegas Harry Reid Intl

Thu 12/11

6:00 am-1:30 pm

1 stop5h 30m

$217

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 11/26

5:24 pm-9:49 pm

1 stop6h 25m

Las Vegas Harry Reid Intl

Wed 12/3

2:41 pm-10:45 pm

1 stop6h 04m

$247

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 11/25

4:43 pm-8:46 pm

1 stop6h 03m

Las Vegas Harry Reid Intl

Wed 12/3

2:41 pm-10:45 pm

1 stop6h 04m

$247

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 12/6

5:30 pm-12:45 am

1 stop9h 15m

Las Vegas Harry Reid Intl

Tue 12/9

8:05 am-8:57 pm

2 stops10h 52m

$252

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 12/9

9:00 am-5:58 pm

2 stops10h 58m

Las Vegas Harry Reid Intl

Sat 12/13

11:53 pm-10:07 am

1 stop8h 14m

$252

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 10/11

3:23 pm-12:15 am

2 stops10h 52m

Las Vegas Harry Reid Intl

Wed 10/15

12:32 pm-11:57 pm

1 stop9h 25m

$252

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 12/10

9:00 am-8:01 pm

2 stops13h 01m

Las Vegas Harry Reid Intl

Fri 12/12

11:59 pm-10:46 am

1 stop8h 47m

$252

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 11/10

5:24 pm-9:49 pm

1 stop6h 25m

Las Vegas Harry Reid Intl

Thu 11/13

10:40 am-9:54 pm

2 stops9h 14m

$252

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 23 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 75 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, Delta, and United 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

4,242 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

4,242 reviews

Southwest

8.0

Very good

4,242 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

Delta

8.0

Very good

7,957 reviews

Southwest

8.0

Very good

4,242 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

8,924 reviews

Southwest

8.0

Very good

4,242 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

4,242 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

3,174 reviews

Southwest

8.0

Very good

4,242 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 30m 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, 167 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?
United Airlines and Delta can get you from St. Louis to Las Vegas in just under 6h 25m. Your travel time can differ by up to 1h 21m. There are 1367 mi between St. Louis and Las Vegas. Both multi-stop and nonstop flights can be found to your destination and back.
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 $93. Other airlines that can offer you cheap pricing are Allegiant Air, from $104, and Frontier, from $109. Spirit Airlines is priced at 68% 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 $227, our data shows the cheapest flight currently is $78. When looking at the most popular route, (Lambert-St Louis - Las Vegas Harry Reid Intl), you can expect to pay $138 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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Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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Other flights to Las Vegas

Top 8 airlines flying from St. Louis to Las Vegas

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$93	Average$184	FlexibilityNo cancel fee	On-time65%
Allegiant Air	Cheapest$104	Average$238	FlexibilityNo cancel fee	On-time88%
Frontier	Cheapest$109	Average$242	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$171	Average$421	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$194	Average$382	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$258	Average$421	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$273	Average$472	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$342	Average$403	FlexibilityNo cancel fee	On-time75%

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$43+ 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 11/8. 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 November, booked 75 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 September 16, 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 September 16, 2025.

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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 September 16, 2025.