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Cheap flights from St. Louis to Las Vegas from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Las Vegas departing on 2/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
5:30 am - 1:56 pm
LAS
-
STL
6h 26m
1 stop
$122Frontier
Mon, Feb 23 - Sat, Feb 28
Frontier Logo
6:41 pm - 8:31 pm
STL
-
LAS
3h 50mnonstop
Frontier Logo
11:03 pm - 10:27 pm
LAS
-
STL
21h 24m
1 stop
$123Frontier
Sat, Feb 14 - Tue, Feb 17
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
8:35 pm - 1:09 pm
LAS
-
STL
14h 34m
1 stop
$124Frontier
Mon, Feb 16 - Thu, Feb 19
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
11:03 pm - 11:59 pm
LAS
-
STL
22h 56m
1 stop
$125Frontier
Mon, Feb 16 - Wed, Feb 18
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
3:57 pm - 9:13 pm
LAS
-
STL
3h 16mnonstop
$127Frontier
Thu, Feb 26 - Mon, Mar 2
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
$128Frontier
Fri, Feb 27 - Thu, Mar 5
Frontier Logo
6:41 pm - 8:31 pm
STL
-
LAS
3h 50mnonstop
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
$129Frontier
Sat, Feb 28 - Thu, Mar 5
Frontier Logo
3:28 pm - 9:49 am
STL
-
LAS
20h 21m
2 stops
Frontier Logo
12:22 pm - 5:46 pm
LAS
-
STL
3h 24mnonstop
$133Frontier
Wed, Feb 11 - Sat, Feb 14
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
6:50 am - 8:02 pm
LAS
-
STL
11h 12m
1 stop
$136Frontier
Fri, Feb 20 - Mon, Feb 23
Frontier Logo
9:45 pm - 11:44 pm
STL
-
LAS
3h 59mnonstop
Frontier Logo
1:16 pm - 12:08 pm
LAS
-
STL
20h 52m
1 stop
$137Frontier
Mon, Feb 2 - Thu, Feb 5

Frontier flights from St. Louis to Las Vegas

Our best Frontier deals on St. Louis to Las Vegas flight tickets
Frontier
Feb 20
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
Feb 27
LAS6:30 amLas Vegas Harry Reid Intl
11h 37m
1 stop
STL8:07 pmLambert-St Louis
$122
Frontier
Feb 14
STL2:51 pmLambert-St Louis
21h 49m
1 stop
LAS10:40 amLas Vegas Harry Reid Intl
Feb 21
LAS12:22 pmLas Vegas Harry Reid Intl
3h 24m
STL5:46 pmLambert-St Louis
$123
Frontier
Feb 16
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
Feb 19
LAS8:35 pmLas Vegas Harry Reid Intl
14h 34m
1 stop
STL1:09 pmLambert-St Louis
$124

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Las Vegas 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, momondo users made 832,500 searches. Data last updated January 21, 2026.
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 2/23

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Sat 2/28

5:30 am-1:56 pm

1 stop6h 26m

$122

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 2/14

6:41 pm-8:31 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Tue 2/17

11:03 pm-10:27 pm

1 stop21h 24m

$123

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/16

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Thu 2/19

8:35 pm-1:09 pm

1 stop14h 34m

$124

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/16

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Wed 2/18

11:03 pm-11:59 pm

1 stop22h 56m

$125

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 2/26

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Mon 3/2

3:57 pm-9:13 pm

Nonstop3h 16m

$127

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 2/27

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Thu 3/5

4:10 pm-9:26 pm

Nonstop3h 16m

$128

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 2/28

6:41 pm-8:31 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Thu 3/5

4:10 pm-9:26 pm

Nonstop3h 16m

$129

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 2/11

3:28 pm-9:49 am

2 stops20h 21m

Las Vegas Harry Reid Intl

Sat 2/14

12:22 pm-5:46 pm

Nonstop3h 24m

$133

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 2/20

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Mon 2/23

6:50 am-8:02 pm

1 stop11h 12m

$136

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/2

9:45 pm-11:44 pm

Nonstop3h 59m

Las Vegas Harry Reid Intl

Thu 2/5

1:16 pm-12:08 pm

1 stop20h 52m

$137

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Las Vegas from

How to get the cheapest flight ticket from St. Louis to Las Vegas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Las Vegas?

The month of February is, on average, the cheapest month to fly to Las Vegas from St. Louis, with most prices found around $230. The month of January is another great option to travel to Las Vegas, with average flight prices from St. Louis averaging around $256.

What is the cheapest day to depart on your flight to Las Vegas?

Our data shows that Monday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $245. Flights from St. Louis to Las Vegas on a Wednesday will generally be more expensive and average around $402. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Las Vegas?

The cheapest time of day to fly to Las Vegas is in the evening when flights can be purchased for as low as $249. Flights to Las Vegas are more costly in the morning, with an average ticket price of $493. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Las Vegas Harry Reid Intl flight route?

Fly from Lambert-St Louis to Las Vegas Harry Reid Intl for the best Lambert-St Louis - Las Vegas Harry Reid Intl flight prices

How far in advance should I book a flight to Las Vegas?

You are more likely to see cheaper flights to Las Vegas from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $291 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from St. Louis for as low as $252 on momondo.

What cabin class options are available on Lambert-St Louis to Las Vegas Harry Reid Intl flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Las Vegas flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Las Vegas.

How have St. Louis to Las Vegas flight prices changed over time?

As of January 2026, prices for St. Louis to Las Vegas flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Las Vegas

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Las Vegas according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Las Vegas (STL to LAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Las Vegas

Best Price Found

$113

Fastest flight time

3h 25m

Direct flights

Every day

Airports in Las Vegas

1 airport
The best one-way flight to Las Vegas from St. Louis in the past 72 hours is $113. The best round-trip flight deal from St. Louis to Las Vegas found on momondo in the last 72 hours is $220.
The fastest flight from St. Louis to Las Vegas takes 3h 25m
Direct flights go from St. Louis to Las Vegas every day.
There is 1 airport in Las Vegas. From St. Louis there are direct flights to Las Vegas Harry Reid Intl (LAS).
Search flight deals

  • How far is Lambert-St Louis to Las Vegas Harry Reid Intl by plane?

    The straight-line distance from Lambert-St Louis to Las Vegas Harry Reid Intl is 1374.1 mi. 3h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Las Vegas Harry Reid Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Las Vegas Harry Reid Intl Airport were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Las Vegas Harry Reid Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Las Vegas Harry Reid Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Las Vegas Harry Reid Intl Airport.

  • What documentation or ID do you need to fly to Las Vegas Harry Reid Intl Airport?

    The necessary travel and health documents for your Las Vegas Harry Reid Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from St. Louis to Las Vegas?

  • What is the most popular airline from St. Louis to Las Vegas?

Best airlines flying from St. Louis to Las Vegas

Compare and see reviews for airlines that fly from St. Louis to Las Vegas with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $100Free CancellationRating
6.3
8,362 reviews
Search Spirit Airlines flights
FrontierPriceFrom $109Free CancellationRating
5.7
3,055 reviews
Search Frontier flights
DeltaPriceFrom $127Free CancellationRating
7.9
8,086 reviews
Search Delta flights
United AirlinesPriceFrom $209Free CancellationRating
7.4
9,190 reviews
Search United Airlines flights
American AirlinesPriceFrom $226Free CancellationRating
7.2
11,172 reviews
Search American Airlines flights
SouthwestPriceFrom $270Free CancellationRating
8.0
4,266 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to Las Vegas

    Southwest operates around 47 flights from St. Louis to Las Vegas every week. The average price of these flights found in the last 72 hours has been $476, but momondo users have found Southwest deals from St. Louis to Las Vegas from as low as $270 round-trip. Southwest has been scored 8.0/10 in 4,266 reviews.

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Laughlin
Mount Charleston
Henderson
Paradise
Mesquite
North Las Vegas
Kingman
Pahrump
Furnace Creek
Primm
Boulder City
Sunrise Manor
Winchester
Needles

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Las Vegas?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Las Vegas. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Las Vegas with flexible booking policies on momondo?

All flight searches from St. Louis to Las Vegas on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Las Vegas?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Las Vegas.

I’m not ready to book a flight from St. Louis to Las Vegas right now. Can momondo alert me if prices change?

Price alerts on flights to Las Vegas from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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