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$78+ Cheap flights from Las Vegas to St. Louis (LAS - STL)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — STL
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
1 adult, Economy
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Find cheap flights from Las Vegas to St. Louis with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Lambert-St Louis are usually found in October or December, booked 87 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Las Vegas to St. Louis

Cheapest flights from Las Vegas to St. Louis
Explore the most affordable flight options available from Las Vegas to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 5, 2026.

This Super.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:40 pm
LAS
-
STL
Nonstop3h 25m
Frontier
Mon 8/172:52 pm
STL
-
LAS
Nonstop3h 36m
Frontier
Deal found 5/4$156
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:59 am
LAS
-
STL
1 stop16h 24m
Frontier
Tue 6/167:03 pm
STL
-
LAS
1 stop7h 01m
Frontier
Deal found 5/2$175
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:10 am
LAS
-
STL
2 stops24h 45m
Multiple Airlines
Thu 6/116:31 pm
STL
-
LAS
1 stop28h 08m
Multiple Airlines
Deal found 5/5$201
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/812:59 am
LAS
-
STL
1 stop16h 24m
Frontier
Sun 6/142:56 pm
STL
-
LAS
Nonstop3h 35m
Frontier
Deal found 5/2$203
This Cheapflightsfares deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:00 am
LAS
-
STL
1 stop14h 21m
Frontier
Sun 5/244:19 pm
STL
-
LAS
1 stop20h 55m
Frontier
Deal found 4/30$204
This Super.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/212:43 pm
LAS
-
STL
Nonstop3h 28m
Frontier
Mon 5/259:06 pm
STL
-
LAS
Nonstop3h 36m
Frontier
Deal found 5/4$206
This Kiwi.com deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/208:59 pm
LAS
-
STL
1 stop20h 24m
Frontier
Tue 5/268:08 pm
STL
-
LAS
2 stops20h 41m
Frontier
Deal found 5/4$208
This Cheapflightsfares deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:59 pm
LAS
-
STL
1 stop20h 24m
Frontier
Tue 6/98:08 pm
STL
-
LAS
1 stop5h 21m
Frontier
Deal found 5/2$209
This Kiwi.com deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/52:43 pm
LAS
-
STL
Nonstop3h 28m
Frontier
Mon 6/85:27 pm
STL
-
LAS
1 stop29h 12m
Frontier
Deal found 5/2$211
This Frontier deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 am
LAS
-
STL
1 stop11h 31m
Frontier
Sat 6/63:25 pm
STL
-
LAS
1 stop10h 29m
Frontier
Deal found 5/2$212

Find flight deals from Las Vegas to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$175
(Kiwi.com)

One-way from

$78
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$250

Good round-trip deal

$248 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Lambert-St Louis flights.
Search Deals
From Las Vegas Harry Reid Intl to Lambert-St Louis
Search Deals
One-way flight from Las Vegas Harry Reid Intl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($13 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 May 2026
Search Deals
Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Las Vegas to St. Louis 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, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
Use the filters below to find and compare flights from Las Vegas to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 5/27

8:00 am-5:42 pm

1 stop7h 42m

Lambert-St Louis

Sat 5/30

5:10 am-9:07 am

1 stop5h 57m

$379
Quickest round-trip

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/22

3:50 pm-9:10 pm

Nonstop3h 20m

Lambert-St Louis

Sat 5/30

10:35 am-3:05 pm

1 stop6h 30m

$446

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/29

12:59 am-10:07 am

1 stop7h 08m

Lambert-St Louis

Sat 5/30

7:23 pm-12:42 am

1 stop7h 19m

$456

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/29

12:59 am-2:23 pm

2 stops11h 24m

Lambert-St Louis

Wed 6/3

5:10 am-2:22 pm

2 stops11h 12m

$467

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 6/11

11:11 am-11:59 pm

2 stops10h 48m

Lambert-St Louis

Sat 6/13

9:42 am-6:41 pm

2 stops10h 59m

$505

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 6/13

11:11 am-11:59 pm

2 stops10h 48m

Lambert-St Louis

Sat 6/20

9:42 am-6:41 pm

2 stops10h 59m

$505

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 5/30

12:59 am-10:07 am

1 stop7h 08m

Lambert-St Louis

Tue 6/2

6:00 am-2:22 pm

2 stops10h 22m

$516
Cheapest one-way

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 6/3

11:59 pm-10:39 am

1 stop8h 40m

$145
Quickest one-way

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 6/29

8:45 am-2:06 pm

Nonstop3h 21m

$189

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 9/12

6:10 am-3:25 pm

2 stops7h 15m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Las Vegas to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Las Vegas to St. Louis in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Super.comPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Las Vegas-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Las Vegas-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Las Vegas-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Las Vegas 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 Las Vegas to St. Louis

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

To ensure you get the cheapest price possible for a flight from Las Vegas to St. Louis, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, October is the cheapest month in which you can book a flight from Las Vegas to St. Louis (average of $164). Flying from Las Vegas to St. Louis in January is currently the most expensive (average of $312). 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 LAS to STL?

Find hourly flight availability from Las Vegas to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 5, 2026.

One of the essential ways to save on airfare from Las Vegas to St. Louis is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 60% on airfare.

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

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to St. Louis trip
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LAS

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated May 5, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Las Vegas to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,459 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,683 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,667 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,965 reviews
Southwest
7.9
Good
4,305 reviews

Overall

7.9

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Booking a flight from Las Vegas Harry Reid Intl (LAS) to Lambert-St Louis (STL) is your only option if you wish to fly from Las Vegas to St. Louis. On a typical day, there are 4 flights from Harry Reid Intl to Lambert-St Louis, all of which are around 3h 10m for a nonstop flight. You can also purchase a plane ticket from 5 airlines when you book a flight from Harry Reid Intl to St. Louis.

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

    Within the past month, 24 users have taken a look at flights from Las Vegas Harry Reid Intl to Lambert-St Louis.

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

    A quick flight from Las Vegas to St. Louis can take about 3h 20m. United Airlines provides one of the quickest options available for as low as $446. Airlines will cover a distance of 1367 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $86. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $116 and $144, respectively. Frontier is priced at 65% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Las Vegas to St. Louis one-way?

    One-way options have recently been found by users for as low as $60 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $102 and Delta from $116 one-way.

  • What are the most reliable airlines from Las Vegas to St. Louis?

    Consider Volaris (93%), Frontier (88%) or Southwest (76%) when booking your flight. These represent the most reliable airlines when flying from Las Vegas to St. Louis.

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

    The cheapest flight price from Las Vegas to St. Louis is $81. On average you can expect to pay $265. The most popular route, (Las Vegas Harry Reid Intl - Lambert-St Louis), can usually be booked for $238.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Las Vegas to St. Louis 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 Las Vegas to St. Louis?

    Currently, October is the cheapest month in which you can book a flight from Las Vegas to St. Louis (average of $164). Flying from Las Vegas to St. Louis in January is currently the most expensive (average of $312). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Las Vegas to St. Louis

Discover the top 5 airlines that operate flights from Las Vegas to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$215FlexibilityNo cancel feeOn-time62%
DeltaCheapest$116Average$342FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$144Average$412FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$166Average$345FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$267Average$413FlexibilityNo cancel feeOn-time63%

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