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$61+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — STL
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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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 September or February, booked 72 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap 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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$122
(Frontier)

One-way from

$61
(Frontier)

Popular in

December

Cheapest in

September

Average price

$238

Good round-trip deal

$172 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Lambert-St Louis flights.
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From Las Vegas Harry Reid Intl to Lambert-St Louis
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One-way flight from Las Vegas Harry Reid Intl to Lambert-St Louis
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Highest demand for flights based on searches. 22% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Lambert-St Louis.
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Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Lambert-St Louis.
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Find 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 March 25, 2025.

This Frontier deal was found by Cheapflights users on 3/24. 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.
Thu 4/37:40 amLAS - STL
Nonstop3h 16mFrontier
Mon 4/76:38 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 3/24$122
This Priceline deal was found by Cheapflights users on 3/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/99:24 pmLAS - STL
1 stop9h 51mMultiple Airlines
Mon 5/129:55 pmSTL - LAS
Nonstop3h 46mMultiple Airlines
Deal found 3/25$162
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2112:59 amLAS - STL
1 stop6h 55mAmerican Airlines
Tue 5/277:19 pmSTL - LAS
1 stop6h 26mAmerican Airlines
Deal found 3/24$227
This Southwest deal was found by Cheapflights users on 3/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/155:00 amLAS - STL
Nonstop3h 05mSouthwest
Tue 5/205:45 amSTL - LAS
1 stop6h 20mSouthwest
Deal found 3/24$281
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/712:54 amLAS - STL
1 stop7h 53mDelta
Sun 5/117:30 amSTL - LAS
1 stop6h 29mDelta
Deal found 3/25$291
This Sun Country Air deal was found by Cheapflights users on 3/24. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/37:15 pmLAS - STL
1 stop14h 19mSun Country Air
Sun 4/66:35 amSTL - LAS
1 stop18h 21mSun Country Air
Deal found 3/24$320
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/188:59 pmLAS - STL
2 stops15h 16mAlaska Airlines
Tue 4/226:30 amSTL - LAS
1 stop15h 40mAlaska Airlines
Deal found 3/24$365
This United Airlines deal was found by Cheapflights users on 3/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2312:46 amLAS - STL
1 stop7h 59mUnited Airlines
Wed 5/284:32 pmSTL - LAS
2 stops9h 55mUnited Airlines
Deal found 3/23$369

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 March 25, 2025.
Use the filters below to find and compare flights from Las Vegas to St. Louis that are best for you.

Fly from

Las Vegas

Fly to

St. Louis

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 4/4

12:22 pm-5:43 pm

Nonstop3h 21m

Lambert-St Louis

Sun 4/6

1:06 pm-2:51 pm

Nonstop3h 45m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/9

9:24 pm-9:15 am

1 stop9h 51m

Lambert-St Louis

Mon 5/12

9:55 pm-11:41 pm

Nonstop3h 46m

$162

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 5/21

12:59 am-9:54 am

1 stop6h 55m

Lambert-St Louis

Tue 5/27

7:19 pm-11:45 pm

1 stop6h 26m

$227

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 5/15

5:00 am-10:05 am

Nonstop3h 05m

Lambert-St Louis

Tue 5/20

5:45 am-10:05 am

1 stop6h 20m

$281

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 5/7

12:54 am-10:47 am

1 stop7h 53m

Lambert-St Louis

Sun 5/11

7:30 am-11:59 am

1 stop6h 29m

$291

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 4/18

8:59 pm-2:15 pm

2 stops15h 16m

Lambert-St Louis

Tue 4/22

6:30 am-8:10 pm

1 stop15h 40m

$365

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 5/23

12:46 am-10:45 am

1 stop7h 59m

Lambert-St Louis

Wed 5/28

4:32 pm-12:27 am

2 stops9h 55m

$369

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 5/22

8:20 am-1:40 pm

Nonstop3h 20m

$61

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 5/7

9:24 pm-9:15 am

1 stop9h 51m

$94

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 4/21

12:59 am-9:01 am

1 stop6h 02m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 16 results
1
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
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.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to St. Louis trip
Airlines
Frontier

Frontier’s UpFront Plus seats offer a guaranteed empty middle seat for extra comfort.


Frontier’s Zone 1 boarding is available with a carry-on bag or special fare bundle.

Read more about Frontierby Marisa Garcia
Southwest

Southwest offers two free checked bags, including oversized items like skis or golf clubs.


Southwest’s Early Bird check-in gives priority boarding 36 hours before departure.

Read more about Southwestby Marisa Garcia
Airports
LAS

Experience self-service TSA screening at LAS for a streamlined security process, reducing wait times before your flight to STL.

Read more about LASby Ramsey Qubein
STL

Use the MetroLink light rail for a convenient and economical trip from STL to downtown St. Louis, taking about 40 minutes.

Read more about STLby Taryn White
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

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

Ramsey Qubein

Ramsey Qubein

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

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?

Use this chart to determine the optimal time to book a round-trip flight from Las Vegas to St. Louis. Price data was last updated on March 21, 2025.

To ensure you get the cheapest price possible for a flight from Las Vegas to St. Louis, you should look to book at least 72 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, August is the cheapest month in which you can book a flight from Las Vegas to St. Louis (average of $311). Flying from Las Vegas to St. Louis in March is currently the most expensive (average of $356). 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 March 25, 2025.

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 62% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Las Vegas to St. Louis. Price data was last updated on March 16, 2025.

Travelers seeking maximum savings on their Las Vegas to St. Louis flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 March 25, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Las Vegas to St. Louis. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 6 flights from Harry Reid Intl to Lambert-St Louis, all of which are around 3h 05m for a nonstop flight. You can also purchase a plane ticket from 6 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, 28 users have taken a look at flights from Las Vegas Harry Reid Intl to Lambert-St Louis.

  • 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 $122. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $227 and $281, respectively. Frontier is priced at 43% 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 $61 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $94 and American Airlines from $114 one-way.

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

    The cheapest flight price from Las Vegas to St. Louis is $79. On average you can expect to pay $197. The most popular route, (Las Vegas Harry Reid Intl - Lambert-St Louis), can usually be booked for $190.

  • 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, August is the cheapest month in which you can book a flight from Las Vegas to St. Louis (average of $311). Flying from Las Vegas to St. Louis in March is currently the most expensive (average of $356). 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 Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
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Top 6 airlines flying from Las Vegas to St. Louis

Discover the top 6 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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$170FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$100Average$154FlexibilityNo cancel feeOn-time65%
DeltaCheapest$258Average$408FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$276Average$393FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$436FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$313Average$478FlexibilityNo cancel feeOn-time69%
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