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

Within the past month, 21 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 $115. Another option worth looking into is Spirit Airlines, starting at $164 round trip. Frontier is priced at 55% 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 $104 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $111 and Sun Country Air from $120 one-way.

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.

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).

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

The cheapest flight price from Las Vegas to St. Louis is $120. On average you can expect to pay $203. The most popular route, (Las Vegas Harry Reid Intl - Lambert-St Louis), can usually be booked for $166.

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

Before booking your flight from Las Vegas to St. Louis check out the most popular airlines for this route: American Airlines, Delta or Frontier.

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

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 85% on the overall cost on flights from Las Vegas to St. Louis.

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

To save up to 225% on this flight, we recommend booking at least 25 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Las Vegas to St. Louis from $161 1-2 weeks out and tickets from $307 for flights departing within the next 72 hours.

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

February can be a great time to fly to St. Louis from Las Vegas with a flight ticket averaging about $260. Cheapflights users have found deals in the month of February for as cheap as $94. The most expensive prices can be found in the month of December.

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 7 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.

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.

$104+ Flights from Las Vegas to St. Louis

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2. Select your favorite providers

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Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Lambert-St Louis are usually found in February or August, booked 72 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Las Vegas to St. Louis

Round-trip from	$115 (Cheapflightsfares)
One-way from	$104 (Cheapflightsfares)
Popular in	December
Cheapest in	February
Average price	$265
Good round-trip deal	$194 or less
Good one-way deal	$163 or less

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. 8% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in July 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 July 29, 2025.

Mon 9/83:19 pmLAS - STL

Nonstop3h 25mFrontier

Mon 9/159:29 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 7/27

$115

Thu 8/2810:43 pmLAS - STL

1 stop12h 49mSpirit Airlines

Thu 9/412:05 pmSTL - LAS

1 stop11h 04mSpirit Airlines

Deal found 7/29

$164

Thu 8/1410:43 pmLAS - STL

1 stop12h 49mMultiple Airlines

Mon 8/182:37 pmSTL - LAS

Nonstop3h 36mMultiple Airlines

Deal found 7/29

$191

Best flights from Las Vegas to St. Louis
Discover carefully curated flight deals from Las Vegas to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Mon 9/83:19 pmLAS - STL

Nonstop3h 25mFrontier

Mon 9/159:29 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 7/27

$115

Thu 8/2810:43 pmLAS - STL

1 stop12h 49mSpirit Airlines

Thu 9/412:05 pmSTL - LAS

1 stop11h 04mSpirit Airlines

Deal found 7/29

$164

Thu 8/1410:43 pmLAS - STL

1 stop12h 49mMultiple Airlines

Mon 8/182:37 pmSTL - LAS

Nonstop3h 36mMultiple Airlines

Deal found 7/29

$191

Last-minute flights from Las Vegas to St. Louis
Discover last-minute flight deals from Las Vegas to St. Louis. Data last updated July 29, 2025 and is based on user searches.

Tue 8/512:52 amLAS - STL

1 stop7h 37mMultiple Airlines

Sun 8/102:27 pmSTL - LAS

Nonstop3h 36mMultiple Airlines

Deal found 7/27

$244

Tue 8/512:52 amLAS - STL

1 stop7h 37mSpirit Airlines

Sun 8/1010:47 amSTL - LAS

1 stop14h 39mSpirit Airlines

Deal found 7/27

$308

Fri 8/88:20 amLAS - STL

Nonstop3h 22mFrontier

Mon 8/112:37 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 7/28

$214

Thu 8/148:20 amLAS - STL

Nonstop3h 22mFrontier

Mon 8/182:37 pmSTL - LAS

Nonstop3h 36mFrontier

Deal found 7/29

$184

Thu 8/1410:43 pmLAS - STL

1 stop12h 49mMultiple Airlines

Mon 8/182:37 pmSTL - LAS

Nonstop3h 36mMultiple Airlines

Deal found 7/29

$191

Thu 8/146:36 pmLAS - STL

1 stop14h 54mSun Country Air

Sun 8/178:00 amSTL - LAS

1 stop27h 54mSun Country Air

Deal found 7/28

$265

Tue 8/1912:35 amLAS - STL

1 stop6h 01mDelta

Wed 8/277:35 amSTL - LAS

1 stop6h 36mDelta

Deal found 7/27

$287

Fri 8/224:30 pmLAS - STL

1 stop5h 46mAmerican Airlines

Sun 8/245:15 amSTL - LAS

1 stop8h 37mAmerican Airlines

Deal found 7/28

$297

Thu 8/2810:43 pmLAS - STL

1 stop12h 49mSpirit Airlines

Thu 9/412:05 pmSTL - LAS

1 stop11h 04mSpirit Airlines

Deal found 7/29

$164

One-way flights from Las Vegas to St. Louis
Search for one-way flight options from Las Vegas to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Fri 9/263:15 pmLAS - STL

Nonstop3h 25mFrontier

Deal found 7/28

$104

Sun 8/1012:20 amLAS - STL

1 stop7h 32mSpirit Airlines

Deal found 7/29

$111

Thu 9/114:44 pmLAS - STL

1 stop16h 37mSun Country Air

Deal found 7/27

$120

Wed 9/104:15 pmLAS - STL

Nonstop3h 15mSouthwest

Deal found 7/28

$139

Tue 8/267:50 amLAS - STL

1 stop7h 44mHawaiian Airlines

Deal found 7/28

$143

Tue 9/912:35 amLAS - STL

1 stop8h 02mDelta

Deal found 7/28

$144

Fri 8/2911:59 pmLAS - STL

1 stop7h 01mAmerican Airlines

Deal found 7/29

$149

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 9/8

3:19 pm-8:44 pm

Nonstop3h 25m

Lambert-St Louis

Mon 9/15

9:29 pm-11:05 pm

Nonstop3h 36m

$115

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 8/28

10:43 pm-1:32 pm

1 stop12h 49m

Lambert-St Louis

Thu 9/4

12:05 pm-9:09 pm

1 stop11h 04m

$164

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 8/14

10:43 pm-1:32 pm

1 stop12h 49m

Lambert-St Louis

Mon 8/18

2:37 pm-4:13 pm

Nonstop3h 36m

$191

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 9/26

3:15 pm-8:40 pm

Nonstop3h 25m

$104

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sun 8/10

12:20 am-9:52 am

1 stop7h 32m

$111

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 9/11

4:44 pm-11:21 am

1 stop16h 37m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 9/10

4:15 pm-9:30 pm

Nonstop3h 15m

$139

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 8/26

7:50 am-5:34 pm

1 stop7h 44m

$143

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 9/9

12:35 am-10:37 am

1 stop8h 02m

$144

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 8/29

11:59 pm-9:00 am

1 stop7h 01m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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

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, simplifying security with video instructions for a quicker departure process.

STL

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

Our travel experts

Marisa Garcia

Expert on Frontier and Southwest

Taryn White

Expert on STL

Ramsey Qubein

Expert on LAS

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 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?

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.

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

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. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and Hawaiian 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

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Delta

8.0

Very good

7,979 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Hawaiian Airlines

7.8

Good

2,605 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Sun Country Air

6.9

Okay

333 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

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 7 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, 21 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 $115. Another option worth looking into is Spirit Airlines, starting at $164 round trip. Frontier is priced at 55% 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 $104 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $111 and Sun Country Air from $120 one-way.
What are the cheapest flights from Las Vegas to St. Louis?
The cheapest flight price from Las Vegas to St. Louis is $120. On average you can expect to pay $203. The most popular route, (Las Vegas Harry Reid Intl - Lambert-St Louis), can usually be booked for $166.
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

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Top 6 airlines flying from Las Vegas to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$83	Average$208	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$91	Average$125	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$144	Average$378	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$258	Average$371	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$258	Average$483	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$271	Average$431	FlexibilityNo cancel fee	On-time63%

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$104+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Las Vegas to St. Louis with Cheapflights

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3. Compare prices and book

Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Lambert-St Louis are usually found in February or August, booked 72 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from Las Vegas to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Las Vegas to St. Louis

Cheapest flights from Las Vegas to St. LouisExplore 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 July 29, 2025.

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 July 29, 2025.

Cheapflights Fare Finder

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

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

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

Airlines

Frontier

Southwest

Airports

LAS

STL

Our travel experts

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.

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 July 25, 2025.

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

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 July 29, 2025.

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 July 27, 2025.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Southwest, Delta, and Hawaiian 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.

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?

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

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

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

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

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

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

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

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

Traveling to a place near St. Louis?

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Top 6 airlines flying from Las Vegas to St. Louis

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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 July 29, 2025.