$81 Cheap Flights from Las Vegas (LAS) to St. Louis (STL)

View $81 flight on Wed, Sep 10, 2025Opens in a new window

Popular airlines from Harry Reid Intl. Airport (LAS) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Las Vegas to St. Louis (LAS-STL)

Prices were available within the past 7 days and start at $81 for one-way flights and $132 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Sep 8 - Fri, Sep 12
LAS
Las Vegas
STL
St. Louis
$132 Roundtrip, just found
$132
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Sep 8 from Las Vegas to St. Louis, returning Fri, Sep 12, priced at $132 just found
Frontier Airlines
Fri, Sep 5 - Sat, Sep 13
LAS
Las Vegas
STL
St. Louis
$134 Roundtrip, found 10 hours ago
$134
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Fri, Sep 5 from Las Vegas to St. Louis, returning Sat, Sep 13, priced at $134 found 10 hours ago
Frontier Airlines
Sat, Oct 11 - Mon, Oct 13
LAS
Las Vegas
STL
St. Louis
$138 Roundtrip, found 5 days ago
$138
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sat, Oct 11 from Las Vegas to St. Louis, returning Mon, Oct 13, priced at $138 found 5 days ago
Frontier Airlines
Sat, Sep 6 - Mon, Sep 8
LAS
Las Vegas
STL
St. Louis
$140 Roundtrip, found 5 hours ago
$140
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, Sep 6 from Las Vegas to St. Louis, returning Mon, Sep 8, priced at $140 found 5 hours ago
Frontier Airlines
Sat, Sep 6 - Mon, Sep 8
LAS
Las Vegas
STL
St. Louis
$143 Roundtrip, found 5 hours ago
$143
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, Sep 6 from Las Vegas to St. Louis, returning Mon, Sep 8, priced at $143 found 5 hours ago
Frontier Airlines
Thu, Sep 4 - Sat, Sep 6
LAS
Las Vegas
STL
St. Louis
$146 Roundtrip, found 7 hours ago
$146
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Sep 4 from Las Vegas to St. Louis, returning Sat, Sep 6, priced at $146 found 7 hours ago
Alaska Airlines
Tue, Sep 23 - Sat, Sep 27
LAS
Las Vegas
STL
St. Louis
$216 Roundtrip, found 5 days ago
$216
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Sep 23 from Las Vegas to St. Louis, returning Sat, Sep 27, priced at $216 found 5 days ago
Spirit Airlines
Sat, Aug 30 - Sun, Aug 31
LAS
Las Vegas
STL
St. Louis
$222 Roundtrip, found 8 hours ago
$222
Roundtrip
found 8 hours ago
Select Spirit Airlines flight, departing Sat, Aug 30 from Las Vegas to St. Louis, returning Sun, Aug 31, priced at $222 found 8 hours ago
Sun Country Airlines
Thu, Oct 2 - Sun, Oct 5
LAS
Las Vegas
STL
St. Louis
$313 Roundtrip, found 12 hours ago
$313
Roundtrip
found 12 hours ago
Select Sun Country Airlines flight, departing Thu, Oct 2 from Las Vegas to St. Louis, returning Sun, Oct 5, priced at $313 found 12 hours ago
Southwest Airlines
Tue, Sep 16 - Wed, Sep 17
LAS
Las Vegas
STL
St. Louis
$337 Roundtrip, found 1 day ago
$337
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Sep 16 from Las Vegas to St. Louis, returning Wed, Sep 17, priced at $337 found 1 day ago

Find the cheapest month to fly from Las Vegas (LAS) to St. Louis (STL)

November is typically the cheapest month to fly

From $78 - $457 per traveler.

Graph displaying average flight prices per month

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $462
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $462
Flights from Las Vegas (LAS) to St. Louis (STL)
Origin airport
Harry Reid Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$126
Distance
1368 mi
Average flight time
5 hours 15 mins

Las Vegas to St. Louis Flights

The cheapest times to fly from Las Vegas to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Las Vegas to St. Louis are during the month of September. You can find some of the cheapest flights from Las Vegas to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Las Vegas to St. Louis

Sunday is one of the best days to book for cheap flights from Las Vegas to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Las Vegas to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Las Vegas to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $81 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Las Vegas to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Las Vegas to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $81 or cheap return flight from $132 from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from LAS to STL is September, when there's less demand. Off-peak season is generally when you'll find lower airfares between these airports.
Which airlines fly direct from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
When departing from Harry Reid Intl. Airport (LAS), you can get on a direct flight to Lambert-St. Louis Intl. Airport (STL) with Southwest Airlines.
What is the cheapest airline that flies from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
Frontier Airlines and Southwest Airlines are some popular airlines offering reasonable fares. Remember that flight prices from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) can vary depending on the time of year, demand and how early you book. With Expedia's filter tool, you can easily find a LAS to STL flight that suits your plans and budget.
How many flights per day from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
With, on average, 5 nonstop flights departing from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) daily, you'll be off on your next adventure in no time.
What are the most popular departure times for flights from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
More travelers fly between LAS and STL at 6 PM than at any other point in the day. Looking for a quieter experience? Consider flying outside peak hours and it's possible you'll save on your fare as well.
What day of the week has the most flights from LAS to STL?
If you fly on a Sunday, you'll get the largest range of choices for flights from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL).
What is the earliest flight from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
The first flight of the day departing from Harry Reid Intl. Airport (LAS) is at around 5:30AM UTC-8. Board this flight and you'll reach Lambert-St. Louis Intl. Airport (STL) at approximately 10:30AM UTC-6. The entire trip takes 3h.
How long does it take to fly from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
The average flight time from LAS to STL is 3 hours and 8 minutes, covering a total distance of 1,350 mi.
What airline has the least delays from LAS to STL?
With 80% of journeys generally arriving on schedule, Spirit Airlines has the best on-time performance for direct flights from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL). To keep track of your flight status and get notifications about any changes, simply head to the Expedia App.
What is the best time to fly from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) on schedule, pick a flight that leaves from Harry Reid Intl. Airport (LAS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from Harry Reid Intl. Airport (LAS)?
If you're taking a direct flight from Harry Reid Intl. Airport (LAS) to St. Louis, Lambert-St. Louis Intl. Airport (STL) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from LAS to STL right before your journey is typically more expensive. However, if you're flexible with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book a LAS to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a LAS to STL flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your LAS to STL flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.