$44 Cheap Flights from St. Louis (STL) to Las Vegas (LAS)

View $44 flight on Mon, Jan 19, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $44 for one-way flights and $84 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Jan 19 - Fri, Jan 23
STL
St. Louis
LAS
Las Vegas
$84 Roundtrip, found 8 hours ago
$84
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Las Vegas, returning Fri, Jan 23, priced at $84 found 8 hours ago
Frontier Airlines
Sun, Jan 18 - Mon, Jan 26
STL
St. Louis
LAS
Las Vegas
$94 Roundtrip, found 1 hour ago
$94
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, Jan 18 from St. Louis to Las Vegas, returning Mon, Jan 26, priced at $94 found 1 hour ago
Frontier Airlines
Thu, Jan 29 - Fri, Jan 30
STL
St. Louis
LAS
Las Vegas
$98 Roundtrip, found 21 hours ago
$98
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Thu, Jan 29 from St. Louis to Las Vegas, returning Fri, Jan 30, priced at $98 found 21 hours ago
Frontier Airlines
Thu, Nov 6 - Wed, Feb 11
STL
St. Louis
LAS
Las Vegas
$129 Roundtrip, found 3 days ago
$129
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Nov 6 from St. Louis to Las Vegas, returning Wed, Feb 11, priced at $129 found 3 days ago
Frontier Airlines
Wed, Nov 12 - Thu, Nov 13
STL
St. Louis
LAS
Las Vegas
$130 Roundtrip, found 1 hour ago
$130
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Nov 12 from St. Louis to Las Vegas, returning Thu, Nov 13, priced at $130 found 1 hour ago
Frontier Airlines
Tue, Nov 18 - Wed, Nov 19
STL
St. Louis
LAS
Las Vegas
$135 Roundtrip, found 1 hour ago
$135
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Nov 18 from St. Louis to Las Vegas, returning Wed, Nov 19, priced at $135 found 1 hour ago
Southwest Airlines
Tue, Jan 13 - Thu, Jan 15
STL
St. Louis
LAS
Las Vegas
$140 Roundtrip, found 21 hours ago
$140
Roundtrip
found 21 hours ago
Select Southwest Airlines flight, departing Tue, Jan 13 from St. Louis to Las Vegas, returning Thu, Jan 15, priced at $140 found 21 hours ago
Spirit Airlines
Tue, Jan 6 - Fri, Jan 9
STL
St. Louis
LAS
Las Vegas
$147 Roundtrip, found 19 hours ago
$147
Roundtrip
found 19 hours ago
Select Spirit Airlines flight, departing Tue, Jan 6 from St. Louis to Las Vegas, returning Fri, Jan 9, priced at $147 found 19 hours ago
Alaska Airlines
Mon, Jan 26 - Thu, Jan 29
STL
St. Louis
LAS
Las Vegas
$157 Roundtrip, found 3 hours ago
$157
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Mon, Jan 26 from St. Louis to Las Vegas, returning Thu, Jan 29, priced at $157 found 3 hours ago
Hawaiian Airlines
Sun, Feb 8 - Sat, Feb 14
STL
St. Louis
LAS
Las Vegas
$216 Roundtrip, found 1 day ago
$216
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sun, Feb 8 from St. Louis to Las Vegas, returning Sat, Feb 14, priced at $216 found 1 day ago

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

October is typically the cheapest month to fly

From US$88 - US$369 per traveler.
Flights from St. Louis (STL) to Las Vegas (LAS)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Harry Reid Intl.
Distance
1368 mi
Average flight time
1 hour 32 mins

St. Louis to Las Vegas Flights

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

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 St. Louis to Las Vegas are during the month of January. You can find some of the cheapest flights from St. Louis to Las Vegas with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Las Vegas: 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 St. Louis to Las Vegas

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 St. Louis to Las Vegas in 2025. You can also book with separate airlines for your outbound and return journeys, from $44 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 St. Louis to Las Vegas 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 St. Louis to Las Vegas 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 Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) cost?
Lock in a cheap one-way flight from $44 or cheap return flight from $84 from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) 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 Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Flying in January can help you save, as it's the cheapest month for flights between STL and LAS. You'll typically find the lowest prices during off-peak months.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Board a nonstop flight with Southwest Airlines and fly straight from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS).
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Frontier Airlines and Southwest Airlines are some popular airlines offering reasonable fares. Don't forget that flight prices from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) can change based on demand, travel dates and how early you book. With Expedia's filter tool, you can easily find a STL to LAS flight that fits your preferences and budget.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Daily, an average of 5 direct flights operate from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS). Choose the departure date that best fits your schedule.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
More travelers fly between STL and LAS at 5 PM than at any other time of day. Rather skip the crowds? Travel outside of rush hours and there's a chance you'll save on your fare as well.
What day of the week has the most flights from STL to LAS?
Travel on a Friday if you're searching for the biggest selection of flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Lambert-St. Louis Intl. Airport (STL)'s earliest flight to Harry Reid Intl. Airport (LAS) leaves at approximately 6:20AM UTC-6. With a flight time of 3h 50m, you'll land at around 8:10AM UTC-8.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
The average flight time from STL to LAS is 3 hours and 49 minutes, covering a distance of 1,350 mi.
What airline has the least delays from STL to LAS?
With 90% of flights generally landing on schedule, Southwest Airlines has the best on-time performance for nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS). To monitor your flight status and receive notifications if anything changes, simply head to the Expedia App.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Later departures are on average 22% more likely to be canceled.**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 Las Vegas from Lambert-St. Louis Intl. Airport (STL)?
Compare your flight options from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS). This is the only Las Vegas airport you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) last-minute?
Booking your ticket from STL to LAS just before your getaway is generally more expensive. But if there's some wiggle room with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to LAS flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to LAS flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place will take the stress out of travel planning. Simply secure your flights and choose from our wide range of hotels, then personalize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS)?
If you reserved your STL to LAS flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

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*Available to One Key members.