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

View AU$212 flight on Sat, 11 Oct. 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$774 Return, found 3 days ago
AU$774
Return
found 3 days ago
Select American Airlines flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$774 found 3 days ago
Delta
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$824 Return, found 3 days ago
AU$824
Return
found 3 days ago
Select Delta flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$824 found 3 days ago
Delta
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$838 Return, found 3 days ago
AU$838
Return
found 3 days ago
Select Delta flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$838 found 3 days ago
American Airlines
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$850 Return, found 3 days ago
AU$850
Return
found 3 days ago
Select American Airlines flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$850 found 3 days ago
American Airlines
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$883 Return, found 3 days ago
AU$883
Return
found 3 days ago
Select American Airlines flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$883 found 3 days ago
Delta
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$885 Return, found 3 days ago
AU$885
Return
found 3 days ago
Select Delta flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$885 found 3 days ago
Delta
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$893 Return, found 3 days ago
AU$893
Return
found 3 days ago
Select Delta flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$893 found 3 days ago
Delta
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$896 Return, found 3 days ago
AU$896
Return
found 3 days ago
Select Delta flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$896 found 3 days ago
United
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$900 Return, found 3 days ago
AU$900
Return
found 3 days ago
Select United flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$900 found 3 days ago
Alaska Airlines
Tue, 30 Dec. - Mon, 5 Jan.
STL
St. Louis
LAS
Las Vegas
AU$1,040 Return, found 3 days ago
AU$1,040
Return
found 3 days ago
Select Alaska Airlines flight, departing Tue, 30 Dec. from St. Louis to Las Vegas, returning Mon, 5 Jan., priced at AU$1,040 found 3 days ago

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

August is typically the cheapest month to fly

From AU$107 - AU$344 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Las Vegas route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Harry Reid Intl.
Return price
AU$774
Distance
2188 km
Average flight time
1 hour 28 mins

Your quick guide to flights from St. Louis to Las Vegas

Pick up great flights from St. Louis to Las Vegas

With Expedia, you have your pick of 7 flights a day with 20 airlines covering flights from St. Louis to Las Vegas. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from St. Louis to Las Vegas that take around 3 hours.

Find cheap flights from St. Louis to Las Vegas

From the great flight deals with prices currently ranging from AU$774 to AU$1,040, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from St. Louis to Las Vegas around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Las Vegas is normally in December.

Reasons to book your flight from St. Louis to Las Vegas with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from St. Louis to Las Vegas across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Las Vegas right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from Lambert Field to Harry Reid Airport (formerly McCarran Airport)?
Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip journeys between St. Louis Lambert International Airport and Harry Reid Airport (formerly McCarran Airport) start from AU$774. Book today to secure the best price for your trip. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to Harry Reid Airport (formerly McCarran Airport)?
Most flights can be cancelled online, but each air carrier has a different set of terms and conditions. If you do have to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from St. Louis Lambert International Airport to LAS that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for St. Louis Lambert International Airport to Harry Reid Airport (formerly McCarran Airport) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert Field to Harry Reid Airport (formerly McCarran Airport)?
It's around 2 200 kilometres between Lambert Field and LAS, so you'll be flying for a while. Keep yourself entertained with things like crossword puzzles or a good old-fashioned book.
Which airlines fly direct from Lambert Field to Harry Reid Airport (formerly McCarran Airport)?
There are several airlines that fly from STL to Harry Reid Airport (formerly McCarran Airport). Southwest Airlines (WN) is a popular option, offering 108 flights on this route each month. Offering 39 flights a month on this route, Frontier Airlines (F9) is another good option.
Are St. Louis Lambert International Airport to Harry Reid Airport (formerly McCarran Airport) flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally find a bargain, with some of the cheapest airfares from STL to LAS emerging a few weeks before the departure date. If you'd rather plan ahead of time, Expedia compares and updates all the best flight deals continuously — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines publish prices so far in advance.

Explore a world of travel with Expedia

*Available to Expedia members.