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

View AU$217 flight on Wed, 12 Aug 2026Opens in a new window

Flight 1

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

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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.

United
Wed, 15 July - Fri, 17 July
STL
St. Louis
LAS
Las Vegas
AU$1,554 Return, found 2 hours ago
AU$1,554
Return
found 2 hours ago
Select United flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Fri, 17 July, priced at AU$1,554 found 2 hours ago
United
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,567 Return, found 2 hours ago
AU$1,567
Return
found 2 hours ago
Select United flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,567 found 2 hours ago
United
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,569 Return, found 2 hours ago
AU$1,569
Return
found 2 hours ago
Select United flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,569 found 2 hours ago
United
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,575 Return, found 2 hours ago
AU$1,575
Return
found 2 hours ago
Select United flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,575 found 2 hours ago
American Airlines
Wed, 15 July - Fri, 17 July
STL
St. Louis
LAS
Las Vegas
AU$1,600 Return, found 2 hours ago
AU$1,600
Return
found 2 hours ago
Select American Airlines flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Fri, 17 July, priced at AU$1,600 found 2 hours ago
American Airlines
Wed, 15 July - Fri, 17 July
STL
St. Louis
LAS
Las Vegas
AU$1,615 Return, found 2 hours ago
AU$1,615
Return
found 2 hours ago
Select American Airlines flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Fri, 17 July, priced at AU$1,615 found 2 hours ago
Delta
Wed, 15 July - Fri, 17 July
STL
St. Louis
LAS
Las Vegas
AU$1,623 Return, found 2 hours ago
AU$1,623
Return
found 2 hours ago
Select Delta flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Fri, 17 July, priced at AU$1,623 found 2 hours ago
United
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,630 Return, found 2 hours ago
AU$1,630
Return
found 2 hours ago
Select United flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,630 found 2 hours ago
Alaska Airlines
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,637 Return, found 2 hours ago
AU$1,637
Return
found 2 hours ago
Select Alaska Airlines flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,637 found 2 hours ago
Delta
Wed, 15 July - Thu, 16 July
STL
St. Louis
LAS
Las Vegas
AU$1,637 Return, found 2 hours ago
AU$1,637
Return
found 2 hours ago
Select Delta flight, departing Wed, 15 July from St. Louis to Las Vegas, returning Thu, 16 July, priced at AU$1,637 found 2 hours ago

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

February is typically the cheapest month to fly

From AU$84 - AU$336 per traveller.

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) cost?
You can find cheap one-way flights from AU$217 and cheap return flights from AU$1,554 STL to LAS with Expedia. Return flights often range between AU$627 and AU$2,970. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when STL to LAS ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
February is typically the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.), with average return fares around AU$501. February often sees lower prices as it falls outside of peak holiday travel periods, leading to reduced demand and more competitive airline offers. Other cheap months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) include January and August.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
There are 2 airlines offering direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.). Here are the carriers:
  • Southwest Airlines operates 35 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) every week.
  • Frontier Airlines operates 9 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) every week.
How do I find cheap flights from St. Louis, MO (STL) to Las Vegas, NV (LAS)?
To find a cheap flight from St. Louis, MO (STL) to Las Vegas, NV (LAS), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from St. Louis, MO (STL) to Las Vegas, NV (LAS)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
You'll find approximately 6 nonstop flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.). For even more choices, look at flights that include layovers, as there are around 123 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) typically departs around 5:00 AM. This service is operated by American Airlines. This is a seasonal service active in December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
You'll find the most flights from Lambert-St. Louis Intl. (STL) to Harry Reid International Airport (LAS) on Thursdays, with around 114 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, United, and American Airlines. Flight schedules are fairly consistent throughout the week, so you'll have a good selection of flights no matter which day you choose to fly.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, American Airlines and United, offer flights during this window. Many travellers prefer these times because you can get an early start on your travel day and arrive in Las Vegas with plenty of time to enjoy your destination.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
When flying from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.), you'll find that a nonstop flight typically takes around 3 hours 30 minutes. This route covers a distance of approximately 2,202 kilometers. If you opt for a flight with one stop, your travel time will be longer, usually around 7 hours 30 minutes. Flights with two or more stops can take even longer, often around 9 hours 50 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
You can fly business class or first class between STL and LAS. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, Spirit Airlines, United, Delta, and American Airlines.
How do I earn miles on a St. Louis, MO (STL) to Las Vegas, NV (LAS) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL) to Las Vegas, NV (LAS) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Las Vegas, NV (LAS) from St. Louis, MO (STL)?
If you're planning to travel to Las Vegas from Lambert-St. Louis Intl. (STL), you can fly directly into Harry Reid International Airport (LAS). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Denver Intl. (DEN), or Love Field (DAL) before reaching Las Vegas. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL) to Las Vegas, NV (LAS) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL) to Las Vegas, NV (LAS) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL) to Las Vegas, NV (LAS) flight and hotel package?
Securing a St. Louis, MO (STL) to Las Vegas, NV (LAS) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL) to Las Vegas, NV (LAS)?
If you booked your St. Louis, MO (STL) to Las Vegas, NV (LAS) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Harry Reid Intl.
Return price
AU$1,554
Distance
2188 km
Average flight time
1 hour 25 mins

Book with confidence

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 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 hours.

Find cheap flights from St. Louis to Las Vegas

From the great flight deals with prices currently ranging from AU$1,554 to AU$1,637, 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 July.

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.

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

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