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$104 Cheap Flights from Las Vegas (LAS) to St. Louis (STL)

View $104 flight on Fri, Oct 23, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $104 for one-way flights and $178 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Aug 17 - Mon, Aug 31
LAS
Las Vegas
STL
St. Louis
$178 Roundtrip, found 2 days ago
$178
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Aug 17 from Las Vegas to St. Louis, returning Mon, Aug 31, priced at $178 found 2 days ago
Frontier Airlines
Fri, Oct 30 - Fri, Nov 6
LAS
Las Vegas
STL
St. Louis
$208 Roundtrip, found 22 hours ago
$208
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Fri, Oct 30 from Las Vegas to St. Louis, returning Fri, Nov 6, priced at $208 found 22 hours ago
Frontier Airlines
Tue, Sep 1 - Sat, Sep 12
LAS
Las Vegas
STL
St. Louis
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Sep 1 from Las Vegas to St. Louis, returning Sat, Sep 12, priced at $213 found 1 day ago
Frontier Airlines
Fri, Oct 9 - Sun, Oct 11
LAS
Las Vegas
STL
St. Louis
$218 Roundtrip, found 2 hours ago
$218
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Fri, Oct 9 from Las Vegas to St. Louis, returning Sun, Oct 11, priced at $218 found 2 hours ago
Frontier Airlines
Thu, Sep 10 - Mon, Sep 21
LAS
Las Vegas
STL
St. Louis
$223 Roundtrip, found 11 hours ago
$223
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Sep 10 from Las Vegas to St. Louis, returning Mon, Sep 21, priced at $223 found 11 hours ago
Frontier Airlines
Fri, Aug 28 - Mon, Aug 31
LAS
Las Vegas
STL
St. Louis
$228 Roundtrip, found 4 hours ago
$228
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Aug 28 from Las Vegas to St. Louis, returning Mon, Aug 31, priced at $228 found 4 hours ago
Southwest Airlines
Mon, Nov 2 - Tue, Nov 10
LAS
Las Vegas
STL
St. Louis
$355 Roundtrip, found 17 hours ago
$355
Roundtrip
found 17 hours ago
Select Southwest Airlines flight, departing Mon, Nov 2 from Las Vegas to St. Louis, returning Tue, Nov 10, priced at $355 found 17 hours ago
United
Sat, Aug 29 - Mon, Aug 31
LAS
Las Vegas
STL
St. Louis
$369 Roundtrip, found 11 hours ago
$369
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Aug 29 from Las Vegas to St. Louis, returning Mon, Aug 31, priced at $369 found 11 hours ago
Alaska Airlines
Sat, Sep 5 - Sun, Sep 6
LAS
Las Vegas
STL
St. Louis
$417 Roundtrip, found 18 hours ago
$417
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Sat, Sep 5 from Las Vegas to St. Louis, returning Sun, Sep 6, priced at $417 found 18 hours ago
Delta
Fri, Dec 25 - Sat, Jan 2
LAS
Las Vegas
STL
St. Louis
$427 Roundtrip, found 9 hours ago
$427
Roundtrip
found 9 hours ago
Select Delta flight, departing Fri, Dec 25 from Las Vegas to St. Louis, returning Sat, Jan 2, priced at $427 found 9 hours ago

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 $358
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $358

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

February is typically the cheapest month to fly

From $58 - $234 per traveler.

What you need to know for your flight from Harry Reid Intl. to Lambert-St. Louis Intl.

Las Vegas (LAS) to St. Louis (STL) at a glance

Travel between Las Vegas (LAS) and St. Louis (STL) with a selection of airlines catering to this short domestic route. Discover options ranging from budget-friendly fares to full-service flights, helping you find the perfect itinerary that aligns with your travel plans and budget. As you prepare to explore St. Louis's iconic attractions and vibrant neighborhoods, gather all the essential details for your flight from Harry Reid International Airport (LAS) to Lambert-St. Louis International Airport (STL).

  • Fastest flight duration: around 3h 15m non-stop
  • Route distance: roughly 1,400 miles (2,250 km)
  • Flights per week: around 30+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $60–$420, depending on seasonality and how far ahead you book

Flights from Harry Reid International Airport (LAS) to Lambert-St. Louis International Airport (STL)

Based on the latest travel bookings, here are the most popular airlines flying from Las Vegas to St. Louis, particularly favored for non-stop and one-stop flights. Travelers often choose routes with convenient layovers at Denver International Airport (DEN, approximately 2 hours), Sky Harbor International Airport (PHX, around 1 hour and 15 minutes), and Dallas-Fort Worth International Airport (DFW, also about 1 hour and 15 minutes). These options allow you to balance price, total travel time, and cabin class to create the best travel itinerary.

  • Southwest Airlines: This budget-friendly airline provides both non-stop and one-stop options. One-way fares usually vary from $105 to $520, representing about 43% of departures on this route, with a standard non-stop flight duration of 3 hours and 15 minutes.
  • Frontier Airlines: A cost-effective choice, Frontier Airlines also offers non-stop and one-stop services. One-way tickets generally range from $60 to $285, covering roughly 26% of the route's departures, with a typical non-stop flight time of 3 hours and 15 minutes.
  • American Airlines: As a full-service airline, American Airlines features one-stop options with one-way fares typically between $85 and $410. They account for approximately 17% of the departures, with an in-flight duration of 4 hours and 15 minutes, leading to an overall journey time of about 6 hours, including layovers.
  • Delta: Another full-service airline, Delta offers one-stop services priced between $110 and $460 for one-way tickets. They represent around 7% of the departures on this route, with an in-flight time of 4 hours and 15 minutes, culminating in a total travel duration of about 6 hours with layovers.
  • United: Also a full-service carrier, United provides one-stop services with one-way fares ranging from $105 to $625. They account for roughly 7% of the route's departures, featuring a flight time of 4 hours and 15 minutes and a total journey time of approximately 6 hours, including any layover.

Travelers can enhance their journey from Las Vegas to St. Louis by upgrading to first class, with options available through both United and Delta for added comfort and superior service.

Best time to fly from Las Vegas (LAS) to St. Louis (STL)

The most popular months for travelers flying from Las Vegas to St. Louis are January, March, and April, when peak temperatures in St. Louis reach up to 56.1°F in April. If you prefer quieter travel, consider May, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 66.6°F. For better deals, February usually offers the lowest average one-way fare around $161. Flight availability peaks in July, with approximately 36 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: February usually offers good deals with average one-way fare around $161, roughly 19% cheaper than the yearly average.
  • Another budget-friendly time to fly: May typically offers an average one-way fare of around $173.
  • Most flight options: July has the highest number of flights from Las Vegas to St. Louis, with approximately 36 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January31.6°F (-0.2°C)High28$200
February34.9°F (1.6°C)Average26$161
March46.4°F (8.0°C)High30$225
April56.1°F (13.4°C)High33$204
May66.6°F (19.2°C)Low26$173
June76.1°F (24.5°C)Average33$223
July78.6°F (25.9°C)Average36$232
August77.0°F (25.0°C)Low28$191
September70.9°F (21.6°C)Average34$204
October58.6°F (14.8°C)Average34$193
November46.2°F (7.9°C)Low30$203
December37.8°F (3.2°C)Average30$193

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Las Vegas (LAS) to St. Louis (STL)

  • Las Vegas to St. Louis (LAS-SUS): Spirit of St. Louis Airport (SUS) lies approximately 16 miles from Lambert-St. Louis International Airport (STL), offering convenient access to the area.
  • Las Vegas to St. Louis (LAS-CPS): St. Louis Downtown Airport (CPS) is located about 16 miles from Lambert-St. Louis International Airport (STL), providing an alternative entry point to the city.
  • Laughlin to St. Louis (IFP-STL): Laughlin - Bullhead International Airport (IFP) is positioned roughly 71 miles from Harry Reid International Airport (LAS), making it a viable option for travelers heading to St. Louis.

How to find the best prices for flights from Las Vegas (LAS) to St. Louis (STL)

Getting some of the best deals on flights from Las Vegas to St. Louis is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking 2-8 weeks in advance, which coincides with the typical booking window for most travelers. Afternoon departures from 12 PM to 6 PM tend to be less expensive and are also the most popular flight times. Additionally, flying on Friday often offers lower prices, although Sunday remains the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Lambert-St. Louis International Airport from Harry Reid International Airport

St. Louis welcomes travelers from Las Vegas with a range of transport options based on price, convenience, and proximity. Here's how to reach St. Louis efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Louis, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Lambert-St. Louis International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Lambert-St. Louis International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located about 0.1 miles away on foot, offering easy access to public transport.

Frequently asked questions

How much does a flight from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
You can find cheap one-way flights from $104 and cheap return flights from $178 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) with Expedia. One-way flights generally range between $182 and $831, and roundtrip flights usually range from $335 to $1132. 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
February is the cheapest month to fly from Las Vegas, NV (LAS) to St. Louis, MO (STL), with average return fares around $334. This is about 17% lower than the average price throughout the year, as February tends to have lower travel demand. Other budget-friendly months include May and August.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Frontier Airlines operates around 10 direct flights from LAS to STL every week.
What is the cheapest airline that flies from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Frontier Airlines is one of the cheapest airlines offering nonstop flights from Harry Reid Intl. (LAS) to Lambert-St. Louis Intl. (STL), with round-trip tickets starting from around $58. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best airline to fly with from Las Vegas, NV (LAS) to St. Louis, MO (STL) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. WN offers the most daily flights from Las Vegas to St. Louis, 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
For flights from Las Vegas (LAS) to St. Louis (STL), February and August are the best months to travel. You can expect return flights to be around $334 in February, which is the cheapest month. February is ideal for lower prices, while August is popular for summer travel, providing plenty of options. This information is based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are approximately 6 nonstop flights per day from Harry Reid International Airport (LAS) to Lambert-St. Louis Intl. (STL). For more options, look at flights that include layovers.
What is the earliest flight from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Las Vegas, NV (LAS) to St. Louis, MO (STL) usually departs at around 12:05 AM, operated by United. This is a seasonal service active in March, which can help you maximize your time in St. Louis. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Las Vegas (LAS) to St. Louis (STL) are in the early morning, from 6am to 9am. About 30% of passengers prefer this time window. Many major carriers, including American Airlines, Southwest Airlines, and Frontier Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in St. Louis with plenty of time to explore.
How long does it take to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Direct flights from LAS to STL usually take about 3 hours 20 minutes, traveling roughly 1,368 miles. If you opt for a connecting flight, expect to add around 3 hours 40 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
First class is available on flights from LAS to STL. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines
  • Spirit Airlines

How do I earn miles on a Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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 St. Louis from McCarran Intl. (LAS)?
If you're planning to travel to St. Louis from Harry Reid International Airport (LAS), you can fly into Lambert-St. Louis Intl. (STL) Some flights may connect through major hubs like Portland Intl. (PDX), Los Angeles Intl. (LAX), San Diego Intl. (SAN) before reaching St. Louis. 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) St Louis Vacation Packages 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 Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Las Vegas, NV (LAS-Harry Reid Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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
Harry Reid Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$178
Distance
1368 mi
Average flight time
5 hours 21 mins

Book with confidence

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 August. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $104 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.

 

Las Vegas to St. Louis Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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