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C$99 Cheap Flights from St Louis to Las Vegas Harry Reid International

Compare St Louis to Las Vegas Harry Reid International flight deals

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Flight deals from St Louis to Las Vegas Harry Reid International

Looking for a cheap last-minute deal or the best return flight from St Louis to Las Vegas Harry Reid International? Find the lowest prices on one-way and return tickets right here.
Las Vegas.C$99 per passenger.Departing Sun., Oct. 19.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Sun., Oct. 19, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$99, select.
Las Vegas.C$100 per passenger.Departing Wed., Nov. 19.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed., Nov. 19, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$100, select.
Las Vegas.C$100 per passenger.Departing Mon., Sep. 29.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Mon., Sep. 29, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$100, select.
Las Vegas.C$110 per passenger.Departing Wed., Dec. 3.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed., Dec. 3, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$110, select.
Las Vegas.C$134 per passenger.Departing Mon., Sep. 29.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Mon., Sep. 29, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$134, select.
Las Vegas.C$151 per passenger.Departing Sun., Oct. 5.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Sun., Oct. 5, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$151, select.
Las Vegas.C$170 per passenger.Departing Sat., Nov. 15.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Sat., Nov. 15, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$170, select.
Las Vegas.C$195 per passenger.Departing Sat., Feb. 7.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from St Louis on Sat., Feb. 7, arriving in Las Vegas Harry Reid International.Price includes taxes and charges.From C$195, select.

Find the cheapest month to fly from St Louis to Las Vegas Harry Reid International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Las Vegas Harry Reid International flights are currently cheapest in October.
Sep.
from C$100
Oct.
from C$99
Nov.
from C$100
Dec.
from C$110
Jan.
from C$195
Feb.
from C$195
Mar.
from C$242
Apr.
Find prices
May
from C$352
Jun.
Find prices
Jul.
from C$310
Aug.
Find prices

Direct flights from St Louis to Las Vegas Harry Reid International

St Louis to Las Vegas Harry Reid International: Alternative routes

Compare routes from St Louis to Las Vegas below. You may find an airport to fly into that's cheaper, faster, or easier than Las Vegas Harry Reid International.

St Louis to Las Vegas: Flight information

The things to know before you go.
Cheapest flight foundC$99
Cheapest month to flyOctober
Average flight time3 hrs, 38 mins
Most popular airlineSouthwest Airlines
Average flights per week44

Finding cheap flights from St Louis to Las Vegas Harry Reid International: Frequently asked questions

The best price we found for a return flight from St Louis to Las Vegas Harry Reid International is C$188. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 38 minutes is the average flight time from St Louis to Las Vegas Harry Reid International.
Southwest Airlines, Frontier Airlines and Sun Country Airlines fly direct from St Louis to Las Vegas Harry Reid International.
As of September 2025, there are 44 flights per week flying from St Louis to Las Vegas Harry Reid International.
The cheapest month to fly from St Louis to Las Vegas Harry Reid International is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Las Vegas Harry Reid International Airport on Monday, October 6, 2025.
Yes – the average flight time is 3 hours and 38 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Las Vegas Harry Reid International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Las Vegas is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Las Vegas Harry Reid International.

Flying from Lambert-St. Louis International Airport (STL) to Harry Reid Airport (formerly McCarran Airport) (LAS): what you need to know

  • A direct flight from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport) takes an average of 3 hours 34 minutes. The timezone in Las Vegas is UTC-7, so it's 2 hours behind St Louis.

  • There are 103 flights from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport) each week. Choose the 05:01 flight if you want to leave as soon as possible. If you're keen to get the most out of your day, the last flight from STL to LAS is 22:50.

  • Longer lines at check-in and security are likely if you're flying during high season, so allow even more breathing space. A good general rule for peak times? Arrive up to four hours early for international flights and at least two hours for domestic departures.

  • If you want a stopover for your flight from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport), simply uncheck 'Direct flights only' and explore your options. Here are the most popular stopovers between STL and LAS:

    • Phoenix Sky Harbor International Airport

    • Salt Lake City International Airport

    • Denver International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Harry Reid Airport (formerly McCarran Airport) (LAS)

  • C$99 is currently the lowest price for a one-way ticket from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport). A return flight starts at C$188. These prices can change based on demand.

  • Get cheap flight tickets from STL to LAS by booking at least 9 months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • Schedule your trip for May. That's the cheapest month for flight tickets from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport). If you're flexible with your travel dates, try out the 'Whole month' tool to find the cheapest price across every month.

  • Finding a cheap ticket from STL to LAS is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when the price has dropped.

  • Tailor your trip using filters. Select your preferred arrival and departure times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Fastest' or 'Best' flights from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport).

Handy information about Lambert-St. Louis International Airport (STL)

  • Located around 26 kilometres from the center of St Louis, Lambert-St. Louis International Airport can be reached in about 21 minutes by car, depending on traffic. The ride by public transport takes roughly 36 minutes.

  • Want a relaxed start to your trip? Stay near STL. Whether you're catching an early flight from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport) or just don't want to be rushed, these hotels are ideal:

Arriving at Harry Reid Airport (formerly McCarran Airport) (LAS)

Getting from Harry Reid Airport (formerly McCarran Airport) (LAS) to central Las Vegas

  • From Harry Reid Airport (formerly McCarran Airport), Las Vegas is approximately 19 kilometres away. It takes around 15 minutes to reach the center driving.

  • It typically takes 1 hour if you're using public transport.

When to fly to Harry Reid Airport (formerly McCarran Airport) (LAS)

  • It's time to choose your dates for your flight from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport). October is the most popular month to visit Las Vegas. If you want a more relaxed vibe, go in May.

  • The warmest month in Las Vegas is July, with the temperature ranging between 23ºC and 42ºC. Lock in your flights from Lambert-St. Louis International Airport to Harry Reid Airport (formerly McCarran Airport) in this month if you enjoy this type of weather.

  • January sees average temperatures of between -1ºC and 13ºC. Search for cheap flight tickets from STL to LAS around that time if you like traveling in cooler conditions.

More about Las Vegas

  • When it comes to looking for somewhere to rest your head, you'll find the most popular stays in Las Vegas right here. Check out these hotels once you've booked your flight from STL to LAS:

  • Every great adventure has to include some sightseeing. Las Vegas Strip, Fountains of Bellagio and Fremont Street Experience are must-do's during your Las Vegas adventure.

Complete your Las Vegas trip with hotels and a car rental

  • We've got more party tricks up our sleeve than just comparing flights. Once you've booked your cheap ticket to Harry Reid Airport (formerly McCarran Airport), explore our great car rental offers that'll give you the flexibility and freedom to see the sights at your own pace. Next, have a look at our exclusive rates for hotels to find your ideal Las Vegas stay.

Plan the rest of your trip from St Louis to Las Vegas

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.