Cheap Flights from Las Vegas to St Louis

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Flight deals from Las Vegas to St Louis

Looking for a cheap last-minute deal or the best return flight from Las Vegas to St Louis? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Las Vegas to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Las Vegas to St Louis flights are currently cheapest in September.

Direct flights from Las Vegas to St Louis

Las Vegas to St Louis: Alternative routes

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

Las Vegas to St Louis: Flight information

The things to know before you go.
Cheapest flight foundر.ق.‏ 261
Cheapest month to flySeptember
Average flight time3 hrs, 13 mins
Most popular airlineSouthwest Airlines
Average flights per week88

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

The best price we found for a return flight from Las Vegas to St Louis is ر.ق.‏ 515. 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 13 minutes is the average flight time from Las Vegas to St Louis.
Southwest Airlines, Frontier Airlines and Volaris fly direct from Las Vegas to St Louis.
As of September 2025, there are 88 flights per week flying from Las Vegas to St Louis.
The cheapest month to fly from Las Vegas to St Louis is usually October.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Las Vegas to St Louis Airport on Wednesday, 22 October 2025.
Yes – the average flight time is 3 hours and 13 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 St Louis 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 St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to St Louis is Frontier Airlines .

Flying from Las Vegas to Lambert-St. Louis International Airport (STL): What you need to know

  • Las Vegas's main airport is Harry Reid Airport (formerly McCarran Airport) (LAS). Explore your options for departing from this terminal when searching for your flights from Las Vegas to Lambert-St. Louis International Airport (STL).

  • Expect to be travelling for 3 hours 15 minutes. That's the average time for a direct Las Vegas to Lambert-St. Louis International Airport flight.

  • Lambert-St. Louis International Airport is located in St Louis. The city follows the UTC-5 timezone and is two hours ahead of Las Vegas.

  • Harry Reid Airport (formerly McCarran Airport) (LAS) to Lambert-St. Louis International Airport (STL) is the most popular route. There are 22 direct departures a week to choose from. If you prefer a later start to the day, take the last flight with Southwest Airlines at 8:40pm. Opt for the first LAS to STL departure operated by Southwest Airlines at 5am if you'd rather get a move on.

  • To ensure you get on your flight from Las Vegas to STL, leave enough time to check in and find your gate. Turning up two hours before international departures and one hour before domestic flights is the standard rule.

  • If you're flying during a major holiday or other peak period, allow extra time. Get there two hours ahead of domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

Airports in Las Vegas

Harry Reid Airport (formerly McCarran Airport) (LAS)

  • Get there in one go from Harry Reid Airport (formerly McCarran Airport) (LAS). Nonstop flights from Las Vegas to Lambert-St. Louis International Airport (STL) operate from here.

  • When departing from LAS, you can take a direct flight from Las Vegas to Lambert-St. Louis International Airport with Southwest Airlines.

  • Most travellers prefer to book seats with Southwest Airlines between LAS and STL.

  • Southwest Airlines leads the way in punctuality. An impressive 84.18% of its departures on this route arrive as scheduled.

  • LAS is about 19 kilometres from central Las Vegas. If you're ride-sharing, driving or catching a cab from the centre, it'll take 15 minutes or so to get there, depending on the traffic. If you're using public transport, expect the travel time to be around 1 hour.

  • Want an easy start to your travels? Stay near Harry Reid Airport (formerly McCarran Airport). Whether you've booked an early flight from Las Vegas to Lambert-St. Louis International Airport or just don't like being rushed, these hotels are just what you're after:

  • Harry Reid Airport (formerly McCarran Airport) gets top marks for its on-time performance. 82.07% of flights that take off from LAS arrive at their destination without delay.

  • You'll find LAS at 5757 Wayne Newton Boulevard.

About Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • Central St Louis is roughly 16 kilometres from Lambert-St. Louis International Airport. Journey times by cab or car hire will vary depending on time of day, so do some research before you go.

  • It'll take around 35 minutes if you're travelling by public transport.

How to find the cheapest flights from Las Vegas to Lambert-St. Louis International Airport (STL)

  • The lowest price we've found for a one-way ticket from Las Vegas to Lambert-St. Louis International Airport is ر.ق.‏ 261. For a return flight on this route, the best price is ر.ق.‏ 515. Depending on the availability and when you book, these fares could change.

  • Booking in advance is often the key to finding a cheap flight from Las Vegas to STL. Prices tend to rise as demand increases, so the closer your departure date, the more you'll likely spend.

  • Affordable Las Vegas to Lambert-St. Louis International Airport tickets are easier to find if your travel dates are flexible. Use the 'Whole month' tool to compare fares across each month and then choose the cheapest day.

  • Snapping up a cheap flight ticket from Las Vegas to STL is easy with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch when a better deal is available.

  • Tailor your travel plans using filters. Pick your ideal departure and arrival times, total journey duration and airlines. You can also sort your results by 'Best,' 'Cheapest' or 'Fastest' flights from Las Vegas to Lambert-St. Louis International Airport.

The best time to fly from Las Vegas to Lambert-St. Louis International Airport (STL)

  • April is the quietest month for flights from Las Vegas to Lambert-St. Louis International Airport (STL), while July is the busiest. Pick the best time to visit St Louis based on whether you like a laid-back vibe or a more bustling atmosphere.

  • The warmest month in St Louis is July, with temperatures ranging between 17ºC and 33ºC. Book your Las Vegas to STL flight ticket then if that's your ideal forecast.

  • January has temperatures of between -8ºC and 7ºC. Look for cheap tickets from Las Vegas to Lambert-St. Louis International Airport around that time if you want to travel when it's cooler.

More about St Louis

Explore more of the United States

  • Evansville is just one of the many places in the United States waiting to be explored once you've taken in the sights of St Louis. Around 257 kilometres away to the east, top sights here include Mesker Park Zoo, Riverfront Park and Evansville Zoological Society.

  • If you're interested in discovering another great destination in the United States, head for Columbia, about 177 kilometres west of St Louis. Sentinel Park, Museum of Art and Archaeology and Bur Oak Brewing Company are key reasons to visit.

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