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Cheap flights from St. Louis to Las Vegas from £28

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAS
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from St. Louis to Las Vegas

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Las Vegas (LAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 September 2025.

Round-trip from

£134

One-way from

£28

Popular in

June

Cheapest in

February

Average price

£195

Good one-way deal

£73 or less
Frontier
  • Frontier
  • 26/10-2/11
  • 2 total stops
  • 19h 53m total
  • St. Louis to Las Vegas
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Frontier
  • Frontier
  • 18/12
  • Nonstop
  • 3h 49m total
  • St. Louis to Las Vegas
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Highest demand for flights based on searches. 9% potential increase in price (£16 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Lambert-St Louis to Las Vegas Harry Reid Intl.
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Find flight deals from St. Louis to Las Vegas

Cheapest flights from St. Louis to Las Vegas
Explore the most affordable flight options available from St. Louis to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Sun 26/1010:17STL - LAS
1 stop7h 40mFrontier
Sun 2/1121:11LAS - STL
1 stop12h 13mFrontier
Deal found 11/9£134
Tue 2/1217:27STL - LAS
1 stop6h 31mUnited Airlines
Wed 3/1207:40LAS - STL
1 stop6h 47mUnited Airlines
Deal found 10/9£180
Tue 2/1206:30STL - LAS
1 stop7h 46mDelta
Wed 10/1206:00LAS - STL
1 stop5h 30mDelta
Deal found 10/9£184
Tue 2/1205:00STL - LAS
Nonstop3h 45mSouthwest
Wed 3/1211:05LAS - STL
1 stop4h 20mSouthwest
Deal found 10/9£202
Sun 26/1011:32STL - LAS
2 stops13h 39mMultiple Airlines
Sat 1/1100:59LAS - STL
1 stop7h 08mMultiple Airlines
Deal found 11/9£205
Wed 8/1005:40STL - LAS
Nonstop3h 35mSouthwest
Wed 15/1005:50LAS - STL
Nonstop3h 10mSouthwest
Deal found 10/9£205
Tue 2/1212:49STL - LAS
1 stop9h 02mDelta
Sat 6/1209:30LAS - STL
2 stops11h 58mDelta
Deal found 9/9£217
Wed 29/1007:00STL - LAS
1 stop9h 47mAlaska Airlines
Thu 30/1006:00LAS - STL
2 stops15h 59mAlaska Airlines
Deal found 9/9£220
Sat 11/1018:05STL - LAS
Nonstop3h 35mSouthwest
Tue 14/1005:50LAS - STL
Nonstop3h 10mSouthwest
Deal found 11/9£221

Cheapflights Fare Finder

 
Customise your flight search to find flights from St. Louis to Las Vegas that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 September 2025.
Use the filters below to find and compare flights from St. Louis to Las Vegas that are best for you.

Fly from

St. Louis

Fly to

Las Vegas

Route

Depart

Return

Price

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 3/3

14:15-18:07

1 stop5h 52m

Las Vegas Harry Reid Intl

Wed 4/3

10:05-17:59

1 stop5h 54m

£184

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 3/12

06:15-12:16

1 stop8h 01m

Las Vegas Harry Reid Intl

Sat 6/12

09:30-23:28

2 stops11h 58m

£217

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 29/10

07:00-14:47

1 stop9h 47m

Las Vegas Harry Reid Intl

Thu 30/10

06:00-23:59

2 stops15h 59m

£220

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 15/10

05:40-07:15

Nonstop3h 35m

Las Vegas Harry Reid Intl

Sat 18/10

06:40-11:50

Nonstop3h 10m

£221

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 8/2

14:55-22:20

1 stop9h 25m

Las Vegas Harry Reid Intl

Wed 11/2

09:30-13:52

1 stop26h 22m

£231

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Fri 16/1

20:50-22:35

Nonstop3h 45m

Las Vegas Harry Reid Intl

Tue 20/1

10:50-17:10

1 stop4h 20m

£236

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 25/10

17:28-22:02

1 stop6h 34m

Las Vegas Harry Reid Intl

Fri 31/10

00:59-10:39

1 stop7h 40m

£243

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sat 14/2

16:30-00:01

2 stops9h 31m

Las Vegas Harry Reid Intl

Mon 16/2

00:59-09:42

1 stop6h 43m

£247

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Wed 22/10

05:00-10:54

2 stops7h 54m

Las Vegas Harry Reid Intl

Sat 25/10

06:00-16:32

2 stops8h 32m

£250

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 6/11

22:20-23:55

Nonstop3h 35m

Las Vegas Harry Reid Intl

Tue 11/11

06:55-12:00

Nonstop3h 05m

£250

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 20 results
1
2

Best time to book a flight from St. Louis to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from St. Louis with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Las Vegas

How far ahead should I book a flight from St. Louis to Las Vegas?

Use this chart to determine the optimal time to book a return flight from St. Louis to Las Vegas. Price data was last updated on 29 August 2025.

The price you pay for your flight from St. Louis to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Las Vegas?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Las Vegas (average of £689). Flying from St. Louis to Las Vegas in July is currently the most expensive (average of £1,020). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to LAS?

Find hourly flight availability from St. Louis to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Las Vegas as you normally would.

How much does it cost for a return flight from St. Louis to Las Vegas?

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this St. Louis to Las Vegas flight route?

    This flight path from Lambert-St Louis to Las Vegas Harry Reid Intl was viewed by 3 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from St. Louis to Las Vegas?

    Airlines like Delta, Alaska Airlines, and Southwest fly from St. Louis to Las Vegas in about 3h 35m. The time it takes to get you to your destination can typically vary by up to 6h 12m. Airlines will cover a distance of 1367 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to Las Vegas one-way?

    The cheapet airlines for a one-way flight from St. Louis to Las Vegas are Frontier (£86), Delta (£92), and Southwest (£101).

  • What are the cheapest flights from St. Louis to Las Vegas?

    Looking at all options, your cheapest flight can be booked for £73. While the most popular route (Lambert-St Louis - Las Vegas Harry Reid Intl) can be booked for £174 on average, our data indicates £97 when flying from St. Louis to Las Vegas.

  • Can I find deals for flights from St. Louis to Las Vegas that include hotel bookings?

    Yes. In addition to deals on St. Louis to Las Vegas flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Las Vegas?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Las Vegas.

  • Can I find deals for business class flights from St. Louis to Las Vegas?

    Yes. Cheapflights offers flight deals from St. Louis to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Las Vegas?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Las Vegas (average of £689). Flying from St. Louis to Las Vegas in July is currently the most expensive (average of £1,020). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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