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Cheap flights from St. Louis to Las Vegas from C$ 217

STL — LAS
26 Nov — 3 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Las Vegas

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Las Vegas

Tue 22/126:09 p.m. -
1 stop6h 09m
Fri 25/122:30 p.m. -
1 stop7h 08m
Deal found 22/10C$ 433
Tue 8/1212:40 p.m. -
1 stop4h 50m
Sat 12/125:00 a.m. -
Nonstop3h 00m
Deal found 22/10C$ 453
Mon 7/125:05 a.m. -
Nonstop3h 45m
Thu 10/127:00 a.m. -
Nonstop3h 00m
Deal found 22/10C$ 454
Sat 5/122:55 p.m. -
Nonstop3h 35m
Tue 8/127:10 a.m. -
1 stop6h 10m
Deal found 23/10C$ 460
Tue 29/123:25 p.m. -
1 stop6h 36m
Wed 30/125:22 p.m. -
1 stop5h 24m
Deal found 22/10C$ 464
Mon 16/115:05 a.m. -
Nonstop3h 45m
Mon 23/117:45 p.m. -
Nonstop3h 10m
Deal found 26/10C$ 475
Sat 21/113:04 p.m. -
1 stop7h 47m
Sat 28/1110:58 a.m. -
Nonstop3h 22m
Deal found 24/10C$ 477
Tue 24/119:55 p.m. -
Nonstop3h 40m
Mon 30/118:35 p.m. -
Nonstop3h 10m
Deal found 22/10C$ 479
Mon 23/115:05 a.m. -
1 stop5h 15m
Fri 27/115:15 p.m. -
Nonstop3h 10m
Deal found 23/10C$ 482
Tue 1/125:30 a.m. -
1 stop5h 35m
Fri 4/127:00 a.m. -
Nonstop3h 00m
Deal found 23/10C$ 488

Find flight deals from St. Louis to Las Vegas

Round-trip from

C$ 433

One-way from

C$ 217

Popular in

October

Cheapest in

January

Average price

C$ 586
United Airlines
  • United Airlines
  • 22/12-25/12
  • 2 total stops
  • 13h 17m total
  • St. Louis to Las Vegas
Search Deals
United Airlines
  • United Airlines
  • 19/12-31/12
  • 1 total stop
  • 6h 09m total
  • St. Louis to Las Vegas
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 91 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Las Vegas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Wed 25/11

9:55 p.m.-11:35 p.m.

Nonstop3h 40m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 227

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Wed 16/12

5:05 a.m.-6:50 a.m.

Nonstop3h 45m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 238
Quickest round-trip

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Thu 17/12

10:10 p.m.-11:45 p.m.

Nonstop3h 35m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 238

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Sat 12/12

2:55 p.m.-4:30 p.m.

Nonstop3h 35m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 238

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Thu 17/12

10:06 a.m.-5:04 p.m.

1 stop8h 58m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 245

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Fri 18/12

6:58 p.m.-11:59 p.m.

1 stop7h 01m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 283

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Fri 18/12

9:55 p.m.-11:35 p.m.

Nonstop3h 40m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 293

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Wed 27/1

7:00 p.m.-8:40 p.m.

Nonstop3h 40m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 293

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Thu 31/12

2:45 p.m.-10:14 p.m.

1 stop9h 29m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 300

St. LouisLas Vegas

STL Lambert-St Louis - LAS Las Vegas Harry Reid Intl

STLLAS

Lambert-St Louis

Thu 18/2

7:33 a.m.-8:20 p.m.

2 stops14h 47m

Las Vegas Harry Reid Intl

Wed 31/12

12:00 a.m.-2:00 a.m.

Nonstop0h 00m

C$ 301

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/10

Showing 1-10 of 22 resultsSorted by cheapest first
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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 round-trip price

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?

To ensure you get the cheapest price possible for a flight from St. Louis to Las Vegas, you should look to book at least 30 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 C$ 353). Flying from St. Louis to Las Vegas in October is currently the most expensive (average of C$ 586). 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?

When flying from St. Louis to Las Vegas, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from St. Louis to Las Vegas?

Airfare is typical for this route at the moment.

St. Louis to Las Vegas flights typically cost between C$ 364 and C$ 660 in December.
The cheapest round-trip price found within the last 5 days was C$ 433 on United Airlines (22 Dec-25 Dec).

Related info for your journey

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

    A quick flight from St. Louis to Las Vegas can take about 6h 35m. Southwest provides one of the quickest options available for as low as C$ 460. There are 2200 km between St. Louis and Las Vegas. This flight may include one or multiple stops.

  • What are the most reliable airlines from St. Louis to Las Vegas?

    The top 3 most reliable airlines when flying from St. Louis to Las Vegas are Volaris (94%), Frontier (84%) and Southwest (78%).

  • 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 vacation 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 C$ 353). Flying from St. Louis to Las Vegas in October is currently the most expensive (average of C$ 586). 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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