Cheap flights from St Louis to Las Vegas from $177 STL → LAS
Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS)
The cheapest one-way found recently is $177 with Frontier Airlines, 21 Nov, found 3 days ago.
- Cheapest one-way found recently
- $177, found 3 days ago
- Cheapest month to fly
- February 2027, one-way fares from $113 found in the last 7 days
- Airlines with nonstop flights
- Frontier Airlines
- Shortest nonstop flight found
- 3 h 44 min
One-way
The cheapest one-way fare on each of 3 departure dates is usually $145 to $206.
Cheapest one-way found recently
$177
21 Nov · Frontier Airlines
Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS)
Leaves 6:05 p.m. · 16 h 14 min trip
1 stop
found 3 days ago
Cheapest nonstop one-way
$235
19 Nov · Frontier Airlines
Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS)
Leaves 1:28 p.m. · 3 h 44 min trip
nonstop
found 6 days ago
Found recently, and the cheapest we hold
$177 21 Novfound 3 days agoOpen this trip
$113 17 Feb 2027found 6 days agoOpen this trip
What have prices looked like?
Over 34 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $79 to $113.
At $177, the cheapest one-way found recently is above that range.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 19 Nov to 17 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
No. We hold one-way fares on 1 other departure date within 3 days of 21 Nov, and it is not cheaper.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 19 Nov | $235 | Frontier Airlines | Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS) | nonstop | found 6 days ago | Open this trip |
| 21 Nov | $177 | Frontier Airlines | Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS) | 1 stop | found 3 days ago | Open this trip |
| 17 Feb 2027 | $113 | Frontier Airlines | Lambert-St. Louis International Airport (STL) → McCarran International Airport (LAS) | 2 stops | found 6 days ago | Open this trip |
Which month looks cheapest?
February 2027 is the cheapest month — from $113.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from St Louis to Las Vegas
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 21 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for St Louis to Las Vegas?
One-way
Fares 30 to 59 days before departure were typically 45% lower than 0 to 6 days before departure.
From the cheapest one-way each day between 24 Sept and 12 Nov (34 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $149 | $95 | +82% | 7 |
| 7–13 days | $96 | $95 | +17% | 16 |
| 14–29 days | $109 | $79 | +33% | 19 |
| 30–59 days | $82 | $82 | Cheapest seen | 8 |
| 90–179 days | $113 | $108 | +38% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Belleville → Las Vegas
30 km from St Louis
$381
$204 more than flying from St Louis
21 Nov · BLV → LAS · 2 stops
found 2 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 21 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from St Louis to Las Vegas?
The cheapest one-way found recently is $177 with Frontier Airlines, 21 Nov, found 3 days ago. The cheapest one-way we hold, of any age, is $113 with Frontier Airlines, 17 Feb 2027, found 6 days ago. The cheapest one-way fare on each of 3 departure dates is usually $145 to $206.
What is the cheapest month to fly from St Louis to Las Vegas?
February 2027 is the cheapest month for a one-way, from $113, 17 Feb 2027, found 6 days ago.
How far ahead should I book a flight from St Louis to Las Vegas?
In 34 days of prices between 24 Sept and 12 Nov, one-way fares 30 to 59 days before departure were typically 45% lower than 0 to 6 days before departure.
Is there a direct flight from St Louis to Las Vegas?
Yes, the cheapest nonstop one-way found recently is $235 with Frontier Airlines, 19 Nov, found 6 days ago.
How long is the flight from St Louis to Las Vegas?
The cheapest nonstop one-way found recently, with Frontier Airlines on 19 Nov, takes 3 h 44 min from Lambert-St. Louis International Airport (STL) to McCarran International Airport (LAS). The cheapest one-way found recently, with Frontier Airlines on 21 Nov, takes 16 h 14 min with 1 stop.
Which airlines have the cheapest flights from St Louis to Las Vegas?
Between 19 Nov and 17 Feb 2027, Frontier Airlines has the cheapest one-way on all 3 departure dates we hold.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work