Cheap flights from St. Louis to Las Vegas from R2 853

The month of January is, on average, the cheapest month to fly to Las Vegas from St. Louis, with most prices found around R4 046. The month of February is another great option to travel to Las Vegas, with average flight prices from St. Louis averaging around R4 449.

Fly from Lambert-St Louis to Las Vegas Harry Reid Intl for the best Lambert-St Louis - Las Vegas Harry Reid Intl flight prices

You are more likely to see cheaper flights to Las Vegas from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around R5 169 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from St. Louis for as low as R4 143 on momondo.

There is only 1 cabin class available to choose from on St. Louis to Las Vegas flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 20% of flights between St. Louis and Las Vegas have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Frontier have had the fewest delays on this route over the last 12 months, with about 17% of their flights experiencing any sort of delay.

As of September 2026, there are 5 flights per day flying from St. Louis to Las Vegas. The most common time of day flights depart is 8:00, with 35% of flights taking off in the evening.

As of September 2026, 35 flights take off from St. Louis and land in Las Vegas each week. The most common flight departure day for this route is Mon, with 23% of weekly flights taking off on this day.