Cheap flights from Las Vegas to St. Louis from $77

In general, October is the cheapest month to fly from Las Vegas to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $164. The month of December is another great option to travel to St. Louis, with average flight prices from Las Vegas averaging around $203.

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $223. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $435. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

Flying to St. Louis from Las Vegas in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $195 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $431 per ticket.

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

You are more likely to see cheaper flights to St. Louis from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $244 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Las Vegas for as low as $212 on momondo.

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

No. A direct flight is the cheapest option for a flight between Las Vegas to St. Louis.

As of March 2026, prices for Las Vegas to St. Louis flights are approximately 3% more expensive when compared to flights at the same time last year.

United Airlines, Delta, and Southwest are the most popular carriers operating from Las Vegas Harry Reid Intl to Lambert-St Louis

Frontier, Southwest and United Airlines are the top three most popular airlines that fly to St. Louis from Las Vegas according to our data. Frontier is the first choice among our users, with 78% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

Salt Lake City (SLC) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $142.

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 5h 01m.

Salt Lake City (SLC) has the shortest average layover time for this route: 0h 57m.

6 flights are operational daily from Las Vegas to St. Louis as of March 2026. The most popular departure time for this route is 6:00AM, with 62% of flights per day taking off at noon.

47 flights are operational weekly from Las Vegas to St. Louis as of March 2026. The most popular departure day for this route is Sun, with 23% of flights per week taking off on this day.