Cheap flights from Los Angeles to St. Louis from $139

In general, October is the cheapest month to fly from Los Angeles to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $389. The month of November is another great option to travel to St. Louis, with average flight prices from Los Angeles averaging around $391.

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $419. 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 Sunday because tickets tend to average around $581. 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 Los Angeles in the evening is the least expensive time of day to depart. momondo users have found prices as low as $362 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $573 per ticket.

Fly from Los Angeles Los Angeles to Lambert-St Louis for the best Los Angeles Los Angeles - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from Los Angeles when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $447 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Los Angeles for as low as $398 on momondo.

There are 4 cabin classes available to choose from on Los Angeles to St. Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 2% on your flight if you consider stops on a Los Angeles to St. Louis flight.

As of September 2026, prices for Los Angeles to St. Louis flights are approximately 31% more expensive when compared to flights at the same time last year.

Southwest and Delta are the most popular carriers operating from Los Angeles Los Angeles to Lambert-St Louis

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to St. Louis from Los Angeles according to our data. Southwest is the first choice among our users, with 59% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 7 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 86% of momondo users choosing 1-stop flights on this route connected there.

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $260.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 8h 15m.

Denver (DEN) has the shortest average layover time for this route: 2h 42m.

As of September 2026, there are 9 flights per day flying from Los Angeles to St. Louis. The most common time of day flights depart is 5:00PM, with 86% of flights taking off in the afternoon.

As of September 2026, 63 flights take off from Los Angeles and land in St. Louis each week. The most common flight departure day for this route is Thu, with 16% of weekly flights taking off on this day.