Cheap flights from Louisiana to St. Louis from $46

In general, February is the cheapest month to fly from Louisiana to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $273. The month of October is another great option to travel to St. Louis, with average flight prices from Louisiana averaging around $343.

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $312. 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 $587. 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 Louisiana at noon is the least expensive time of day to depart. momondo users have found prices as low as $377 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $466 per ticket.

Fly from New Orleans Louis Armstrong to Lambert-St Louis for the best Louisiana - Lambert-St Louis flight prices

There is only 1 cabin class available to choose from on Louisiana 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 11% on your flight if you consider stops on a Louisiana to St. Louis flight.

Frontier, Southwest, and United Airlines are the most popular carriers operating from Louisiana to Lambert-St Louis

American Airlines, Delta and Southwest are the top three most popular airlines that fly to St. Louis from Louisiana according to our data. American Airlines is the first choice among our users, with 34% 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.

The number of flights available between Louisiana and St. Louis is 1 per day as of July 2026. The most frequent departure time is 7:00AM, with 60% of daily flights leaving at noon.

The number of flights available between Louisiana and St. Louis is 11 per week as of July 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.