Cheap flights from Louisiana to St. Louis from $74

In general, March 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 $358. The month of July is another great option to travel to St. Louis, with average flight prices from Louisiana averaging around $360.

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $339. 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 $534. 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 afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $395 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 Lambert-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 3% on your flight if you consider stops on a Louisiana to St. Louis flight.

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

American Airlines, Southwest and Delta 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 42% 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 6 per week as of March 2026. The most frequent departure day is Fri, with 50% of weekly flights leaving on this day.

Flight times from Louisiana to St. Louis vary, but if you’re flying out of New Orleans and flying into St. Louis (one of the most popular routes), then the duration is 1h 45m on average. Another popular route from Louisiana to St. Louis is flying from Shreveport to St. Louis, which will take roughly 4h 10m. Keep in mind that layovers or delays could extend your travel time.