Cheap flights from New Orleans to St. Louis from $35

In general, March is the cheapest month to fly from New Orleans 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 New Orleans 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 $340. 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 New Orleans in the morning is the least expensive time of day to depart. momondo users have found prices as low as $379 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $392 per ticket.

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

There is only 1 cabin class available to choose from on New Orleans Louis Armstrong 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 6% on your flight if you consider stops on a New Orleans to St. Louis flight.

Frontier is the most popular carrier operating from New Orleans Louis Armstrong to Lambert-St Louis

Southwest, American Airlines and Delta are the top three most popular airlines that fly to St. Louis from New Orleans according to our data. Southwest is the first choice among our users, with 37% 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.

Houston (IAH) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Houston (IAH) offer the lowest average round-trip price of $322.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 4h 18m.

Dallas (DFW) has the shortest average layover time for this route: 0h 47m.

1 flights are operational daily from New Orleans to St. Louis as of February 2026. The most popular departure time for this route is 6:00AM, with 43% of flights per day taking off at noon.

As of February 2026, there are 9 flights per week flying from New Orleans to St. Louis. The most common day of the week flights depart is Mon, with 33% of flights taking off on this day.