Cheap flights from North America to St. Louis from $43

In general, October is the cheapest month to fly from North America to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $330. The month of August is another great option to travel to St. Louis, with average flight prices from North America averaging around $331.

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $354. 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 $478. 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 North America in the evening is the least expensive time of day to depart. momondo users have found prices as low as $373 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 $387 per ticket.

Fly from Atlanta Hartsfield-Jackson to Lambert-St Louis for the best North America - Lambert-St Louis flight prices

No. A direct flight is the cheapest option for a flight between North America to St. Louis.

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

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to St. Louis from North America according to our data. Southwest is the first choice among our users, with 33% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 9 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

As of May 2026, there are 73 flights per day flying from North America to St. Louis. The most common time of day flights depart is 5:00PM, with 39% of flights taking off in the evening.

As of May 2026, there are 514 flights per week flying from North America to St. Louis. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.