Cheap flights from North America to St. Louis from $19

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 $338. The month of September is another great option to travel to St. Louis, with average flight prices from North America averaging around $363.

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $384. 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 Monday because tickets tend to average around $497. 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 $395 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 $428 per ticket.

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

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

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

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

Southwest, Frontier and United Airlines 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 32% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 8 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 103 flights per day flying from North America to St. Louis. The most common time of day flights depart is 5:00PM, with 49% of flights taking off in the afternoon.

As of August 2026, there are 721 flights per week flying from North America to St. Louis. The most common day of the week flights depart is Sun, with 19% of flights taking off on this day.