Cheap flights from North America to St. Louis from $21

In general, January 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 $372. The month of February is another great option to travel to St. Louis, with average flight prices from North America averaging around $379.

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $397. 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 $512. 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 morning is the least expensive time of day to depart. momondo users have found prices as low as $419 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $458 per ticket.

Fly from Dallas/Fort Worth 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.

You could potentially save up to 12% on your flight if you consider stops on a North America to St. Louis flight.

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

Southwest, American Airlines 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 36% 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.

Historically, on average around 19% of flights between North America and St. Louis have experienced a delay on any given week. The average delay length over the past 12 months has been 129 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Southwest have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

As of November 2026, there are 72 flights per day flying from North America to St. Louis. The most common time of day flights depart is 3:00PM, with 45% of flights taking off in the afternoon.

As of November 2026, there are 505 flights per week flying from North America to St. Louis. The most common day of the week flights depart is Sun, with 23% of flights taking off on this day.