Cheap flights from Miami to St. Louis from $66

In general, October is the cheapest month to fly from Miami to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $272. The month of August is another great option to travel to St. Louis, with average flight prices from Miami averaging around $297.

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $335. 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 $537. 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 Miami in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $355 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $390 per ticket.

Fly from Miami to Lambert-St Louis for the best Miami - Lambert-St Louis flight prices

You are more likely to see cheaper flights to St. Louis from Miami when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $345 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Miami for as low as $211 on momondo.

There are 3 cabin classes available to choose from on Miami 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 12% on your flight if you consider stops on a Miami to St. Louis flight.

As of February 2026, prices for Miami to St. Louis flights are approximately 16% more expensive when compared to flights at the same time last year.

Frontier is the most popular carrier operating from Miami to Lambert-St Louis

Southwest, American Airlines and Spirit Airlines are the top three most popular airlines that fly to St. Louis from Miami 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 5 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

6 flights are operational daily from Miami to St. Louis as of February 2026. The most popular departure time for this route is 9:00PM, with 55% of flights per day taking off in the evening.

The number of flights available between Miami and St. Louis is 48 per week as of February 2026. The most frequent departure day is Fri, with 21% of weekly flights leaving on this day.