The flight distance from The Florida Keys Marathon International Airport (MTH) in Marathon, United States to St Louis Lambert International Airport (STL) in St Louis, United States is 1,788 kilometers (1,111 miles / 966 nautical miles). The estimated flight time for this route is approximately 3h, flying north northwest at a heading of 333°.

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 1-hour time difference between the two cities.

Time zone information: When it's 16:54 in Marathon, it's 15:54 in St Louis.

The return flight from St Louis (STL) to Marathon (MTH) follows a heading of 148° (south southeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the The Florida Keys Marathon International Airport (MTH) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.