The Florida Keys Marathon International Airport (ICAO: KMTH) is a public airport located along the Overseas Highway (US1) in Marathon, in Monroe County, Florida, United States. The airport covers 197 acres (80 ha) and has one runway (07/25) whose length is 5008 ft (1526 m). In January 2022, MILLION AIR acquired the former Marathon Jet Center. Centrally located between Key Largo and Key West, the FBO provides easy access to all the islands of the archipelago and offers a less congested altern... The Florida Keys Marathon International Airport (ICAO: KMTH) is a public airport located along the Overseas Highway (US1) in Marathon, in Monroe County, Florida, United States. The airport covers 197 acres (80 ha) and has one runway (07/25) whose length is 5008 ft (1526 m). In January 2022, MILLION AIR acquired the former Marathon Jet Center. Centrally located between Key Largo and Key West, the FBO provides easy access to all the islands of the archipelago and offers a less congested alternative to Key West International Airport, about 45 minutes away by car. The word “Key” is derived from the word “Cayo”, meaning small island. The Florida Keys Marathon airport offer 180 miles of 800 different keys. Your visit will provide you with a glimpse into the different ecosystems, turquoise waters for boating and world-renowned fishing, not to be missed epic sunsets. Florida Keys Marathon is a great airport to fly in and out of. A short, scenic hop from Miami or Key West. A must visit airport if your helicopter or plane's skin needs the Florida Key sunshine!