Aircraft Detailing at Florida Keys Marathon International Airport

The single runway, 7/25, measures 5,008 by 100 feet, and the county says a runway renovation was completed in October 2025. There is no control tower: FAA data effective 29 October 2026 lists airport attendance from 0800 to 1800 and self-service fuel around the clock. Million Air Florida Keys gives its own hours as 0700 to 1900, lists customs, catering and vehicle rentals, and pitches the field as a less congested option than Key West, under an hour away.

Customs is a user fee facility. The county lists Customs and Border Protection on site from 9 a.m. to 5:30 p.m. Thursday through Monday, after hours by appointment only, and FAA data adds that the office is closed to arrivals on Tuesdays and Wednesdays unless the agency approves a request.

Traffic is mixed. The NATA and AvAdvisors 2025 table puts Marathon at 5,205 business-jet movements and 1,963 piston movements, and the county notes that the field supports emergency services and disaster response as well as visitors. The Key West Weather Service office calls December through April the dry season, with just under a quarter of annual rain, and its 1991 to 2020 normals give Marathon 39.72 inches a year.