Florida Keys Marathon Airport

Aircraft should park in the CBP box. The FIS is not attached to the FBO or main terminal. A CBP Officer will meet the aircraft on the ramp to begin the inspection. the FBO for Marathon is Million Air (305) 743-1995.

• Aircraft should park in the CBP box.
• The FIS is not attached to the FBO or main terminal.
• A CBP Officer will meet the aircraft on the ramp to begin the inspection.
• All crew and passengers will be processed inside the FIS.
• Be prepared to present passports, visas, pilot’s license, medical certificate, aircraft registration, and user fee decal (if appropriate).
• Regulated waste/garbage will be collected by CBP from the aircraft crew.
• Passengers can depart directly from FIS at the conclusion of their inspection or with the aircraft.

Commercial aircraft operators departing the U.S. must obtain an outbound clearance by contacting CBP directly. Marathon International Airport (KMTH) is designated as a “user fee airport” [19 CFR 122.1(m);19 CFR 122.15]. Pilots must secure permission to land by contacting CBP during regular office hours, prior to departure from the foreign port or place. Permission to land is granted with a tolerance of (+/-) 30 minutes. If your ETA deviates outside those parameters, Previously granted permission(s) are invalid and you must contact CBP to re-secure permission to land.

• the FBO for Marathon is Million Air (305) 743-1995. NOTE: For further detailed information regarding national GA processing standards and procedures, please refer to the CBP Private Aircraft Arrival Information Document or contact GAsupport@cbp.dhs.gov March 3, 2026 Publication Number KMTH-0326 Marathon International Airport (KMTH)

• Inspection services for the entrance/ arrival of aircraft at Marathon International Airport are available Thursday- Monday, 0930-1700 in accordance with the port's
• the FBO for Marathon is Million Air (305) 743-1995. NOTE: For further detailed information regarding national GA processing standards and procedures, please refer to the CBP Private Aircraft Arrival Information Document or contact GAsupport@cbp.dhs.gov March 3, 2026 Publication Number KMTH-0326 Marathon International Airport (KMTH) Commercial aircraft operators departing the U.S. must obtain an outbound clearance by contacting CBP directly. Marathon International Airport (KMTH) is designated as a “user fee airport” [19 CFR 122.1(m);19 CFR 122.15]. Pilots must secure permission to land by contacting CBP during regular office hours, prior to departure from the foreign port or place. Permission to land is granted with a tolerance of (+/-) 30 minutes. If your ETA deviates outside those parameters, Previously granted permission(s) are invalid and you must contact CBP to re-secure permission to land.

• Inspection services for the entrance/ arrival of aircraft at Marathon International Airport are available Thursday- Monday, 0930-1700 in accordance with the port's
• the FBO for Marathon is Million Air (305) 743-1995. NOTE: For further detailed information regarding national GA processing standards and procedures, please refer to the CBP Private Aircraft Arrival Information Document or contact GAsupport@cbp.dhs.gov March 3, 2026 Publication Number KMTH-0326 Marathon International Airport (KMTH)