Both Planes Landed Safely After Collision On Approach To Florida Keys Marathon International Airport A Beechcraft B200 King Air was on approach to Marathon International Airport (KMTH) in the Florida Keys on Saturday when it struck the left wing of a Cessna 172, according to aviation-safety.net. The King Air was on a straight-in approach to the airport and the Cessna 172 was in the traffic pattern. Both planes landed safely and there were no injuries.