I flew on TAG (Transportes Aereos Guatemaltecos) in August, 2002. They are a charter airline based at Guatemala City La Aurura International Airport and sell theie capacity to travel agencies and tour groups visiting the Tikal Ruins near Flores. They also operate charters for hire to destinations throughout Central America.
I flew on them from Guatemala City to Flores on one of their two LET-410's out of their own terminal located on the north side of the La Aurora airfield. Our travel agency sent a car to pick us up at our hotel and then took us to their terminal which is not located in public area (security checkpoint). Our flight was fully booked, mostly with Spanish language students from Antigua wanting to see Tikal. When walking to the plane I noticed that TAG also operates other general aviation type aircraft, including what I think was a King Air, and a Cessna 420.
At Flores Airport, TAG is handled by Tropical Air, an airline based in Belize. The LET-410s were showing their age a bit, but they got us from point A to point B without any problems.
Not all who wander are lost....