We are doing a 10 day hiking trip starting and ending in Split. Flying from the U.S. to Zagreb we plan to take a bus to Split. Then we have 2 or 3 extra days before flying to Stuttgart Germany. Best use of that time and which airport to fly from in Croatia?
Of the 3 most obvious airport choices, only Zagreb has a non-stop flight to Stuttgart. Split and Dubrovnik only have flights with 1 or 2 stops that take considerably longer. If you decide to fly to Stuttgart from Zagreb, I would stop for a night in Plitvice and then spend the remainder of your time in Zagreb. There have been some recent posts about interesting activities in Zagreb.