Stuttgart can be reached by plane from many European airports. In addition, there are flights from Stuttgart to Atlanta in the USA, to Moscow, Tel Aviv and to various North African and Arabic countries.

From most German airports there are flight connections to Stuttgart Airport (STR):

Flight from Berlin Tegel (TXL) to Stuttgart (STR)
Flight from Bremen (BRE) to Stuttgart (STR)
Flight from Dresden (DRS to Stuttgart (STR)
Flight from Düsseldorf (DUS) to Stuttgart (STR)
Flight from Frankfurt (FRA) to Stuttgart (STR)
Flight from Hamburg (HAM) to Stuttgart (STR)
Flight from Hannover (HAJ) to Stuttgart (STR)
Flight from Heringsdorf (HDF) to Stuttgart (STR)
Flight from Leipzig-Halle (LEJ) to Stuttgart (STR)
Flight from München (MUC) to Stuttgart (STR)
Flight from Münster-Osnabrück (FMO) to Stuttgart (STR)
Flight from Rostok-Laage (RLG) to Stuttgart (STR)

 

Please note that there is also the IATA code 'ZWS' for Stuttgart. However, this code stands for Stuttgart Central Railway Station and is used by Lufthansa together with Deutsche Bahn and Frankfurt Airport. ICE trains running between Stuttgart Central Station and Frankfurt Airport station sometimes have an additional Lufthansa flight number. This allows travellers to travel to Frankfurt Airport instead of using a connection flight.