You have several possibilities to get to Leros island in the Dodecanese islands of Greece, Leros is connected to the other islands mostly by boat, but you also can get to Leros by airplane from Athens. You might also combine air and sea to arrive to the island of Leros. Here are some possiblities you have :
1 - You can take a flight from your home country to Athens airport, and then fly to Leros island with the following companie :
2 - You can take a flight from your home country to Athens airport and then take a ferry to Leros island.
3 - You can take a flight from your home country to Kos island airport and then take a ferry or Catamaran to Leros island.
4 - You can take a flight from your home country to Samos island airport and then take a ferry or Catamaran to Leros island.
5 - You can take a flight from your home country to Rhodes island airport and then take a ferry or Catamaran to Leros island.
All the ferry and flying dolphin timetable, as the name of the companies can be found with the following domestic sea schedule search engine :