score:7
It may be too early to see and book all specific options. Airlines may add routes or schedules yet and buses usually don't publish schedules more than a half a year in advance (often even less).
Fly direct to Trieste (1:20) + bus to Ljubljana (1:44)
Fly direct to Treviso (1:20) + bus to Ljubljana (2:30)
Fly direct to Venice Marco Polo (1:20) + bus to Ljubljana (2:49)
Full disclosure: I work for Busbud, the site showing various bus lines.
Upvote:1
From Rome2rio, the quickest way is to take a flight from Naples to Trieste (TRS) ans then a 1 hour 15 minute shuttle to Ljubljana.