Where are the toilets?
BA-gni — the 'gn' is a nasal sound, like 'ny' in 'canyon'. Stress on first syllable.
The universal question you will need in every Italian public space.
'Bagni' (toilets/bathrooms) is the most common word used in public spaces. 'Dove sono' is 'where are' (plural). Alternatives include 'toilette' (borrowed from French, more formal), 'WC' (universal sign), and 'servizi igienici' (very formal). Signs in airports use WC or 'Servizi'.
Dov'è il bagno per disabili?
Where is the accessible toilet?
Required in all Italian public buildings
C'è un fasciatoio?
Is there a baby changing area?
'Fasciatoio' — a changing table for babies
I bagni sono gratuiti?
Are the toilets free?
Airport toilets in Italy are always free, unlike some train stations
Airport toilets in Italy are free and generally well-maintained. Unlike train station toilets in some Italian cities (which may charge €0.80-1.50), airport facilities are always complimentary. Baby changing facilities are standard in all modern Italian airports.