I fell asleep and missed my stop!
ad-dor-men-TA-to — stress on fourth syllable. sal-TA-to — stress on second syllable.
When you wake up and realise you have gone past your destination.
'Mi sono addormentato' is reflexive passato prossimo of 'addormentarsi' (to fall asleep). 'Ho saltato la mia fermata' (I missed my stop) — 'saltato' literally means 'jumped over'. Both use passato prossimo for recent past events. This is a surprisingly common situation on long Italian train journeys.
Devo tornare indietro — posso prendere il treno nella direzione opposta?
I need to go back — can I take the train in the opposite direction?
You need a new ticket for the return journey
Sono andato troppo avanti. Dove sono adesso?
I've gone too far. Where am I now?
Look at the station name as the train arrives
Quanto costa un biglietto da qui per tornare?
How much does a ticket cost from here to go back?
Buy at the machine or counter at the station you've arrived at
Missing a stop by falling asleep is common on long Italian journeys, especially night trains. Setting a phone alarm 5 minutes before your destination is strongly recommended. The Trenitalia app shows your real-time position and can send notifications. If you miss your stop, you need a new ticket — the original is not valid for the extended journey or return.