Please take me to...
'Porta' — 'POR-ta'. Here it means 'take/bring' (third-person formal of 'portare'), not 'door'.
The fundamental taxi destination phrase. State your destination clearly after 'a'. Works for any location: street address, landmark, hotel.
'Mi porta' uses the formal 'Lei' form of 'portare' (to take/bring). 'Per favore' (please) makes it polite. This is the most natural way to give a destination in an Italian taxi.
Vada in via..., per favore.
Please go to... street.
'Vada' is the formal imperative of 'andare'; used when giving a street address.
All'aeroporto, grazie.
To the airport, thank you.
Very short; just state the destination with 'al/alla/all''.
Mi porti all'Hotel...
Take me to Hotel...
Formal subjunctive 'porti' — slightly more emphatic than 'porta'.
Italian taxi drivers are generally knowledgeable about their city's geography. Giving a nearby landmark as reference ('vicino a...') is often clearer than reading out a full address.