SELECT V.nomecittaarri
FROM (VOLI AS V JOIN TIPI_AEREI AS T_A ON V.tipoaereo = T_A.tipoaereo) JOIN citta AS C_A ON V.nomecittaarri = C_A.nomecitta
WHERE C_A.stato = 'ITA'
GROUP BY (V.nomecittaarri)
HAVING SUM(T_A.capienza) = MAX (
    SELECT SUM(T_A.capienza)
     FROM (VOLI AS V JOIN TIPI_AEREI AS T_A ON V.tipoaereo = T_A.tipoaereo) JOIN citta AS C_A ON V.nomecittaarri = C_A.nomecitta
     WHERE C_A.stato = 'ITA'
     GROUP BY (V.nomecittaarri)
    );