| Castel Gandolfo to Monticello Conte Otto | 271.52 mi (436.97 km) |
| Castel Gandolfo to Montichiari | 277.58 mi (446.72 km) |
| Castel Gandolfo to Montignoso | 201.04 mi (323.55 km) |
| Castel Gandolfo to Montopoli in Val d'Arno | 164.06 mi (264.03 km) |
| Castel Gandolfo to Monza | 314.23 mi (505.70 km) |
| Castel Gandolfo to Morbegno | 339.66 mi (546.62 km) |
| Castel Gandolfo to Mori | 295.44 mi (475.46 km) |
| Castel Gandolfo to Morlupo | 28.43 mi (45.75 km) |
| Castel Gandolfo to Morrovalle | 118.37 mi (190.51 km) |
| Castel Gandolfo to Mortara | 311.09 mi (500.65 km) |
| Castel Gandolfo to Mosciano Sant'Angelo | 93.65 mi (150.71 km) |
| Castel Gandolfo to Motta di Livenza | 278.65 mi (448.44 km) |
| Castel Gandolfo to Motta Sant'Anastasia | 318.21 mi (512.11 km) |
| Castel Gandolfo to Mottola | 240.42 mi (386.92 km) |
| Castel Gandolfo to Mozzate | 328.78 mi (529.11 km) |
