| Castel Gandolfo to Mendicino | 253.13 mi (407.37 km) |
| Castel Gandolfo to Menfi | 286.48 mi (461.04 km) |
| Castel Gandolfo to Mentana | 18.64 mi (30.00 km) |
| Castel Gandolfo to Merano | 348.05 mi (560.13 km) |
| Castel Gandolfo to Merate | 316.84 mi (509.91 km) |
| Castel Gandolfo to Mercato San Severino | 128.43 mi (206.69 km) |
| Castel Gandolfo to Mercogliano | 122.50 mi (197.14 km) |
| Castel Gandolfo to Mesagne | 279.90 mi (450.45 km) |
| Castel Gandolfo to Messina | 289.60 mi (466.06 km) |
| Castel Gandolfo to Mestre | 259.49 mi (417.61 km) |
| Castel Gandolfo to Mestrino | 259.66 mi (417.88 km) |
| Castel Gandolfo to Milan | 309.87 mi (498.68 km) |
| Castel Gandolfo to Milazzo | 279.63 mi (450.03 km) |
| Castel Gandolfo to Minerbio | 207.05 mi (333.22 km) |
| Castel Gandolfo to Minervino Murge | 183.30 mi (294.99 km) |
