| Castel Gandolfo to Mondolfo | 140.26 mi (225.72 km) |
| Castel Gandolfo to Mondovi | 304.46 mi (489.99 km) |
| Castel Gandolfo to Monesiglio | 295.98 mi (476.33 km) |
| Castel Gandolfo to Monfalcone | 283.47 mi (456.20 km) |
| Castel Gandolfo to Monopoli | 247.26 mi (397.93 km) |
| Castel Gandolfo to Monreale | 255.48 mi (411.15 km) |
| Castel Gandolfo to Monselice | 245.09 mi (394.43 km) |
| Castel Gandolfo to Monserrato | 252.18 mi (405.84 km) |
| Castel Gandolfo to Monsummano | 173.50 mi (279.22 km) |
| Castel Gandolfo to Montagnana | 248.11 mi (399.29 km) |
| Castel Gandolfo to Montale | 172.28 mi (277.26 km) |
| Castel Gandolfo to Montalto di Castro | 68.18 mi (109.73 km) |
| Castel Gandolfo to Montalto Uffugo | 244.90 mi (394.14 km) |
| Castel Gandolfo to Monte Compatri | 6.10 mi (9.82 km) |
| Castel Gandolfo to Monte di Procida | 97.73 mi (157.28 km) |
