| Castel Gandolfo to Minturno | 65.80 mi (105.89 km) |
| Castel Gandolfo to Mira | 256.31 mi (412.50 km) |
| Castel Gandolfo to Mirandola | 231.15 mi (372.00 km) |
| Castel Gandolfo to Mirano | 260.78 mi (419.68 km) |
| Castel Gandolfo to Misano Adriatico | 153.39 mi (246.86 km) |
| Castel Gandolfo to Misilmeri | 260.05 mi (418.50 km) |
| Castel Gandolfo to Missaglia | 319.40 mi (514.02 km) |
| Castel Gandolfo to Misterbianco | 317.87 mi (511.57 km) |
| Castel Gandolfo to Modena | 218.34 mi (351.38 km) |
| Castel Gandolfo to Modica | 355.48 mi (572.09 km) |
| Castel Gandolfo to Modugno | 218.90 mi (352.29 km) |
| Castel Gandolfo to Mogliano Veneto | 264.41 mi (425.52 km) |
| Castel Gandolfo to Molfetta | 207.83 mi (334.47 km) |
| Castel Gandolfo to Molinella | 204.40 mi (328.95 km) |
| Castel Gandolfo to Moncalieri | 335.69 mi (540.24 km) |
