| Castel Gandolfo to Manfredonia | 168.62 mi (271.37 km) |
| Castel Gandolfo to Maniago | 305.40 mi (491.49 km) |
| Castel Gandolfo to Mantova | 253.37 mi (407.76 km) |
| Castel Gandolfo to Maranello | 212.51 mi (342.00 km) |
| Castel Gandolfo to Marano di Napoli | 98.68 mi (158.81 km) |
| Castel Gandolfo to Marano Vicentino | 279.82 mi (450.32 km) |
| Castel Gandolfo to Marcianise | 98.63 mi (158.74 km) |
| Castel Gandolfo to Marcon | 263.65 mi (424.31 km) |
| Castel Gandolfo to Mareno di Piave | 283.26 mi (455.87 km) |
| Castel Gandolfo to Margherita di Savoia | 182.74 mi (294.10 km) |
| Castel Gandolfo to Mariano Comense | 323.34 mi (520.37 km) |
| Castel Gandolfo to Marigliano | 108.90 mi (175.26 km) |
| Castel Gandolfo to Marino | 1.57 mi (2.52 km) |
| Castel Gandolfo to Marostica | 280.72 mi (451.77 km) |
| Castel Gandolfo to Marsala | 273.08 mi (439.48 km) |
