| Castel Gandolfo to Matelica | 105.89 mi (170.41 km) |
| Castel Gandolfo to Matera | 218.35 mi (351.40 km) |
| Castel Gandolfo to Matino | 309.75 mi (498.49 km) |
| Castel Gandolfo to Mazzarino | 318.12 mi (511.96 km) |
| Castel Gandolfo to Meda | 321.87 mi (518.01 km) |
| Castel Gandolfo to Medesano | 243.12 mi (391.26 km) |
| Castel Gandolfo to Medicina | 195.92 mi (315.30 km) |
| Castel Gandolfo to Meldola | 167.67 mi (269.84 km) |
| Castel Gandolfo to Melegnano | 300.02 mi (482.84 km) |
| Castel Gandolfo to Melendugno | 313.31 mi (504.23 km) |
| Castel Gandolfo to Melfi | 163.78 mi (263.58 km) |
| Castel Gandolfo to Melilli | 341.58 mi (549.73 km) |
| Castel Gandolfo to Melito di Napoli | 100.11 mi (161.11 km) |
| Castel Gandolfo to Melito di Porto Salvo | 312.42 mi (502.79 km) |
| Castel Gandolfo to Melzo | 305.60 mi (491.81 km) |
