| Viterbo to Marsala | 319.72 mi (514.54 km) |
| Viterbo to Marsciano | 36.33 mi (58.47 km) |
| Viterbo to Martano | 356.11 mi (573.10 km) |
| Viterbo to Martellago | 216.15 mi (347.85 km) |
| Viterbo to Martina Franca | 295.21 mi (475.09 km) |
| Viterbo to Martinengo | 246.78 mi (397.16 km) |
| Viterbo to Martinsicuro | 97.54 mi (156.98 km) |
| Viterbo to Mascali | 361.64 mi (582.01 km) |
| Viterbo to Mascalucia | 369.66 mi (594.91 km) |
| Viterbo to Masera di Padova | 200.59 mi (322.82 km) |
| Viterbo to Maserada sul Piave | 230.42 mi (370.82 km) |
| Viterbo to Massa | 149.30 mi (240.27 km) |
| Viterbo to Massa Lombarda | 141.10 mi (227.07 km) |
| Viterbo to Massafra | 288.65 mi (464.54 km) |
| Viterbo to Massalubrense | 170.28 mi (274.03 km) |
