| Cities | Distance |
|---|---|
| Viterbo to Orbetello | 45.50 mi (73.22 km) |
| Viterbo to Oria | 315.41 mi (507.61 km) |
| Viterbo to Oristano | 252.00 mi (405.56 km) |
| Viterbo to Orta Nova | 200.20 mi (322.19 km) |
| Viterbo to Orte | 14.66 mi (23.59 km) |
| Viterbo to Ortona | 117.26 mi (188.71 km) |
| Viterbo to Orvieto | 20.71 mi (33.33 km) |
| Viterbo to Orzinuovi | 232.60 mi (374.33 km) |
| Viterbo to Osimo | 101.37 mi (163.13 km) |
| Viterbo to Ospitaletto | 239.07 mi (384.74 km) |
| Viterbo to Ostuni | 306.13 mi (492.66 km) |
| Viterbo to Ottaviano | 163.59 mi (263.28 km) |
| Viterbo to Ovada | 231.36 mi (372.33 km) |
| Viterbo to Ozieri | 204.42 mi (328.99 km) |
| Viterbo to Paceco | 307.35 mi (494.63 km) |