| Viterbo to Orzesze | 620.76 mi (999.01 km) |
| Viterbo to Osowa | 878.69 mi (1,414.11 km) |
| Viterbo to Ostroda | 858.65 mi (1,381.86 km) |
| Viterbo to Ostroleka | 855.42 mi (1,376.66 km) |
| Viterbo to Ostrow Mazowiecka | 848.42 mi (1,365.39 km) |
| Viterbo to Ostrow Wielkopolski | 691.66 mi (1,113.13 km) |
| Viterbo to Ostrowiec Swietokrzyski | 733.84 mi (1,181.00 km) |
| Viterbo to Ostrzeszow | 679.32 mi (1,093.26 km) |
| Viterbo to Oswiecim | 626.16 mi (1,007.71 km) |
| Viterbo to Otwock | 794.57 mi (1,278.73 km) |
| Viterbo to Ozarow Mazowiecki | 788.80 mi (1,269.45 km) |
| Viterbo to Ozimek | 639.43 mi (1,029.07 km) |
| Viterbo to Ozorkow | 739.98 mi (1,190.88 km) |
| Viterbo to Pabianice | 723.26 mi (1,163.97 km) |
| Viterbo to Parczew | 812.05 mi (1,306.87 km) |
