| Viseu to Opole | 1,416.08 mi (2,278.97 km) |
| Viseu to Orzesze | 1,439.27 mi (2,316.28 km) |
| Viseu to Osowa | 1,539.59 mi (2,477.73 km) |
| Viseu to Ostroda | 1,572.85 mi (2,531.27 km) |
| Viseu to Ostroleka | 1,617.84 mi (2,603.67 km) |
| Viseu to Ostrow Mazowiecka | 1,624.76 mi (2,614.80 km) |
| Viseu to Ostrow Wielkopolski | 1,435.08 mi (2,309.54 km) |
| Viseu to Ostrowiec Swietokrzyski | 1,566.08 mi (2,520.36 km) |
| Viseu to Ostrzeszow | 1,433.89 mi (2,307.63 km) |
| Viseu to Oswiecim | 1,457.14 mi (2,345.03 km) |
| Viseu to Otwock | 1,584.37 mi (2,549.80 km) |
| Viseu to Ozarow Mazowiecki | 1,567.86 mi (2,523.23 km) |
| Viseu to Ozimek | 1,427.81 mi (2,297.84 km) |
| Viseu to Ozorkow | 1,501.44 mi (2,416.33 km) |
| Viseu to Pabianice | 1,497.93 mi (2,410.69 km) |
