| Viseu to Oberkirch | 953.52 mi (1,534.55 km) |
| Viseu to Obernburg am Main | 1,039.99 mi (1,673.71 km) |
| Viseu to Obernkirchen | 1,134.57 mi (1,825.92 km) |
| Viseu to Oberschleissheim | 1,090.01 mi (1,754.20 km) |
| Viseu to Oberstdorf | 1,013.39 mi (1,630.90 km) |
| Viseu to Obertraubling | 1,134.06 mi (1,825.09 km) |
| Viseu to Obertshausen | 1,036.58 mi (1,668.21 km) |
| Viseu to Oberursel | 1,032.16 mi (1,661.10 km) |
| Viseu to Ochsenfurt | 1,069.30 mi (1,720.87 km) |
| Viseu to Ochsenhausen | 1,016.40 mi (1,635.74 km) |
| Viseu to Ochtrup | 1,069.55 mi (1,721.27 km) |
| Viseu to Odenthal | 1,014.37 mi (1,632.48 km) |
| Viseu to Oelde | 1,083.77 mi (1,744.15 km) |
| Viseu to Oelsnitz | 1,176.45 mi (1,893.31 km) |
| Viseu to Oer-Erkenschwick | 1,045.75 mi (1,682.98 km) |
