| Penafiel to Oberkirch | 944.98 mi (1,520.80 km) |
| Penafiel to Obernburg am Main | 1,029.12 mi (1,656.21 km) |
| Penafiel to Obernkirchen | 1,118.48 mi (1,800.02 km) |
| Penafiel to Oberschleissheim | 1,084.87 mi (1,745.92 km) |
| Penafiel to Oberstdorf | 1,009.62 mi (1,624.83 km) |
| Penafiel to Obertraubling | 1,127.54 mi (1,814.60 km) |
| Penafiel to Obertshausen | 1,024.89 mi (1,649.40 km) |
| Penafiel to Oberursel | 1,019.92 mi (1,641.41 km) |
| Penafiel to Ochsenfurt | 1,059.65 mi (1,705.34 km) |
| Penafiel to Ochsenhausen | 1,010.63 mi (1,626.45 km) |
| Penafiel to Ochtrup | 1,051.75 mi (1,692.62 km) |
| Penafiel to Odenthal | 998.84 mi (1,607.48 km) |
| Penafiel to Oelde | 1,067.63 mi (1,718.18 km) |
| Penafiel to Oelsnitz | 1,166.61 mi (1,877.48 km) |
| Penafiel to Oer-Erkenschwick | 1,029.11 mi (1,656.19 km) |
