| Gouveia to Oberkirch | 948.39 mi (1,526.28 km) |
| Gouveia to Obernburg am Main | 1,035.93 mi (1,667.16 km) |
| Gouveia to Obernkirchen | 1,133.08 mi (1,823.51 km) |
| Gouveia to Oberschleissheim | 1,083.21 mi (1,743.25 km) |
| Gouveia to Oberstdorf | 1,006.00 mi (1,619.01 km) |
| Gouveia to Obertraubling | 1,127.87 mi (1,815.13 km) |
| Gouveia to Obertshausen | 1,032.91 mi (1,662.30 km) |
| Gouveia to Oberursel | 1,028.77 mi (1,655.64 km) |
| Gouveia to Ochsenfurt | 1,064.62 mi (1,713.34 km) |
| Gouveia to Ochsenhausen | 1,009.93 mi (1,625.32 km) |
| Gouveia to Ochtrup | 1,068.98 mi (1,720.36 km) |
| Gouveia to Odenthal | 1,012.65 mi (1,629.71 km) |
| Gouveia to Oelde | 1,082.32 mi (1,741.83 km) |
| Gouveia to Oelsnitz | 1,171.81 mi (1,885.85 km) |
| Gouveia to Oer-Erkenschwick | 1,044.59 mi (1,681.11 km) |
