| Grevena to Oststeinbek | 1,068.68 mi (1,719.87 km) |
| Grevena to Ottendorf-Okrilla | 848.88 mi (1,366.15 km) |
| Grevena to Ottersberg | 1,068.36 mi (1,719.36 km) |
| Grevena to Ottobrunn | 732.91 mi (1,179.50 km) |
| Grevena to Ottweiler | 946.50 mi (1,523.24 km) |
| Grevena to Overath | 1,012.11 mi (1,628.83 km) |
| Grevena to Oyten | 1,069.60 mi (1,721.36 km) |
| Grevena to Paderborn | 1,005.59 mi (1,618.34 km) |
| Grevena to Papenburg | 1,113.07 mi (1,791.31 km) |
| Grevena to Parchim | 1,024.90 mi (1,649.42 km) |
| Grevena to Pasewalk | 989.94 mi (1,593.16 km) |
| Grevena to Passau | 705.50 mi (1,135.38 km) |
| Grevena to Pattensen | 1,007.02 mi (1,620.65 km) |
| Grevena to Pegnitz | 823.28 mi (1,324.94 km) |
| Grevena to Peine | 998.03 mi (1,606.18 km) |
