| Grinon to Oberkirch | 821.30 mi (1,321.76 km) |
| Grinon to Obernburg am Main | 916.46 mi (1,474.90 km) |
| Grinon to Obernkirchen | 1,034.52 mi (1,664.90 km) |
| Grinon to Oberschleissheim | 940.84 mi (1,514.14 km) |
| Grinon to Oberstdorf | 859.99 mi (1,384.02 km) |
| Grinon to Obertraubling | 989.84 mi (1,592.99 km) |
| Grinon to Obertshausen | 916.88 mi (1,475.58 km) |
| Grinon to Oberursel | 915.17 mi (1,472.83 km) |
| Grinon to Ochsenfurt | 939.61 mi (1,512.15 km) |
| Grinon to Ochsenhausen | 871.03 mi (1,401.79 km) |
| Grinon to Ochtrup | 979.80 mi (1,576.84 km) |
| Grinon to Odenthal | 914.03 mi (1,470.99 km) |
| Grinon to Oelde | 984.99 mi (1,585.19 km) |
| Grinon to Oelsnitz | 1,045.81 mi (1,683.08 km) |
| Grinon to Oer-Erkenschwick | 950.45 mi (1,529.60 km) |
