| Guymon to Oberkirch | 5,136.33 mi (8,266.12 km) |
| Guymon to Obernburg am Main | 5,117.52 mi (8,235.86 km) |
| Guymon to Obernkirchen | 5,012.57 mi (8,066.96 km) |
| Guymon to Oberschleissheim | 5,272.18 mi (8,484.75 km) |
| Guymon to Oberstdorf | 5,264.11 mi (8,471.77 km) |
| Guymon to Obertraubling | 5,260.71 mi (8,466.29 km) |
| Guymon to Obertshausen | 5,097.05 mi (8,202.91 km) |
| Guymon to Oberursel | 5,082.29 mi (8,179.15 km) |
| Guymon to Ochsenfurt | 5,157.89 mi (8,300.82 km) |
| Guymon to Ochsenhausen | 5,223.01 mi (8,405.62 km) |
| Guymon to Ochtrup | 4,950.40 mi (7,966.90 km) |
| Guymon to Odenthal | 4,996.58 mi (8,041.21 km) |
| Guymon to Oelde | 4,998.45 mi (8,044.23 km) |
| Guymon to Oelsnitz | 5,195.33 mi (8,361.08 km) |
| Guymon to Oer-Erkenschwick | 4,975.85 mi (8,007.85 km) |
