| Gantt to Oberkirch | 4,489.96 mi (7,225.90 km) |
| Gantt to Obernburg am Main | 4,495.01 mi (7,234.02 km) |
| Gantt to Obernkirchen | 4,424.33 mi (7,120.27 km) |
| Gantt to Oberschleissheim | 4,642.05 mi (7,470.66 km) |
| Gantt to Oberstdorf | 4,615.24 mi (7,427.51 km) |
| Gantt to Obertraubling | 4,643.72 mi (7,473.34 km) |
| Gantt to Obertshausen | 4,475.98 mi (7,203.40 km) |
| Gantt to Oberursel | 4,461.72 mi (7,180.45 km) |
| Gantt to Ochsenfurt | 4,537.96 mi (7,303.14 km) |
| Gantt to Ochsenhausen | 4,581.01 mi (7,372.42 km) |
| Gantt to Ochtrup | 4,351.16 mi (7,002.52 km) |
| Gantt to Odenthal | 4,379.95 mi (7,048.85 km) |
| Gantt to Oelde | 4,398.80 mi (7,079.18 km) |
| Gantt to Oelsnitz | 4,598.04 mi (7,399.83 km) |
| Gantt to Oer-Erkenschwick | 4,368.71 mi (7,030.75 km) |
