| Frankfort to Oberkirch | 4,429.95 mi (7,129.32 km) |
| Frankfort to Obernburg am Main | 4,427.44 mi (7,125.28 km) |
| Frankfort to Obernkirchen | 4,345.76 mi (6,993.82 km) |
| Frankfort to Oberschleissheim | 4,577.75 mi (7,367.18 km) |
| Frankfort to Oberstdorf | 4,556.77 mi (7,333.41 km) |
| Frankfort to Obertraubling | 4,575.31 mi (7,363.25 km) |
| Frankfort to Obertshausen | 4,407.84 mi (7,093.74 km) |
| Frankfort to Oberursel | 4,393.34 mi (7,070.40 km) |
| Frankfort to Ochsenfurt | 4,469.84 mi (7,193.51 km) |
| Frankfort to Ochsenhausen | 4,520.13 mi (7,274.44 km) |
| Frankfort to Ochtrup | 4,275.47 mi (6,880.70 km) |
| Frankfort to Odenthal | 4,309.83 mi (6,935.99 km) |
| Frankfort to Oelde | 4,323.54 mi (6,958.06 km) |
| Frankfort to Oelsnitz | 4,523.30 mi (7,279.54 km) |
| Frankfort to Oer-Erkenschwick | 4,295.56 mi (6,913.04 km) |
