| Frankfort to Oerlinghausen | 4,338.67 mi (6,982.41 km) |
| Frankfort to Oestrich-Winkel | 4,377.66 mi (7,045.16 km) |
| Frankfort to Offenburg | 4,426.21 mi (7,123.29 km) |
| Frankfort to Oftersheim | 4,421.56 mi (7,115.81 km) |
| Frankfort to Ohrdruf | 4,454.71 mi (7,169.16 km) |
| Frankfort to Ohringen | 4,463.26 mi (7,182.92 km) |
| Frankfort to Olbernhau | 4,558.10 mi (7,335.56 km) |
| Frankfort to Olching | 4,569.72 mi (7,354.26 km) |
| Frankfort to Oldenburg | 4,284.02 mi (6,894.47 km) |
| Frankfort to Oldenburg in Holstein | 4,343.12 mi (6,989.58 km) |
| Frankfort to Olfen | 4,298.23 mi (6,917.34 km) |
| Frankfort to Olpe | 4,337.91 mi (6,981.19 km) |
| Frankfort to Olsberg | 4,351.87 mi (7,003.66 km) |
| Frankfort to Oranienburg | 4,479.93 mi (7,209.74 km) |
| Frankfort to Ortenberg | 4,406.72 mi (7,091.93 km) |
