| Gantt to Oerlinghausen | 4,415.25 mi (7,105.66 km) |
| Gantt to Oestrich-Winkel | 4,444.27 mi (7,152.35 km) |
| Gantt to Offenburg | 4,485.68 mi (7,219.00 km) |
| Gantt to Oftersheim | 4,486.15 mi (7,219.77 km) |
| Gantt to Ohrdruf | 4,529.10 mi (7,288.88 km) |
| Gantt to Ohringen | 4,528.49 mi (7,287.90 km) |
| Gantt to Olbernhau | 4,635.74 mi (7,460.50 km) |
| Gantt to Olching | 4,633.40 mi (7,456.73 km) |
| Gantt to Oldenburg | 4,365.42 mi (7,025.47 km) |
| Gantt to Oldenburg in Holstein | 4,433.26 mi (7,134.65 km) |
| Gantt to Olfen | 4,371.91 mi (7,035.90 km) |
| Gantt to Olpe | 4,408.96 mi (7,095.54 km) |
| Gantt to Olsberg | 4,425.37 mi (7,121.95 km) |
| Gantt to Oranienburg | 4,566.46 mi (7,349.01 km) |
| Gantt to Ortenberg | 4,476.50 mi (7,204.24 km) |
