| Flowing Wells to Oerlinghausen | 5,570.46 mi (8,964.78 km) |
| Flowing Wells to Oestrich-Winkel | 5,639.35 mi (9,075.66 km) |
| Flowing Wells to Offenburg | 5,707.59 mi (9,185.48 km) |
| Flowing Wells to Oftersheim | 5,687.85 mi (9,153.70 km) |
| Flowing Wells to Ohrdruf | 5,689.25 mi (9,155.97 km) |
| Flowing Wells to Ohringen | 5,726.24 mi (9,215.49 km) |
| Flowing Wells to Olbernhau | 5,778.22 mi (9,299.15 km) |
| Flowing Wells to Olching | 5,833.89 mi (9,388.74 km) |
| Flowing Wells to Oldenburg | 5,502.19 mi (8,854.91 km) |
| Flowing Wells to Oldenburg in Holstein | 5,529.12 mi (8,898.25 km) |
| Flowing Wells to Olfen | 5,540.83 mi (8,917.10 km) |
| Flowing Wells to Olpe | 5,587.29 mi (8,991.88 km) |
| Flowing Wells to Olsberg | 5,593.04 mi (9,001.13 km) |
| Flowing Wells to Oranienburg | 5,672.85 mi (9,129.57 km) |
| Flowing Wells to Ortenberg | 5,657.60 mi (9,105.03 km) |
