| Sulphur Springs to Oerlinghausen | 4,998.14 mi (8,043.73 km) |
| Sulphur Springs to Oestrich-Winkel | 5,044.77 mi (8,118.77 km) |
| Sulphur Springs to Offenburg | 5,098.13 mi (8,204.65 km) |
| Sulphur Springs to Oftersheim | 5,089.96 mi (8,191.50 km) |
| Sulphur Springs to Ohrdruf | 5,115.51 mi (8,232.62 km) |
| Sulphur Springs to Ohringen | 5,131.07 mi (8,257.67 km) |
| Sulphur Springs to Olbernhau | 5,215.79 mi (8,394.01 km) |
| Sulphur Springs to Olching | 5,238.30 mi (8,430.24 km) |
| Sulphur Springs to Oldenburg | 4,939.64 mi (7,949.58 km) |
| Sulphur Springs to Oldenburg in Holstein | 4,990.41 mi (8,031.29 km) |
| Sulphur Springs to Olfen | 4,960.24 mi (7,982.73 km) |
| Sulphur Springs to Olpe | 5,001.82 mi (8,049.65 km) |
| Sulphur Springs to Olsberg | 5,013.80 mi (8,068.93 km) |
| Sulphur Springs to Oranienburg | 5,129.99 mi (8,255.91 km) |
| Sulphur Springs to Ortenberg | 5,071.34 mi (8,161.54 km) |
