| Sulphur Springs to Orbetello | 5,461.34 mi (8,789.18 km) |
| Sulphur Springs to Oria | 5,806.83 mi (9,345.19 km) |
| Sulphur Springs to Oristano | 5,449.01 mi (8,769.33 km) |
| Sulphur Springs to Orta Nova | 5,692.64 mi (9,161.41 km) |
| Sulphur Springs to Orte | 5,509.13 mi (8,866.09 km) |
| Sulphur Springs to Ortona | 5,596.18 mi (9,006.17 km) |
| Sulphur Springs to Orvieto | 5,487.32 mi (8,830.98 km) |
| Sulphur Springs to Orzinuovi | 5,292.70 mi (8,517.77 km) |
| Sulphur Springs to Osimo | 5,512.10 mi (8,870.87 km) |
| Sulphur Springs to Ospitaletto | 5,292.32 mi (8,517.16 km) |
| Sulphur Springs to Ostuni | 5,794.59 mi (9,325.49 km) |
| Sulphur Springs to Ottaviano | 5,662.18 mi (9,112.40 km) |
| Sulphur Springs to Ovada | 5,269.52 mi (8,480.47 km) |
| Sulphur Springs to Ozieri | 5,440.56 mi (8,755.73 km) |
| Sulphur Springs to Paceco | 5,699.30 mi (9,172.14 km) |
