| Siloam Springs to Orbetello | 5,272.08 mi (8,484.59 km) |
| Siloam Springs to Oria | 5,614.81 mi (9,036.17 km) |
| Siloam Springs to Oristano | 5,266.37 mi (8,475.40 km) |
| Siloam Springs to Orta Nova | 5,501.14 mi (8,853.24 km) |
| Siloam Springs to Orte | 5,318.83 mi (8,559.83 km) |
| Siloam Springs to Ortona | 5,404.33 mi (8,697.42 km) |
| Siloam Springs to Orvieto | 5,296.85 mi (8,524.46 km) |
| Siloam Springs to Orzinuovi | 5,099.83 mi (8,207.38 km) |
| Siloam Springs to Osimo | 5,319.35 mi (8,560.66 km) |
| Siloam Springs to Ospitaletto | 5,099.11 mi (8,206.22 km) |
| Siloam Springs to Ostuni | 5,602.29 mi (9,016.01 km) |
| Siloam Springs to Ottaviano | 5,472.51 mi (8,807.15 km) |
| Siloam Springs to Ovada | 5,078.83 mi (8,173.58 km) |
| Siloam Springs to Ozieri | 5,256.34 mi (8,459.27 km) |
| Siloam Springs to Paceco | 5,516.08 mi (8,877.27 km) |
