| Arlington to Orbetello | 5,545.45 mi (8,924.53 km) |
| Arlington to Oria | 5,889.94 mi (9,478.94 km) |
| Arlington to Oristano | 5,535.22 mi (8,908.08 km) |
| Arlington to Orta Nova | 5,775.94 mi (9,295.47 km) |
| Arlington to Orte | 5,592.87 mi (9,000.85 km) |
| Arlington to Ortona | 5,679.33 mi (9,140.00 km) |
| Arlington to Orvieto | 5,570.99 mi (8,965.64 km) |
| Arlington to Orzinuovi | 5,375.42 mi (8,650.90 km) |
| Arlington to Osimo | 5,594.89 mi (9,004.11 km) |
| Arlington to Ospitaletto | 5,374.90 mi (8,650.07 km) |
| Arlington to Ostuni | 5,877.58 mi (9,459.06 km) |
| Arlington to Ottaviano | 5,746.16 mi (9,247.55 km) |
| Arlington to Ovada | 5,353.08 mi (8,614.96 km) |
| Arlington to Ozieri | 5,526.31 mi (8,893.74 km) |
| Arlington to Paceco | 5,785.37 mi (9,310.66 km) |
