| Wolf Trap to Orbetello | 4,418.42 mi (7,110.76 km) |
| Wolf Trap to Oria | 4,771.21 mi (7,678.52 km) |
| Wolf Trap to Oristano | 4,387.81 mi (7,061.50 km) |
| Wolf Trap to Orta Nova | 4,655.83 mi (7,492.84 km) |
| Wolf Trap to Orte | 4,469.33 mi (7,192.68 km) |
| Wolf Trap to Ortona | 4,561.19 mi (7,340.52 km) |
| Wolf Trap to Orvieto | 4,448.19 mi (7,158.67 km) |
| Wolf Trap to Orzinuovi | 4,263.36 mi (6,861.22 km) |
| Wolf Trap to Osimo | 4,480.93 mi (7,211.35 km) |
| Wolf Trap to Ospitaletto | 4,264.30 mi (6,862.72 km) |
| Wolf Trap to Ostuni | 4,760.05 mi (7,660.56 km) |
| Wolf Trap to Ottaviano | 4,619.48 mi (7,434.34 km) |
| Wolf Trap to Ovada | 4,232.44 mi (6,811.45 km) |
| Wolf Trap to Ozieri | 4,383.28 mi (7,054.22 km) |
| Wolf Trap to Paceco | 4,638.53 mi (7,464.99 km) |
