| Fredericksburg to Orbetello | 4,452.76 mi (7,166.02 km) |
| Fredericksburg to Oria | 4,806.05 mi (7,734.58 km) |
| Fredericksburg to Oristano | 4,420.23 mi (7,113.67 km) |
| Fredericksburg to Orta Nova | 4,690.61 mi (7,548.81 km) |
| Fredericksburg to Orte | 4,503.92 mi (7,248.36 km) |
| Fredericksburg to Ortona | 4,596.16 mi (7,396.81 km) |
| Fredericksburg to Orvieto | 4,482.85 mi (7,214.45 km) |
| Fredericksburg to Orzinuovi | 4,298.93 mi (6,918.45 km) |
| Fredericksburg to Osimo | 4,516.25 mi (7,268.20 km) |
| Fredericksburg to Ospitaletto | 4,299.96 mi (6,920.12 km) |
| Fredericksburg to Ostuni | 4,794.98 mi (7,716.77 km) |
| Fredericksburg to Ottaviano | 4,653.75 mi (7,489.49 km) |
| Fredericksburg to Ovada | 4,267.37 mi (6,867.68 km) |
| Fredericksburg to Ozieri | 4,416.17 mi (7,107.13 km) |
| Fredericksburg to Paceco | 4,670.91 mi (7,517.10 km) |
