| Annapolis Neck to Orbetello | 4,383.68 mi (7,054.85 km) |
| Annapolis Neck to Oria | 4,736.88 mi (7,623.27 km) |
| Annapolis Neck to Oristano | 4,351.66 mi (7,003.31 km) |
| Annapolis Neck to Orta Nova | 4,621.45 mi (7,437.51 km) |
| Annapolis Neck to Orte | 4,434.79 mi (7,137.11 km) |
| Annapolis Neck to Ortona | 4,526.97 mi (7,285.46 km) |
| Annapolis Neck to Orvieto | 4,413.71 mi (7,103.18 km) |
| Annapolis Neck to Orzinuovi | 4,229.66 mi (6,806.98 km) |
| Annapolis Neck to Osimo | 4,447.01 mi (7,156.77 km) |
| Annapolis Neck to Ospitaletto | 4,230.69 mi (6,808.63 km) |
| Annapolis Neck to Ostuni | 4,725.80 mi (7,605.43 km) |
| Annapolis Neck to Ottaviano | 4,584.69 mi (7,378.34 km) |
| Annapolis Neck to Ovada | 4,198.19 mi (6,756.33 km) |
| Annapolis Neck to Ozieri | 4,347.45 mi (6,996.54 km) |
| Annapolis Neck to Paceco | 4,602.35 mi (7,406.76 km) |
