| Chesapeake to Orbetello | 4,464.29 mi (7,184.58 km) |
| Chesapeake to Oria | 4,819.47 mi (7,756.18 km) |
| Chesapeake to Oristano | 4,423.83 mi (7,119.47 km) |
| Chesapeake to Orta Nova | 4,703.89 mi (7,570.17 km) |
| Chesapeake to Orte | 4,516.54 mi (7,268.66 km) |
| Chesapeake to Ortona | 4,610.36 mi (7,419.65 km) |
| Chesapeake to Orvieto | 4,495.78 mi (7,235.26 km) |
| Chesapeake to Orzinuovi | 4,315.98 mi (6,945.90 km) |
| Chesapeake to Osimo | 4,532.04 mi (7,293.61 km) |
| Chesapeake to Ospitaletto | 4,317.48 mi (6,948.31 km) |
| Chesapeake to Ostuni | 4,808.82 mi (7,739.05 km) |
| Chesapeake to Ottaviano | 4,664.86 mi (7,507.37 km) |
| Chesapeake to Ovada | 4,281.67 mi (6,890.69 km) |
| Chesapeake to Ozieri | 4,421.65 mi (7,115.95 km) |
| Chesapeake to Paceco | 4,674.14 mi (7,522.31 km) |
