| Stony Brook to Orbetello | 4,159.82 mi (6,694.58 km) |
| Stony Brook to Oria | 4,512.79 mi (7,262.63 km) |
| Stony Brook to Oristano | 4,129.20 mi (6,645.30 km) |
| Stony Brook to Orta Nova | 4,397.39 mi (7,076.91 km) |
| Stony Brook to Orte | 4,210.80 mi (6,776.63 km) |
| Stony Brook to Ortona | 4,302.83 mi (6,924.73 km) |
| Stony Brook to Orvieto | 4,189.69 mi (6,742.66 km) |
| Stony Brook to Orzinuovi | 4,005.35 mi (6,445.99 km) |
| Stony Brook to Osimo | 4,222.76 mi (6,795.87 km) |
| Stony Brook to Ospitaletto | 4,006.36 mi (6,447.61 km) |
| Stony Brook to Ostuni | 4,501.67 mi (7,244.74 km) |
| Stony Brook to Ottaviano | 4,360.86 mi (7,018.12 km) |
| Stony Brook to Ovada | 3,974.06 mi (6,395.63 km) |
| Stony Brook to Ozieri | 4,124.58 mi (6,637.87 km) |
| Stony Brook to Paceco | 4,379.92 mi (7,048.80 km) |
