| Stamford to Orbetello | 889.75 mi (1,431.92 km) |
| Stamford to Oria | 1,196.00 mi (1,924.77 km) |
| Stamford to Oristano | 979.98 mi (1,577.13 km) |
| Stamford to Orta Nova | 1,088.26 mi (1,751.39 km) |
| Stamford to Orte | 922.59 mi (1,484.77 km) |
| Stamford to Ortona | 991.09 mi (1,595.01 km) |
| Stamford to Orvieto | 899.93 mi (1,448.29 km) |
| Stamford to Orzinuovi | 687.20 mi (1,105.94 km) |
| Stamford to Osimo | 901.21 mi (1,450.37 km) |
| Stamford to Ospitaletto | 683.31 mi (1,099.68 km) |
| Stamford to Ostuni | 1,181.90 mi (1,902.08 km) |
| Stamford to Ottaviano | 1,075.97 mi (1,731.60 km) |
| Stamford to Ovada | 692.06 mi (1,113.76 km) |
| Stamford to Ozieri | 945.93 mi (1,522.33 km) |
| Stamford to Paceco | 1,191.18 mi (1,917.02 km) |
