| Cities | Distance |
|---|---|
| Constanta to Orbetello | 882.34 mi (1,419.99 km) |
| Constanta to Oria | 615.66 mi (990.80 km) |
| Constanta to Oristano | 1,066.73 mi (1,716.73 km) |
| Constanta to Orta Nova | 683.44 mi (1,099.89 km) |
| Constanta to Orte | 823.87 mi (1,325.89 km) |
| Constanta to Ortona | 726.15 mi (1,168.63 km) |
| Constanta to Orvieto | 833.48 mi (1,341.36 km) |
| Constanta to Orzinuovi | 918.92 mi (1,478.86 km) |
| Constanta to Osimo | 755.60 mi (1,216.02 km) |
| Constanta to Ospitaletto | 911.96 mi (1,467.65 km) |
| Constanta to Ostuni | 610.62 mi (982.69 km) |
| Constanta to Ottaviano | 755.42 mi (1,215.73 km) |
| Constanta to Ovada | 984.68 mi (1,584.68 km) |
| Constanta to Ozieri | 1,029.34 mi (1,656.56 km) |
| Constanta to Paceco | 938.12 mi (1,509.75 km) |