| Colleferro to Navodari | 806.46 mi (1,297.88 km) |
| Colleferro to Negresti-Oas | 662.37 mi (1,065.99 km) |
| Colleferro to Nehoiu | 709.91 mi (1,142.49 km) |
| Colleferro to Ocna Mures | 626.37 mi (1,008.04 km) |
| Colleferro to Odobesti | 753.30 mi (1,212.32 km) |
| Colleferro to Odorheiu Secuiesc | 686.47 mi (1,104.76 km) |
| Colleferro to Oltenita | 707.27 mi (1,138.23 km) |
| Colleferro to Onesti | 750.35 mi (1,207.56 km) |
| Colleferro to Oradea | 573.19 mi (922.46 km) |
| Colleferro to Orastie | 581.48 mi (935.81 km) |
| Colleferro to Oravita | 491.23 mi (790.56 km) |
| Colleferro to Orsova | 515.05 mi (828.89 km) |
| Colleferro to Otelu Rosu | 534.70 mi (860.52 km) |
| Colleferro to Otopeni | 685.38 mi (1,103.02 km) |
| Colleferro to Ovidiu | 803.40 mi (1,292.95 km) |
