| Grottaglie to Navodari | 626.67 mi (1,008.53 km) |
| Grottaglie to Negresti-Oas | 586.92 mi (944.56 km) |
| Grottaglie to Nehoiu | 558.24 mi (898.40 km) |
| Grottaglie to Ocna Mures | 516.95 mi (831.96 km) |
| Grottaglie to Odobesti | 604.73 mi (973.22 km) |
| Grottaglie to Odorheiu Secuiesc | 561.09 mi (902.99 km) |
| Grottaglie to Oltenita | 530.05 mi (853.03 km) |
| Grottaglie to Onesti | 612.59 mi (985.87 km) |
| Grottaglie to Oradea | 503.97 mi (811.06 km) |
| Grottaglie to Orastie | 468.05 mi (753.26 km) |
| Grottaglie to Oravita | 378.63 mi (609.35 km) |
| Grottaglie to Orsova | 383.95 mi (617.91 km) |
| Grottaglie to Otelu Rosu | 424.54 mi (683.23 km) |
| Grottaglie to Otopeni | 519.50 mi (836.06 km) |
| Grottaglie to Ovidiu | 622.96 mi (1,002.55 km) |
