| Cities | Distance |
|---|---|
| Kocaeli to Nasaud | 526.89 mi (847.95 km) |
| Kocaeli to Navodari | 254.67 mi (409.85 km) |
| Kocaeli to Negresti-Oas | 586.17 mi (943.35 km) |
| Kocaeli to Nehoiu | 365.78 mi (588.66 km) |
| Kocaeli to Ocna Mures | 492.75 mi (793.01 km) |
| Kocaeli to Odobesti | 374.26 mi (602.31 km) |
| Kocaeli to Odorheiu Secuiesc | 447.66 mi (720.44 km) |
| Kocaeli to Oltenita | 284.11 mi (457.24 km) |
| Kocaeli to Onesti | 411.12 mi (661.63 km) |
| Kocaeli to Oradea | 589.68 mi (949.00 km) |
| Kocaeli to Orastie | 487.13 mi (783.97 km) |
| Kocaeli to Oravita | 510.42 mi (821.45 km) |
| Kocaeli to Orsova | 469.38 mi (755.40 km) |
| Kocaeli to Otelu Rosu | 503.03 mi (809.54 km) |
| Kocaeli to Otopeni | 326.57 mi (525.56 km) |