| Zierikzee to Navodari | 1,241.49 mi (1,997.98 km) |
| Zierikzee to Negresti-Oas | 905.90 mi (1,457.91 km) |
| Zierikzee to Nehoiu | 1,107.80 mi (1,782.84 km) |
| Zierikzee to Ocna Mures | 970.11 mi (1,561.25 km) |
| Zierikzee to Odobesti | 1,125.16 mi (1,810.77 km) |
| Zierikzee to Odorheiu Secuiesc | 1,032.81 mi (1,662.15 km) |
| Zierikzee to Oltenita | 1,168.99 mi (1,881.31 km) |
| Zierikzee to Onesti | 1,096.25 mi (1,764.24 km) |
| Zierikzee to Oradea | 866.94 mi (1,395.20 km) |
| Zierikzee to Orastie | 961.76 mi (1,547.80 km) |
| Zierikzee to Oravita | 931.59 mi (1,499.25 km) |
| Zierikzee to Orsova | 972.54 mi (1,565.16 km) |
| Zierikzee to Otelu Rosu | 939.57 mi (1,512.09 km) |
| Zierikzee to Otopeni | 1,127.85 mi (1,815.09 km) |
| Zierikzee to Ovidiu | 1,241.19 mi (1,997.51 km) |
