| Kasterlee to Oestrich-Winkel | 159.14 mi (256.11 km) |
| Kasterlee to Offenburg | 233.71 mi (376.12 km) |
| Kasterlee to Oftersheim | 206.32 mi (332.04 km) |
| Kasterlee to Ohrdruf | 252.85 mi (406.93 km) |
| Kasterlee to Ohringen | 245.93 mi (395.78 km) |
| Kasterlee to Olbernhau | 366.86 mi (590.41 km) |
| Kasterlee to Olching | 353.74 mi (569.29 km) |
| Kasterlee to Oldenburg | 190.31 mi (306.27 km) |
| Kasterlee to Oldenburg in Holstein | 325.25 mi (523.44 km) |
| Kasterlee to Olfen | 109.55 mi (176.30 km) |
| Kasterlee to Olpe | 126.04 mi (202.84 km) |
| Kasterlee to Olsberg | 152.78 mi (245.88 km) |
| Kasterlee to Oranienburg | 367.26 mi (591.04 km) |
| Kasterlee to Ortenberg | 189.58 mi (305.10 km) |
| Kasterlee to Oschatz | 352.42 mi (567.16 km) |
