| Merchtem to Oestrich-Winkel | 178.54 mi (287.33 km) |
| Merchtem to Offenburg | 239.02 mi (384.66 km) |
| Merchtem to Oftersheim | 221.87 mi (357.06 km) |
| Merchtem to Ohrdruf | 283.30 mi (455.93 km) |
| Merchtem to Ohringen | 263.40 mi (423.90 km) |
| Merchtem to Olbernhau | 397.53 mi (639.77 km) |
| Merchtem to Olching | 370.21 mi (595.79 km) |
| Merchtem to Oldenburg | 226.28 mi (364.16 km) |
| Merchtem to Oldenburg in Holstein | 361.41 mi (581.63 km) |
| Merchtem to Olfen | 145.48 mi (234.13 km) |
| Merchtem to Olpe | 156.59 mi (252.00 km) |
| Merchtem to Olsberg | 186.03 mi (299.39 km) |
| Merchtem to Oranienburg | 403.24 mi (648.94 km) |
| Merchtem to Ortenberg | 215.33 mi (346.54 km) |
| Merchtem to Oschatz | 385.20 mi (619.91 km) |
