| Sint-Martens-Lennik to Oestrich-Winkel | 178.32 mi (286.97 km) |
| Sint-Martens-Lennik to Offenburg | 233.73 mi (376.14 km) |
| Sint-Martens-Lennik to Oftersheim | 219.97 mi (354.00 km) |
| Sint-Martens-Lennik to Ohrdruf | 287.29 mi (462.35 km) |
| Sint-Martens-Lennik to Ohringen | 261.98 mi (421.62 km) |
| Sint-Martens-Lennik to Olbernhau | 401.44 mi (646.06 km) |
| Sint-Martens-Lennik to Olching | 368.13 mi (592.45 km) |
| Sint-Martens-Lennik to Oldenburg | 236.89 mi (381.24 km) |
| Sint-Martens-Lennik to Oldenburg in Holstein | 371.88 mi (598.49 km) |
| Sint-Martens-Lennik to Olfen | 153.47 mi (246.98 km) |
| Sint-Martens-Lennik to Olpe | 161.15 mi (259.35 km) |
| Sint-Martens-Lennik to Olsberg | 191.88 mi (308.81 km) |
| Sint-Martens-Lennik to Oranienburg | 410.92 mi (661.31 km) |
| Sint-Martens-Lennik to Ortenberg | 217.36 mi (349.81 km) |
| Sint-Martens-Lennik to Oschatz | 390.34 mi (628.19 km) |
