| Westerlo to Oestrich-Winkel | 154.68 mi (248.94 km) |
| Westerlo to Offenburg | 225.35 mi (362.67 km) |
| Westerlo to Oftersheim | 200.69 mi (322.97 km) |
| Westerlo to Ohrdruf | 253.68 mi (408.26 km) |
| Westerlo to Ohringen | 241.02 mi (387.88 km) |
| Westerlo to Olbernhau | 367.88 mi (592.04 km) |
| Westerlo to Olching | 348.63 mi (561.07 km) |
| Westerlo to Oldenburg | 199.57 mi (321.17 km) |
| Westerlo to Oldenburg in Holstein | 334.21 mi (537.85 km) |
| Westerlo to Olfen | 114.97 mi (185.03 km) |
| Westerlo to Olpe | 126.76 mi (204.00 km) |
| Westerlo to Olsberg | 155.44 mi (250.15 km) |
| Westerlo to Oranienburg | 372.64 mi (599.70 km) |
| Westerlo to Ortenberg | 187.86 mi (302.33 km) |
| Westerlo to Oschatz | 354.80 mi (570.99 km) |
