| Welver to Oerlinghausen | 38.75 mi (62.36 km) |
| Welver to Oestrich-Winkel | 111.72 mi (179.79 km) |
| Welver to Offenburg | 217.65 mi (350.27 km) |
| Welver to Oftersheim | 157.61 mi (253.65 km) |
| Welver to Ohrdruf | 131.84 mi (212.17 km) |
| Welver to Ohringen | 180.24 mi (290.07 km) |
| Welver to Olbernhau | 242.01 mi (389.47 km) |
| Welver to Olching | 279.33 mi (449.53 km) |
| Welver to Oldenburg | 106.07 mi (170.70 km) |
| Welver to Oldenburg in Holstein | 221.75 mi (356.88 km) |
| Welver to Olfen | 25.59 mi (41.19 km) |
| Welver to Olpe | 41.81 mi (67.28 km) |
| Welver to Olsberg | 29.15 mi (46.92 km) |
| Welver to Oranienburg | 236.96 mi (381.35 km) |
| Welver to Ortenberg | 99.33 mi (159.85 km) |
