| Weener to Oerlinghausen | 99.65 mi (160.37 km) |
| Weener to Oestrich-Winkel | 220.70 mi (355.19 km) |
| Weener to Offenburg | 325.88 mi (524.46 km) |
| Weener to Oftersheim | 267.76 mi (430.92 km) |
| Weener to Ohrdruf | 216.27 mi (348.06 km) |
| Weener to Ohringen | 289.50 mi (465.90 km) |
| Weener to Olbernhau | 307.70 mi (495.19 km) |
| Weener to Olching | 384.48 mi (618.77 km) |
| Weener to Oldenburg | 35.57 mi (57.24 km) |
| Weener to Oldenburg in Holstein | 163.93 mi (263.82 km) |
| Weener to Olfen | 100.36 mi (161.52 km) |
| Weener to Olpe | 150.09 mi (241.55 km) |
| Weener to Olsberg | 134.42 mi (216.33 km) |
| Weener to Oranienburg | 246.34 mi (396.44 km) |
| Weener to Ortenberg | 207.50 mi (333.95 km) |
