| Wetzlar to Oerlinghausen | 97.00 mi (156.10 km) |
| Wetzlar to Oestrich-Winkel | 44.95 mi (72.34 km) |
| Wetzlar to Offenburg | 147.30 mi (237.06 km) |
| Wetzlar to Oftersheim | 82.73 mi (133.14 km) |
| Wetzlar to Ohrdruf | 99.37 mi (159.92 km) |
| Wetzlar to Ohringen | 104.40 mi (168.01 km) |
| Wetzlar to Olbernhau | 211.97 mi (341.13 km) |
| Wetzlar to Olching | 206.83 mi (332.86 km) |
| Wetzlar to Oldenburg | 178.48 mi (287.24 km) |
| Wetzlar to Oldenburg in Holstein | 276.75 mi (445.39 km) |
| Wetzlar to Olfen | 93.04 mi (149.73 km) |
| Wetzlar to Olpe | 42.60 mi (68.56 km) |
| Wetzlar to Olsberg | 54.13 mi (87.11 km) |
| Wetzlar to Oranienburg | 253.03 mi (407.21 km) |
| Wetzlar to Ortenberg | 28.44 mi (45.77 km) |
