| Wadern to Oerlinghausen | 186.66 mi (300.41 km) |
| Wadern to Oestrich-Winkel | 60.61 mi (97.55 km) |
| Wadern to Offenburg | 87.18 mi (140.31 km) |
| Wadern to Oftersheim | 77.84 mi (125.26 km) |
| Wadern to Ohrdruf | 193.56 mi (311.51 km) |
| Wadern to Ohringen | 120.50 mi (193.93 km) |
| Wadern to Olbernhau | 297.35 mi (478.53 km) |
| Wadern to Olching | 221.76 mi (356.88 km) |
| Wadern to Oldenburg | 257.26 mi (414.02 km) |
| Wadern to Oldenburg in Holstein | 372.06 mi (598.78 km) |
| Wadern to Olfen | 153.68 mi (247.33 km) |
| Wadern to Olpe | 112.09 mi (180.38 km) |
| Wadern to Olsberg | 145.27 mi (233.80 km) |
| Wadern to Oranienburg | 355.18 mi (571.61 km) |
| Wadern to Ortenberg | 113.28 mi (182.31 km) |
