| Mettlach to Oestrich-Winkel | 71.80 mi (115.56 km) |
| Mettlach to Offenburg | 93.20 mi (149.99 km) |
| Mettlach to Oftersheim | 89.70 mi (144.35 km) |
| Mettlach to Ohrdruf | 204.99 mi (329.90 km) |
| Mettlach to Ohringen | 132.20 mi (212.76 km) |
| Mettlach to Olbernhau | 309.39 mi (497.91 km) |
| Mettlach to Olching | 232.36 mi (373.95 km) |
| Mettlach to Oldenburg | 261.80 mi (421.33 km) |
| Mettlach to Oldenburg in Holstein | 379.00 mi (609.94 km) |
| Mettlach to Olfen | 157.55 mi (253.55 km) |
| Mettlach to Olpe | 118.67 mi (190.99 km) |
| Mettlach to Olsberg | 152.89 mi (246.06 km) |
| Mettlach to Oranienburg | 365.44 mi (588.12 km) |
| Mettlach to Ortenberg | 124.57 mi (200.48 km) |
| Mettlach to Oschatz | 312.64 mi (503.15 km) |
