| Ermelo to Oerlinghausen | 131.38 mi (211.43 km) |
| Ermelo to Oestrich-Winkel | 189.51 mi (304.99 km) |
| Ermelo to Offenburg | 283.80 mi (456.73 km) |
| Ermelo to Oftersheim | 240.24 mi (386.64 km) |
| Ermelo to Ohrdruf | 242.06 mi (389.56 km) |
| Ermelo to Ohringen | 273.22 mi (439.71 km) |
| Ermelo to Olbernhau | 350.47 mi (564.03 km) |
| Ermelo to Olching | 378.80 mi (609.63 km) |
| Ermelo to Oldenburg | 123.33 mi (198.48 km) |
| Ermelo to Oldenburg in Holstein | 257.56 mi (414.50 km) |
| Ermelo to Olfen | 85.26 mi (137.21 km) |
| Ermelo to Olpe | 129.94 mi (209.13 km) |
| Ermelo to Olsberg | 138.89 mi (223.52 km) |
| Ermelo to Oranienburg | 321.70 mi (517.72 km) |
| Ermelo to Ortenberg | 200.17 mi (322.14 km) |
