| Ermont to Oestrich-Winkel | 266.74 mi (429.28 km) |
| Ermont to Offenburg | 261.02 mi (420.07 km) |
| Ermont to Oftersheim | 286.74 mi (461.47 km) |
| Ermont to Ohrdruf | 397.48 mi (639.69 km) |
| Ermont to Ohringen | 327.73 mi (527.42 km) |
| Ermont to Olbernhau | 506.37 mi (814.93 km) |
| Ermont to Olching | 417.19 mi (671.40 km) |
| Ermont to Oldenburg | 385.88 mi (621.02 km) |
| Ermont to Oldenburg in Holstein | 520.04 mi (836.93 km) |
| Ermont to Olfen | 293.89 mi (472.96 km) |
| Ermont to Olpe | 284.17 mi (457.33 km) |
| Ermont to Olsberg | 319.81 mi (514.69 km) |
| Ermont to Oranienburg | 543.82 mi (875.19 km) |
| Ermont to Ortenberg | 317.96 mi (511.71 km) |
| Ermont to Oschatz | 505.49 mi (813.51 km) |
