| Ercis to Oerlinghausen | 1,878.33 mi (3,022.88 km) |
| Ercis to Oestrich-Winkel | 1,877.54 mi (3,021.61 km) |
| Ercis to Offenburg | 1,864.60 mi (3,000.78 km) |
| Ercis to Oftersheim | 1,844.36 mi (2,968.22 km) |
| Ercis to Ohrdruf | 1,772.29 mi (2,852.22 km) |
| Ercis to Ohringen | 1,801.71 mi (2,899.57 km) |
| Ercis to Olbernhau | 1,659.92 mi (2,671.38 km) |
| Ercis to Olching | 1,708.18 mi (2,749.06 km) |
| Ercis to Oldenburg | 1,918.31 mi (3,087.22 km) |
| Ercis to Oldenburg in Holstein | 1,840.92 mi (2,962.67 km) |
| Ercis to Olfen | 1,927.48 mi (3,101.98 km) |
| Ercis to Olpe | 1,898.18 mi (3,054.83 km) |
| Ercis to Olsberg | 1,875.72 mi (3,018.67 km) |
| Ercis to Oranienburg | 1,711.79 mi (2,754.86 km) |
| Ercis to Ortenberg | 1,836.41 mi (2,955.42 km) |
