| Nedre Eiker to Oerlinghausen | 541.36 mi (871.23 km) |
| Nedre Eiker to Oestrich-Winkel | 679.42 mi (1,093.41 km) |
| Nedre Eiker to Offenburg | 785.13 mi (1,263.55 km) |
| Nedre Eiker to Oftersheim | 720.46 mi (1,159.47 km) |
| Nedre Eiker to Ohrdruf | 618.06 mi (994.68 km) |
| Nedre Eiker to Ohringen | 730.26 mi (1,175.24 km) |
| Nedre Eiker to Olbernhau | 641.73 mi (1,032.76 km) |
| Nedre Eiker to Olching | 800.70 mi (1,288.61 km) |
| Nedre Eiker to Oldenburg | 462.65 mi (744.57 km) |
| Nedre Eiker to Oldenburg in Holstein | 378.92 mi (609.81 km) |
| Nedre Eiker to Olfen | 565.42 mi (909.95 km) |
| Nedre Eiker to Olpe | 610.48 mi (982.47 km) |
| Nedre Eiker to Olsberg | 584.50 mi (940.67 km) |
| Nedre Eiker to Oranienburg | 499.58 mi (803.99 km) |
| Nedre Eiker to Ortenberg | 651.22 mi (1,048.04 km) |
