| River Edge to Oerlinghausen | 3,792.79 mi (6,103.91 km) |
| River Edge to Oestrich-Winkel | 3,821.74 mi (6,150.49 km) |
| River Edge to Offenburg | 3,863.70 mi (6,218.03 km) |
| River Edge to Oftersheim | 3,863.73 mi (6,218.08 km) |
| River Edge to Ohrdruf | 3,906.53 mi (6,286.95 km) |
| River Edge to Ohringen | 3,906.04 mi (6,286.16 km) |
| River Edge to Olbernhau | 4,013.31 mi (6,458.79 km) |
| River Edge to Olching | 4,011.06 mi (6,455.18 km) |
| River Edge to Oldenburg | 3,743.37 mi (6,024.37 km) |
| River Edge to Oldenburg in Holstein | 3,812.49 mi (6,135.61 km) |
| River Edge to Olfen | 3,749.33 mi (6,033.96 km) |
| River Edge to Olpe | 3,786.34 mi (6,093.53 km) |
| River Edge to Olsberg | 3,802.78 mi (6,119.99 km) |
| River Edge to Oranienburg | 3,945.00 mi (6,348.86 km) |
| River Edge to Ortenberg | 3,853.89 mi (6,202.24 km) |
