| Knowle to Oerlinghausen | 441.16 mi (709.97 km) |
| Knowle to Oestrich-Winkel | 452.09 mi (727.57 km) |
| Knowle to Offenburg | 503.74 mi (810.70 km) |
| Knowle to Oftersheim | 495.13 mi (796.83 km) |
| Knowle to Ohrdruf | 544.87 mi (876.89 km) |
| Knowle to Ohringen | 536.98 mi (864.19 km) |
| Knowle to Olbernhau | 657.15 mi (1,057.58 km) |
| Knowle to Olching | 643.29 mi (1,035.28 km) |
| Knowle to Oldenburg | 418.71 mi (673.85 km) |
| Knowle to Oldenburg in Holstein | 536.06 mi (862.71 km) |
| Knowle to Olfen | 389.79 mi (627.30 km) |
| Knowle to Olpe | 420.06 mi (676.02 km) |
| Knowle to Olsberg | 441.28 mi (710.17 km) |
| Knowle to Oranienburg | 627.96 mi (1,010.60 km) |
| Knowle to Ortenberg | 485.47 mi (781.28 km) |
