| Karlsdorf-Neuthard to Oestrich-Winkel | 64.45 mi (103.73 km) |
| Karlsdorf-Neuthard to Offenburg | 53.97 mi (86.86 km) |
| Karlsdorf-Neuthard to Oftersheim | 16.29 mi (26.21 km) |
| Karlsdorf-Neuthard to Ohrdruf | 152.04 mi (244.68 km) |
| Karlsdorf-Neuthard to Ohringen | 43.42 mi (69.87 km) |
| Karlsdorf-Neuthard to Olbernhau | 237.87 mi (382.81 km) |
| Karlsdorf-Neuthard to Olching | 142.09 mi (228.68 km) |
| Karlsdorf-Neuthard to Oldenburg | 277.26 mi (446.21 km) |
| Karlsdorf-Neuthard to Oldenburg in Holstein | 370.50 mi (596.27 km) |
| Karlsdorf-Neuthard to Olfen | 185.45 mi (298.45 km) |
| Karlsdorf-Neuthard to Olpe | 133.68 mi (215.14 km) |
| Karlsdorf-Neuthard to Olsberg | 152.97 mi (246.18 km) |
| Karlsdorf-Neuthard to Oranienburg | 322.70 mi (519.34 km) |
| Karlsdorf-Neuthard to Ortenberg | 87.29 mi (140.48 km) |
| Karlsdorf-Neuthard to Oschatz | 251.03 mi (403.99 km) |
