| Summit to Oerlinghausen | 3,815.24 mi (6,140.04 km) |
| Summit to Oestrich-Winkel | 3,844.18 mi (6,186.61 km) |
| Summit to Offenburg | 3,886.12 mi (6,254.11 km) |
| Summit to Oftersheim | 3,886.17 mi (6,254.19 km) |
| Summit to Ohrdruf | 3,928.98 mi (6,323.09 km) |
| Summit to Ohringen | 3,928.48 mi (6,322.28 km) |
| Summit to Olbernhau | 4,035.75 mi (6,494.92 km) |
| Summit to Olching | 4,033.50 mi (6,491.29 km) |
| Summit to Oldenburg | 3,765.80 mi (6,060.47 km) |
| Summit to Oldenburg in Holstein | 3,834.87 mi (6,171.63 km) |
| Summit to Olfen | 3,771.78 mi (6,070.09 km) |
| Summit to Olpe | 3,808.79 mi (6,129.66 km) |
| Summit to Olsberg | 3,825.24 mi (6,156.12 km) |
| Summit to Oranienburg | 3,967.41 mi (6,384.93 km) |
| Summit to Ortenberg | 3,876.34 mi (6,238.37 km) |
