| Severn to Oerlinghausen | 3,980.03 mi (6,405.24 km) |
| Severn to Oestrich-Winkel | 4,008.97 mi (6,451.81 km) |
| Severn to Offenburg | 4,050.73 mi (6,519.03 km) |
| Severn to Oftersheim | 4,050.92 mi (6,519.33 km) |
| Severn to Ohrdruf | 4,093.79 mi (6,588.33 km) |
| Severn to Ohringen | 4,093.24 mi (6,587.43 km) |
| Severn to Olbernhau | 4,200.54 mi (6,760.11 km) |
| Severn to Olching | 4,198.22 mi (6,756.38 km) |
| Severn to Oldenburg | 3,930.49 mi (6,325.51 km) |
| Severn to Oldenburg in Holstein | 3,999.22 mi (6,436.13 km) |
| Severn to Olfen | 3,936.59 mi (6,335.33 km) |
| Severn to Olpe | 3,973.61 mi (6,394.91 km) |
| Severn to Olsberg | 3,990.05 mi (6,421.37 km) |
| Severn to Oranienburg | 4,131.94 mi (6,649.72 km) |
| Severn to Ortenberg | 4,041.16 mi (6,503.61 km) |
