| Defiance to Oerlinghausen | 4,167.66 mi (6,707.20 km) |
| Defiance to Oestrich-Winkel | 4,211.73 mi (6,778.12 km) |
| Defiance to Offenburg | 4,263.96 mi (6,862.19 km) |
| Defiance to Oftersheim | 4,256.59 mi (6,850.31 km) |
| Defiance to Ohrdruf | 4,284.57 mi (6,895.35 km) |
| Defiance to Ohringen | 4,297.87 mi (6,916.75 km) |
| Defiance to Olbernhau | 4,386.12 mi (7,058.78 km) |
| Defiance to Olching | 4,404.92 mi (7,089.04 km) |
| Defiance to Oldenburg | 4,110.71 mi (6,615.54 km) |
| Defiance to Oldenburg in Holstein | 4,165.41 mi (6,703.58 km) |
| Defiance to Olfen | 4,128.80 mi (6,644.66 km) |
| Defiance to Olpe | 4,169.74 mi (6,710.56 km) |
| Defiance to Olsberg | 4,182.41 mi (6,730.94 km) |
| Defiance to Oranienburg | 4,303.70 mi (6,926.13 km) |
| Defiance to Ortenberg | 4,239.06 mi (6,822.11 km) |
