| Harborne to Oerlinghausen | 450.34 mi (724.75 km) |
| Harborne to Oestrich-Winkel | 462.36 mi (744.09 km) |
| Harborne to Offenburg | 514.19 mi (827.51 km) |
| Harborne to Oftersheim | 505.49 mi (813.50 km) |
| Harborne to Ohrdruf | 554.57 mi (892.50 km) |
| Harborne to Ohringen | 547.31 mi (880.82 km) |
| Harborne to Olbernhau | 666.71 mi (1,072.96 km) |
| Harborne to Olching | 653.67 mi (1,051.98 km) |
| Harborne to Oldenburg | 426.82 mi (686.90 km) |
| Harborne to Oldenburg in Holstein | 543.15 mi (874.11 km) |
| Harborne to Olfen | 399.26 mi (642.55 km) |
| Harborne to Olpe | 429.94 mi (691.92 km) |
| Harborne to Olsberg | 450.90 mi (725.66 km) |
| Harborne to Oranienburg | 636.36 mi (1,024.13 km) |
| Harborne to Ortenberg | 495.52 mi (797.46 km) |
