| Blackburn to Oerlinghausen | 480.55 mi (773.38 km) |
| Blackburn to Oestrich-Winkel | 515.97 mi (830.38 km) |
| Blackburn to Offenburg | 579.78 mi (933.07 km) |
| Blackburn to Oftersheim | 562.49 mi (905.24 km) |
| Blackburn to Ohrdruf | 592.76 mi (953.95 km) |
| Blackburn to Ohringen | 602.71 mi (969.96 km) |
| Blackburn to Olbernhau | 700.93 mi (1,128.04 km) |
| Blackburn to Olching | 710.43 mi (1,143.33 km) |
| Blackburn to Oldenburg | 441.69 mi (710.84 km) |
| Blackburn to Oldenburg in Holstein | 543.00 mi (873.87 km) |
| Blackburn to Olfen | 435.53 mi (700.91 km) |
| Blackburn to Olpe | 473.64 mi (762.24 km) |
| Blackburn to Olsberg | 488.98 mi (786.93 km) |
| Blackburn to Oranienburg | 652.07 mi (1,049.40 km) |
| Blackburn to Ortenberg | 542.51 mi (873.08 km) |
