| Biga to Oerlinghausen | 1,197.71 mi (1,927.53 km) |
| Biga to Oestrich-Winkel | 1,150.38 mi (1,851.36 km) |
| Biga to Offenburg | 1,106.32 mi (1,780.44 km) |
| Biga to Oftersheim | 1,106.81 mi (1,781.24 km) |
| Biga to Ohrdruf | 1,079.46 mi (1,737.22 km) |
| Biga to Ohringen | 1,064.90 mi (1,713.80 km) |
| Biga to Olbernhau | 984.10 mi (1,583.75 km) |
| Biga to Olching | 958.94 mi (1,543.26 km) |
| Biga to Oldenburg | 1,261.24 mi (2,029.76 km) |
| Biga to Oldenburg in Holstein | 1,232.12 mi (1,982.90 km) |
| Biga to Olfen | 1,233.67 mi (1,985.39 km) |
| Biga to Olpe | 1,191.73 mi (1,917.91 km) |
| Biga to Olsberg | 1,180.20 mi (1,899.34 km) |
| Biga to Oranienburg | 1,088.14 mi (1,751.20 km) |
| Biga to Ortenberg | 1,122.29 mi (1,806.15 km) |
