| Brunswick to Oerlinghausen | 4,074.99 mi (6,558.06 km) |
| Brunswick to Oestrich-Winkel | 4,115.49 mi (6,623.23 km) |
| Brunswick to Offenburg | 4,165.31 mi (6,703.43 km) |
| Brunswick to Oftersheim | 4,159.70 mi (6,694.40 km) |
| Brunswick to Ohrdruf | 4,191.28 mi (6,745.21 km) |
| Brunswick to Ohringen | 4,201.28 mi (6,761.30 km) |
| Brunswick to Olbernhau | 4,294.20 mi (6,910.85 km) |
| Brunswick to Olching | 4,307.96 mi (6,932.99 km) |
| Brunswick to Oldenburg | 4,019.77 mi (6,469.19 km) |
| Brunswick to Oldenburg in Holstein | 4,078.00 mi (6,562.90 km) |
| Brunswick to Olfen | 4,034.98 mi (6,493.67 km) |
| Brunswick to Olpe | 4,075.03 mi (6,558.13 km) |
| Brunswick to Olsberg | 4,088.62 mi (6,579.99 km) |
| Brunswick to Oranienburg | 4,215.08 mi (6,783.51 km) |
| Brunswick to Ortenberg | 4,144.01 mi (6,669.13 km) |
