| Boucau to Oestrich-Winkel | 632.98 mi (1,018.68 km) |
| Boucau to Offenburg | 565.97 mi (910.85 km) |
| Boucau to Oftersheim | 626.04 mi (1,007.51 km) |
| Boucau to Ohrdruf | 762.50 mi (1,227.12 km) |
| Boucau to Ohringen | 653.34 mi (1,051.44 km) |
| Boucau to Olbernhau | 851.62 mi (1,370.55 km) |
| Boucau to Olching | 694.42 mi (1,117.56 km) |
| Boucau to Oldenburg | 798.66 mi (1,285.32 km) |
| Boucau to Oldenburg in Holstein | 929.85 mi (1,496.44 km) |
| Boucau to Olfen | 699.70 mi (1,126.05 km) |
| Boucau to Olpe | 676.39 mi (1,088.54 km) |
| Boucau to Olsberg | 712.52 mi (1,146.69 km) |
| Boucau to Oranienburg | 928.17 mi (1,493.75 km) |
| Boucau to Ortenberg | 684.46 mi (1,101.54 km) |
| Boucau to Oschatz | 865.86 mi (1,393.47 km) |
