| Opoczno to Bougival | 820.19 mi (1,319.97 km) |
| Opoczno to Bouguenais | 1,024.89 mi (1,649.40 km) |
| Opoczno to Boulogne-Billancourt | 816.51 mi (1,314.04 km) |
| Opoczno to Boulogne-sur-Mer | 810.04 mi (1,303.64 km) |
| Opoczno to Bourg-de-Peage | 824.68 mi (1,327.19 km) |
| Opoczno to Bourg-en-Bresse | 770.96 mi (1,240.75 km) |
| Opoczno to Bourg-la-Reine | 814.60 mi (1,310.97 km) |
| Opoczno to Bourg-les-Valence | 834.47 mi (1,342.96 km) |
| Opoczno to Bourges | 857.30 mi (1,379.70 km) |
| Opoczno to Bourgoin-Jallieu | 793.37 mi (1,276.80 km) |
| Opoczno to Bressuire | 986.63 mi (1,587.82 km) |
| Opoczno to Brest | 1,116.59 mi (1,796.98 km) |
| Opoczno to Bretigny-sur-Orge | 818.94 mi (1,317.96 km) |
| Opoczno to Breuillet | 825.79 mi (1,328.99 km) |
| Opoczno to Briancon | 770.56 mi (1,240.09 km) |
