| Dubuque to Bougival | 4,214.98 mi (6,783.35 km) |
| Dubuque to Bouguenais | 4,129.49 mi (6,645.77 km) |
| Dubuque to Boulogne-Billancourt | 4,219.98 mi (6,791.39 km) |
| Dubuque to Boulogne-sur-Mer | 4,126.87 mi (6,641.56 km) |
| Dubuque to Bourg-de-Peage | 4,477.28 mi (7,205.49 km) |
| Dubuque to Bourg-en-Bresse | 4,437.27 mi (7,141.10 km) |
| Dubuque to Bourg-la-Reine | 4,224.89 mi (6,799.31 km) |
| Dubuque to Bourg-les-Valence | 4,474.80 mi (7,201.50 km) |
| Dubuque to Bourges | 4,292.19 mi (6,907.61 km) |
| Dubuque to Bourgoin-Jallieu | 4,463.94 mi (7,184.02 km) |
| Dubuque to Bressuire | 4,187.13 mi (6,738.54 km) |
| Dubuque to Brest | 3,972.25 mi (6,392.72 km) |
| Dubuque to Bretigny-sur-Orge | 4,230.84 mi (6,808.88 km) |
| Dubuque to Breuillet | 4,227.38 mi (6,803.30 km) |
| Dubuque to Briancon | 4,545.56 mi (7,315.36 km) |
