| Gaithersburg to Brie-Comte-Robert | 3,843.54 mi (6,185.59 km) |
| Gaithersburg to Brignais | 4,019.90 mi (6,469.40 km) |
| Gaithersburg to Brignoles | 4,147.01 mi (6,673.97 km) |
| Gaithersburg to Brive-la-Gaillarde | 3,892.69 mi (6,264.68 km) |
| Gaithersburg to Bron | 4,024.93 mi (6,477.49 km) |
| Gaithersburg to Bruay-sur-l'Escaut | 3,837.83 mi (6,176.39 km) |
| Gaithersburg to Bruges | 3,804.19 mi (6,122.26 km) |
| Gaithersburg to Brumath | 4,055.04 mi (6,525.96 km) |
| Gaithersburg to Brunoy | 3,838.90 mi (6,178.11 km) |
| Gaithersburg to Bruz | 3,673.95 mi (5,912.65 km) |
| Gaithersburg to Bry-sur-Marne | 3,835.91 mi (6,173.30 km) |
| Gaithersburg to Bully-les-Mines | 3,803.35 mi (6,120.90 km) |
| Gaithersburg to Bures-sur-Yvette | 3,824.45 mi (6,154.85 km) |
| Gaithersburg to Bussy-Saint-Georges | 3,843.29 mi (6,185.18 km) |
| Gaithersburg to Buxerolles | 3,801.25 mi (6,117.52 km) |
