| Gaithersburg to Bagnolet | 3,830.79 mi (6,165.06 km) |
| Gaithersburg to Bagnols-sur-Ceze | 4,059.29 mi (6,532.79 km) |
| Gaithersburg to Bailleul | 3,796.36 mi (6,109.65 km) |
| Gaithersburg to Balma | 3,935.36 mi (6,333.35 km) |
| Gaithersburg to Bar-le-Duc | 3,948.59 mi (6,354.63 km) |
| Gaithersburg to Barentin | 3,752.20 mi (6,038.58 km) |
| Gaithersburg to Basse-Goulaine | 3,705.87 mi (5,964.03 km) |
| Gaithersburg to Bastia | 4,320.78 mi (6,953.62 km) |
| Gaithersburg to Bayeux | 3,688.77 mi (5,936.50 km) |
| Gaithersburg to Bayonne | 3,802.66 mi (6,119.79 km) |
| Gaithersburg to Beaucaire | 4,071.16 mi (6,551.90 km) |
| Gaithersburg to Beauchamp | 3,817.45 mi (6,143.59 km) |
| Gaithersburg to Beaumont | 3,944.49 mi (6,348.04 km) |
| Gaithersburg to Beaumont-sur-Oise | 3,818.19 mi (6,144.78 km) |
| Gaithersburg to Beaune | 3,984.20 mi (6,411.94 km) |
