| Gaithersburg to Bay City (Michigan) | 462.98 mi (745.10 km) |
| Gaithersburg to Bay City (Texas) | 1,277.90 mi (2,056.58 km) |
| Gaithersburg to Bay Point (California) | 2,393.23 mi (3,851.54 km) |
| Gaithersburg to Bay Shore (New York) | 237.10 mi (381.57 km) |
| Gaithersburg to Bay Village (Ohio) | 296.89 mi (477.79 km) |
| Gaithersburg to Bayamón (Puerto Rico) | 1,579.47 mi (2,541.91 km) |
| Gaithersburg to Bayonet Point (Florida) | 809.86 mi (1,303.34 km) |
| Gaithersburg to Bayonne (New Jersey) | 195.33 mi (314.35 km) |
| Gaithersburg to Bayou Blue (Louisiana) | 1,007.89 mi (1,622.04 km) |
| Gaithersburg to Bayou Cane (Louisiana) | 1,011.71 mi (1,628.19 km) |
| Gaithersburg to Bayshore Gardens (Florida) | 865.32 mi (1,392.60 km) |
| Gaithersburg to Baytown (Texas) | 1,197.84 mi (1,927.73 km) |
| Gaithersburg to Beach Park (Illinois) | 601.04 mi (967.28 km) |
| Gaithersburg to Beachwood (New Jersey) | 169.56 mi (272.88 km) |
| Gaithersburg to Beachwood (Ohio) | 277.90 mi (447.24 km) |
