| Gaithersburg to Burley (Idaho) | 1,911.60 mi (3,076.42 km) |
| Gaithersburg to Burlingame (California) | 2,423.20 mi (3,899.77 km) |
| Gaithersburg to Burlington (Iowa) | 744.82 mi (1,198.68 km) |
| Gaithersburg to Burlington (Kentucky) | 402.69 mi (648.07 km) |
| Gaithersburg to Burlington (North Carolina) | 244.73 mi (393.85 km) |
| Gaithersburg to Burlington (Vermont) | 422.76 mi (680.36 km) |
| Gaithersburg to Burlington (Wisconsin) | 626.54 mi (1,008.31 km) |
| Gaithersburg to Burnsville (Minnesota) | 910.52 mi (1,465.34 km) |
| Gaithersburg to Burr Ridge (Illinois) | 590.80 mi (950.80 km) |
| Gaithersburg to Burton (Michigan) | 427.02 mi (687.23 km) |
| Gaithersburg to Burtonsville (Maryland) | 14.93 mi (24.02 km) |
| Gaithersburg to Butler (Pennsylvania) | 185.47 mi (298.49 km) |
| Gaithersburg to Butte (Montana) | 1,848.04 mi (2,974.13 km) |
| Gaithersburg to Byram (Mississippi) | 875.44 mi (1,408.88 km) |
| Gaithersburg to Cabot (Arkansas) | 864.67 mi (1,391.55 km) |
