| London Colney to Black Forest (Colorado) | 4,695.43 mi (7,556.56 km) |
| London Colney to Blackfoot (Idaho) | 4,727.15 mi (7,607.61 km) |
| London Colney to Blackhawk (California) | 5,320.46 mi (8,562.45 km) |
| London Colney to Blacksburg (Virginia) | 3,867.61 mi (6,224.32 km) |
| London Colney to Blackwells Mills (New Jersey) | 3,483.78 mi (5,606.61 km) |
| London Colney to Blaine (Minnesota) | 3,985.49 mi (6,414.02 km) |
| London Colney to Bloomingdale (Florida) | 4,398.70 mi (7,079.02 km) |
| London Colney to Bloomingdale (Illinois) | 3,948.11 mi (6,353.87 km) |
| London Colney to Bloomington (California) | 5,397.41 mi (8,686.29 km) |
| London Colney to Bloomington (Illinois) | 4,051.07 mi (6,519.57 km) |
| London Colney to Bloomington (Indiana) | 4,019.12 mi (6,468.15 km) |
| London Colney to Bloomington (Minnesota) | 4,005.31 mi (6,445.92 km) |
| London Colney to Bloomsburg (Pennsylvania) | 3,535.94 mi (5,690.55 km) |
| London Colney to Blue Ash (Ohio) | 3,931.22 mi (6,326.69 km) |
| London Colney to Blue Island (Illinois) | 3,946.25 mi (6,350.87 km) |
