| Mercer Island to Brown Deer (Wisconsin) | 1,676.11 mi (2,697.44 km) |
| Mercer Island to Brownsburg (Indiana) | 1,850.23 mi (2,977.66 km) |
| Mercer Island to Brownsville (Florida) | 2,721.19 mi (4,379.33 km) |
| Mercer Island to Brownsville (Texas) | 2,007.43 mi (3,230.64 km) |
| Mercer Island to Brownwood (Texas) | 1,640.79 mi (2,640.60 km) |
| Mercer Island to Brunswick (Georgia) | 2,418.22 mi (3,891.75 km) |
| Mercer Island to Brunswick (Ohio) | 2,017.90 mi (3,247.49 km) |
| Mercer Island to Brushy Creek (Texas) | 1,751.41 mi (2,818.62 km) |
| Mercer Island to Bryan (Texas) | 1,797.02 mi (2,892.03 km) |
| Mercer Island to Bryant (Arkansas) | 1,772.58 mi (2,852.69 km) |
| Mercer Island to Bryn Mawr-Skyway (Washington) | 4.94 mi (7.95 km) |
| Mercer Island to Buckeye (Arizona) | 1,096.92 mi (1,765.32 km) |
| Mercer Island to Buckhall (Virginia) | 2,304.24 mi (3,708.31 km) |
| Mercer Island to Bucyrus (Ohio) | 1,977.87 mi (3,183.08 km) |
| Mercer Island to Buda (Texas) | 1,770.12 mi (2,848.74 km) |
