| Mercer Island to Baraboo (Wisconsin) | 1,586.34 mi (2,552.96 km) |
| Mercer Island to Barberton (Ohio) | 2,035.27 mi (3,275.45 km) |
| Mercer Island to Bardstown (Kentucky) | 1,963.70 mi (3,160.28 km) |
| Mercer Island to Barrington (Illinois) | 1,697.10 mi (2,731.22 km) |
| Mercer Island to Barstow (California) | 917.38 mi (1,476.39 km) |
| Mercer Island to Bartlesville (Oklahoma) | 1,529.64 mi (2,461.72 km) |
| Mercer Island to Bartlett (Illinois) | 1,698.35 mi (2,733.22 km) |
| Mercer Island to Bartlett (Tennessee) | 1,865.01 mi (3,001.44 km) |
| Mercer Island to Bartow (Florida) | 2,552.04 mi (4,107.11 km) |
| Mercer Island to Batavia (Illinois) | 1,697.37 mi (2,731.65 km) |
| Mercer Island to Batavia (New York) | 2,135.38 mi (3,436.57 km) |
| Mercer Island to Batesville (Arkansas) | 1,761.82 mi (2,835.38 km) |
| Mercer Island to Baton Rouge (Louisiana) | 2,024.57 mi (3,258.24 km) |
| Mercer Island to Battle Creek (Michigan) | 1,828.00 mi (2,941.88 km) |
| Mercer Island to Battle Ground (Washington) | 124.51 mi (200.38 km) |
