| Mercer Island to Bonham (Texas) | 1,660.42 mi (2,672.18 km) |
| Mercer Island to Bonita (California) | 1,064.99 mi (1,713.93 km) |
| Mercer Island to Bonita Springs (Florida) | 2,627.10 mi (4,227.91 km) |
| Mercer Island to Bonney Lake (Washington) | 26.90 mi (43.28 km) |
| Mercer Island to Boone (Iowa) | 1,432.24 mi (2,304.98 km) |
| Mercer Island to Boone (North Carolina) | 2,199.47 mi (3,539.70 km) |
| Mercer Island to Borger (Texas) | 1,347.20 mi (2,168.11 km) |
| Mercer Island to Bossier City (Louisiana) | 1,817.26 mi (2,924.60 km) |
| Mercer Island to Boston (Massachusetts) | 2,481.54 mi (3,993.66 km) |
| Mercer Island to Bostonia (California) | 1,055.76 mi (1,699.08 km) |
| Mercer Island to Bothell (Washington) | 14.39 mi (23.15 km) |
| Mercer Island to Bothell East (Washington) | 16.75 mi (26.96 km) |
| Mercer Island to Bothell West (Washington) | 16.55 mi (26.64 km) |
| Mercer Island to Boulder (Colorado) | 991.05 mi (1,594.94 km) |
| Mercer Island to Boulder City (Nevada) | 892.54 mi (1,436.40 km) |
