| Mercer Island to Blue Island (Illinois) | 1,732.33 mi (2,787.92 km) |
| Mercer Island to Blue Springs (Missouri) | 1,514.79 mi (2,437.82 km) |
| Mercer Island to Bluffdale (Utah) | 707.15 mi (1,138.04 km) |
| Mercer Island to Bluffton (Indiana) | 1,877.24 mi (3,021.13 km) |
| Mercer Island to Bluffton (South Carolina) | 2,396.35 mi (3,856.55 km) |
| Mercer Island to Blythe (California) | 1,041.69 mi (1,676.44 km) |
| Mercer Island to Blytheville (Arkansas) | 1,832.36 mi (2,948.89 km) |
| Mercer Island to Boca Raton (Florida) | 2,700.36 mi (4,345.81 km) |
| Mercer Island to Boerne (Texas) | 1,752.09 mi (2,819.72 km) |
| Mercer Island to Bogalusa (Louisiana) | 2,062.49 mi (3,319.26 km) |
| Mercer Island to Boiling Springs (South Carolina) | 2,230.70 mi (3,589.97 km) |
| Mercer Island to Boise (Idaho) | 398.89 mi (641.95 km) |
| Mercer Island to Bolingbrook (Illinois) | 1,711.75 mi (2,754.80 km) |
| Mercer Island to Bolivar (Missouri) | 1,606.90 mi (2,586.06 km) |
| Mercer Island to Bon Air (Virginia) | 2,341.29 mi (3,767.94 km) |
