| Mercer Island to Isabela (Puerto Rico) | 3,674.54 mi (5,913.60 km) |
| Mercer Island to Iselin (New Jersey) | 2,387.85 mi (3,842.87 km) |
| Mercer Island to Isla Vista (California) | 917.06 mi (1,475.86 km) |
| Mercer Island to Issaquah (Washington) | 8.76 mi (14.09 km) |
| Mercer Island to Ithaca (New York) | 2,228.73 mi (3,586.79 km) |
| Mercer Island to Ives Estates (Florida) | 2,716.92 mi (4,372.46 km) |
| Mercer Island to Jackson (Michigan) | 1,868.04 mi (3,006.32 km) |
| Mercer Island to Jackson (Mississippi) | 1,975.64 mi (3,179.49 km) |
| Mercer Island to Jackson (Missouri) | 1,786.73 mi (2,875.46 km) |
| Mercer Island to Jackson (Tennessee) | 1,892.12 mi (3,045.07 km) |
| Mercer Island to Jackson (Wyoming) | 621.79 mi (1,000.67 km) |
| Mercer Island to Jacksonville (Alabama) | 2,108.53 mi (3,393.35 km) |
| Mercer Island to Jacksonville (Arkansas) | 1,776.93 mi (2,859.70 km) |
| Mercer Island to Jacksonville (Florida) | 2,445.46 mi (3,935.59 km) |
| Mercer Island to Jacksonville (Illinois) | 1,675.08 mi (2,695.78 km) |
