| Mercer Island to Carrollwood (Florida) | 2,513.16 mi (4,044.53 km) |
| Mercer Island to Carson (California) | 970.81 mi (1,562.36 km) |
| Mercer Island to Carson City (Nevada) | 594.58 mi (956.88 km) |
| Mercer Island to Carteret (New Jersey) | 2,391.47 mi (3,848.69 km) |
| Mercer Island to Cartersville (Georgia) | 2,136.97 mi (3,439.12 km) |
| Mercer Island to Carthage (Missouri) | 1,584.44 mi (2,549.91 km) |
| Mercer Island to Cary (Illinois) | 1,689.69 mi (2,719.29 km) |
| Mercer Island to Cary (North Carolina) | 2,348.21 mi (3,779.08 km) |
| Mercer Island to Casa de Oro-Mount Helix (California) | 1,059.16 mi (1,704.55 km) |
| Mercer Island to Casa Grande (Arizona) | 1,151.17 mi (1,852.64 km) |
| Mercer Island to Casas Adobes (Arizona) | 1,205.26 mi (1,939.68 km) |
| Mercer Island to Cascades (Virginia) | 2,295.92 mi (3,694.92 km) |
| Mercer Island to Casper (Wyoming) | 838.57 mi (1,349.56 km) |
| Mercer Island to Casselberry (Florida) | 2,537.91 mi (4,084.37 km) |
| Mercer Island to Castaic (California) | 923.04 mi (1,485.49 km) |
