| Mercer Island to Wetter (Ruhr) | 4,978.28 mi (8,011.77 km) |
| Mercer Island to Wetzlar | 5,052.01 mi (8,130.43 km) |
| Mercer Island to Weyhe | 4,918.96 mi (7,916.30 km) |
| Mercer Island to Wickede | 4,983.04 mi (8,019.43 km) |
| Mercer Island to Wiefelstede | 4,886.63 mi (7,864.27 km) |
| Mercer Island to Wiehl | 5,006.93 mi (8,057.87 km) |
| Mercer Island to Wiesbaden | 5,074.14 mi (8,166.04 km) |
| Mercer Island to Wiesloch | 5,131.15 mi (8,257.79 km) |
| Mercer Island to Wiesmoor | 4,869.76 mi (7,837.13 km) |
| Mercer Island to Wietmarschen | 4,906.04 mi (7,895.50 km) |
| Mercer Island to Wildau | 5,061.60 mi (8,145.87 km) |
| Mercer Island to Wildberg | 5,171.64 mi (8,322.94 km) |
| Mercer Island to Wildeshausen | 4,914.53 mi (7,909.18 km) |
| Mercer Island to Wilhelmshaven | 4,870.70 mi (7,838.64 km) |
| Mercer Island to Wilkau-Hasslau | 5,136.98 mi (8,267.17 km) |
