| Boulder to Willow Grove (Pennsylvania) | 1,585.29 mi (2,551.28 km) |
| Boulder to Willowbrook (California) | 830.29 mi (1,336.22 km) |
| Boulder to Willowick (Ohio) | 1,244.45 mi (2,002.76 km) |
| Boulder to Wilmette (Illinois) | 922.36 mi (1,484.40 km) |
| Boulder to Wilmington (Delaware) | 1,567.99 mi (2,523.44 km) |
| Boulder to Wilmington (North Carolina) | 1,553.51 mi (2,500.14 km) |
| Boulder to Wilmington (Ohio) | 1,137.14 mi (1,830.05 km) |
| Boulder to Wilmington Island (Georgia) | 1,459.68 mi (2,349.13 km) |
| Boulder to Wilson (North Carolina) | 1,513.15 mi (2,435.18 km) |
| Boulder to Wilsonville (Oregon) | 959.48 mi (1,544.14 km) |
| Boulder to Wilton Manors (Florida) | 1,731.24 mi (2,786.17 km) |
| Boulder to Wimauma (Florida) | 1,560.84 mi (2,511.92 km) |
| Boulder to Winchester (Kentucky) | 1,136.61 mi (1,829.20 km) |
| Boulder to Winchester (Nevada) | 600.49 mi (966.39 km) |
| Boulder to Winchester (Virginia) | 1,437.21 mi (2,312.97 km) |
