| Boulder to Worthington (Ohio) | 1,172.58 mi (1,887.08 km) |
| Boulder to Wright (Florida) | 1,237.57 mi (1,991.68 km) |
| Boulder to Wyandanch (New York) | 1,669.71 mi (2,687.13 km) |
| Boulder to Wyandotte (Michigan) | 1,156.74 mi (1,861.59 km) |
| Boulder to Wylie (Texas) | 683.73 mi (1,100.35 km) |
| Boulder to Wyndham (Virginia) | 1,489.80 mi (2,397.60 km) |
| Boulder to Wyoming (Michigan) | 1,028.83 mi (1,655.74 km) |
| Boulder to Wyomissing (Pennsylvania) | 1,538.85 mi (2,476.53 km) |
| Boulder to Xenia (Ohio) | 1,127.92 mi (1,815.22 km) |
| Boulder to Yakima (Washington) | 890.72 mi (1,433.48 km) |
| Boulder to Yankton (South Dakota) | 452.33 mi (727.96 km) |
| Boulder to Yauco (Puerto Rico) | 2,740.42 mi (4,410.28 km) |
| Boulder to Yazoo City (Mississippi) | 960.23 mi (1,545.34 km) |
| Boulder to Yeadon (Pennsylvania) | 1,580.75 mi (2,543.97 km) |
| Boulder to Yelm (Washington) | 990.33 mi (1,593.78 km) |
