| Boulder to Saddlebrooke (Arizona) | 603.17 mi (970.70 km) |
| Boulder to Safety Harbor (Florida) | 1,528.63 mi (2,460.10 km) |
| Boulder to Saginaw (Michigan) | 1,120.03 mi (1,802.51 km) |
| Boulder to Saginaw (Texas) | 660.36 mi (1,062.74 km) |
| Boulder to Sahuarita (Arizona) | 643.59 mi (1,035.75 km) |
| Boulder to Saks (Alabama) | 1,154.53 mi (1,858.04 km) |
| Boulder to Salem (Massachusetts) | 1,779.90 mi (2,864.47 km) |
| Boulder to Salem (Ohio) | 1,280.07 mi (2,060.08 km) |
| Boulder to Salem (Oregon) | 964.40 mi (1,552.06 km) |
| Boulder to Salem (Virginia) | 1,367.97 mi (2,201.54 km) |
| Boulder to Salem Lakes (Wisconsin) | 904.14 mi (1,455.07 km) |
| Boulder to Salida (California) | 865.39 mi (1,392.70 km) |
| Boulder to Salina (Kansas) | 416.05 mi (669.57 km) |
| Boulder to Salinas (California) | 915.41 mi (1,473.21 km) |
| Boulder to Salisbury (Maryland) | 1,585.15 mi (2,551.06 km) |
