| Waltham to Smithville (Missouri) | 1,232.13 mi (1,982.92 km) |
| Waltham to Smyrna (Delaware) | 312.68 mi (503.22 km) |
| Waltham to Smyrna (Georgia) | 929.48 mi (1,495.85 km) |
| Waltham to Smyrna (Tennessee) | 929.09 mi (1,495.22 km) |
| Waltham to Snellville (Georgia) | 908.53 mi (1,462.14 km) |
| Waltham to Snoqualmie (Washington) | 2,454.79 mi (3,950.61 km) |
| Waltham to Snyder (Texas) | 1,746.02 mi (2,809.94 km) |
| Waltham to Socastee (South Carolina) | 734.18 mi (1,181.55 km) |
| Waltham to Socorro (Texas) | 2,052.19 mi (3,302.68 km) |
| Waltham to Soddy-Daisy (Tennessee) | 895.53 mi (1,441.22 km) |
| Waltham to Solana Beach (California) | 2,565.09 mi (4,128.12 km) |
| Waltham to Soledad (California) | 2,666.60 mi (4,291.47 km) |
| Waltham to Solon (Ohio) | 528.76 mi (850.96 km) |
| Waltham to Somers Point (New Jersey) | 275.58 mi (443.50 km) |
| Waltham to Somerset (Kentucky) | 798.04 mi (1,284.32 km) |
