| McDonough to Smyrna (Delaware) | 623.53 mi (1,003.48 km) |
| McDonough to Smyrna (Georgia) | 36.06 mi (58.04 km) |
| McDonough to Smyrna (Tennessee) | 220.77 mi (355.29 km) |
| McDonough to Snellville (Georgia) | 29.99 mi (48.26 km) |
| McDonough to Snoqualmie (Washington) | 2,178.72 mi (3,506.32 km) |
| McDonough to Snyder (Texas) | 970.65 mi (1,562.11 km) |
| McDonough to Socastee (South Carolina) | 296.50 mi (477.17 km) |
| McDonough to Socorro (Texas) | 1,291.39 mi (2,078.28 km) |
| McDonough to Soddy-Daisy (Tennessee) | 138.48 mi (222.85 km) |
| McDonough to Solana Beach (California) | 1,905.77 mi (3,067.03 km) |
| McDonough to Soledad (California) | 2,103.70 mi (3,385.58 km) |
| McDonough to Solon (Ohio) | 568.78 mi (915.36 km) |
| McDonough to Somers Point (New Jersey) | 667.74 mi (1,074.62 km) |
| McDonough to Somerset (Kentucky) | 253.09 mi (407.31 km) |
| McDonough to Somerset (New Jersey) | 721.82 mi (1,161.66 km) |
