| Willoughby to Suffolk (Virginia) | 426.74 mi (686.78 km) |
| Willoughby to Sugar Hill (Georgia) | 540.38 mi (869.66 km) |
| Willoughby to Sugar Land (Texas) | 1,151.04 mi (1,852.42 km) |
| Willoughby to Sugarland Run (Virginia) | 278.76 mi (448.62 km) |
| Willoughby to Sugarmill Woods (Florida) | 894.52 mi (1,439.59 km) |
| Willoughby to Suisun City (California) | 2,143.47 mi (3,449.58 km) |
| Willoughby to Suitland (Maryland) | 305.38 mi (491.46 km) |
| Willoughby to Sulphur (Louisiana) | 1,031.84 mi (1,660.58 km) |
| Willoughby to Sulphur Springs (Texas) | 974.12 mi (1,567.70 km) |
| Willoughby to Summerfield (Maryland) | 305.17 mi (491.13 km) |
| Willoughby to Summerfield (North Carolina) | 385.08 mi (619.72 km) |
| Willoughby to Summerlin South (Nevada) | 1,851.45 mi (2,979.62 km) |
| Willoughby to Summerville (South Carolina) | 601.05 mi (967.29 km) |
| Willoughby to Summit (Illinois) | 330.46 mi (531.83 km) |
| Willoughby to Summit (New Jersey) | 371.78 mi (598.32 km) |
