| Willoughby to Senftenberg | 4,253.47 mi (6,845.30 km) |
| Willoughby to Siegburg | 4,023.76 mi (6,475.61 km) |
| Willoughby to Siegen | 4,052.11 mi (6,521.24 km) |
| Willoughby to Sigmaringen | 4,195.39 mi (6,751.83 km) |
| Willoughby to Simbach am Inn | 4,337.17 mi (6,979.99 km) |
| Willoughby to Simmerath | 3,995.50 mi (6,430.13 km) |
| Willoughby to Sindelfingen | 4,164.78 mi (6,702.57 km) |
| Willoughby to Sinsheim | 4,141.31 mi (6,664.80 km) |
| Willoughby to Sinzheim | 4,130.23 mi (6,646.96 km) |
| Willoughby to Sinzig | 4,034.05 mi (6,492.18 km) |
| Willoughby to Soest | 4,032.72 mi (6,490.04 km) |
| Willoughby to Solingen | 4,007.12 mi (6,448.84 km) |
| Willoughby to Soltau | 4,049.62 mi (6,517.23 km) |
| Willoughby to Sommerda | 4,159.47 mi (6,694.01 km) |
| Willoughby to Sondershausen | 4,142.95 mi (6,667.44 km) |
