| Willoughby to Sesena | 3,914.24 mi (6,299.36 km) |
| Willoughby to Sestao | 3,840.74 mi (6,181.08 km) |
| Willoughby to Sevilla | 3,903.89 mi (6,282.70 km) |
| Willoughby to Sevilla La Nueva | 3,890.83 mi (6,261.69 km) |
| Willoughby to Silla | 4,091.21 mi (6,584.16 km) |
| Willoughby to Silleda | 3,623.15 mi (5,830.90 km) |
| Willoughby to Sitges | 4,125.33 mi (6,639.08 km) |
| Willoughby to Socuellamos | 3,983.62 mi (6,411.02 km) |
| Willoughby to Soller | 4,218.21 mi (6,788.56 km) |
| Willoughby to Solsona | 4,085.92 mi (6,575.65 km) |
| Willoughby to Son Servera | 4,253.31 mi (6,845.04 km) |
| Willoughby to Sonseca | 3,916.15 mi (6,302.44 km) |
| Willoughby to Sopelana | 3,839.67 mi (6,179.35 km) |
| Willoughby to Soria | 3,915.12 mi (6,300.77 km) |
| Willoughby to Suances | 3,790.22 mi (6,099.76 km) |
