| Alpena to Sesena | 3,902.16 mi (6,279.92 km) |
| Alpena to Sestao | 3,812.28 mi (6,135.28 km) |
| Alpena to Sevilla | 3,910.01 mi (6,292.55 km) |
| Alpena to Sevilla La Nueva | 3,878.33 mi (6,241.57 km) |
| Alpena to Silla | 4,075.32 mi (6,558.60 km) |
| Alpena to Silleda | 3,607.89 mi (5,806.33 km) |
| Alpena to Sitges | 4,096.47 mi (6,592.63 km) |
| Alpena to Socuellamos | 3,973.28 mi (6,394.37 km) |
| Alpena to Soller | 4,193.73 mi (6,749.16 km) |
| Alpena to Solsona | 4,054.32 mi (6,524.80 km) |
| Alpena to Son Servera | 4,227.99 mi (6,804.29 km) |
| Alpena to Sonseca | 3,906.47 mi (6,286.86 km) |
| Alpena to Sopelana | 3,810.83 mi (6,132.93 km) |
| Alpena to Soria | 3,892.78 mi (6,264.83 km) |
| Alpena to Suances | 3,763.21 mi (6,056.31 km) |
