| Alpena to Sesimbra | 3,722.64 mi (5,991.01 km) |
| Alpena to Setubal | 3,729.05 mi (6,001.33 km) |
| Alpena to Sever do Vouga | 3,671.69 mi (5,909.02 km) |
| Alpena to Silves | 3,800.31 mi (6,116.02 km) |
| Alpena to Sines | 3,751.70 mi (6,037.77 km) |
| Alpena to Sintra | 3,696.29 mi (5,948.61 km) |
| Alpena to Sobrado de Paiva | 3,665.35 mi (5,898.81 km) |
| Alpena to Sobral de Monte Agraco | 3,698.95 mi (5,952.88 km) |
| Alpena to Soure | 3,684.52 mi (5,929.67 km) |
| Alpena to Tabua | 3,700.30 mi (5,955.06 km) |
| Alpena to Tavira | 3,839.13 mi (6,178.48 km) |
| Alpena to Tomar | 3,710.75 mi (5,971.87 km) |
| Alpena to Tondela | 3,692.19 mi (5,942.01 km) |
| Alpena to Torre de Moncorvo | 3,709.65 mi (5,970.11 km) |
| Alpena to Torres Novas | 3,710.40 mi (5,971.31 km) |
