| Ironton to Sesimbra | 3,862.85 mi (6,216.66 km) |
| Ironton to Setubal | 3,870.64 mi (6,229.19 km) |
| Ironton to Sever do Vouga | 3,832.82 mi (6,168.33 km) |
| Ironton to Silves | 3,932.83 mi (6,329.27 km) |
| Ironton to Sines | 3,888.80 mi (6,258.43 km) |
| Ironton to Sintra | 3,838.38 mi (6,177.28 km) |
| Ironton to Sobrado de Paiva | 3,829.22 mi (6,162.54 km) |
| Ironton to Sobral de Monte Agraco | 3,843.62 mi (6,185.70 km) |
| Ironton to Soure | 3,839.27 mi (6,178.71 km) |
| Ironton to Tabua | 3,859.52 mi (6,211.30 km) |
| Ironton to Tavira | 3,973.95 mi (6,395.45 km) |
| Ironton to Tomar | 3,862.59 mi (6,216.24 km) |
| Ironton to Tondela | 3,852.49 mi (6,199.99 km) |
| Ironton to Torre de Moncorvo | 3,878.45 mi (6,241.76 km) |
| Ironton to Torres Novas | 3,860.78 mi (6,213.32 km) |
