| Irmo to Sesimbra | 3,922.59 mi (6,312.80 km) |
| Irmo to Setubal | 3,931.26 mi (6,326.76 km) |
| Irmo to Sever do Vouga | 3,907.76 mi (6,288.93 km) |
| Irmo to Silves | 3,986.35 mi (6,415.42 km) |
| Irmo to Sines | 3,946.06 mi (6,350.57 km) |
| Irmo to Sintra | 3,899.72 mi (6,275.99 km) |
| Irmo to Sobrado de Paiva | 3,906.15 mi (6,286.34 km) |
| Irmo to Sobral de Monte Agraco | 3,906.73 mi (6,287.27 km) |
| Irmo to Soure | 3,909.60 mi (6,291.89 km) |
| Irmo to Tabua | 3,932.82 mi (6,329.26 km) |
| Irmo to Tavira | 4,028.68 mi (6,483.53 km) |
| Irmo to Tomar | 3,930.60 mi (6,325.69 km) |
| Irmo to Tondela | 3,926.63 mi (6,319.30 km) |
| Irmo to Torre de Moncorvo | 3,958.37 mi (6,370.38 km) |
| Irmo to Torres Novas | 3,927.77 mi (6,321.13 km) |
