| Harrow to Sesimbra | 1,001.82 mi (1,612.28 km) |
| Harrow to Setubal | 992.46 mi (1,597.21 km) |
| Harrow to Sever do Vouga | 841.04 mi (1,353.53 km) |
| Harrow to Silves | 1,070.39 mi (1,722.62 km) |
| Harrow to Sines | 1,028.54 mi (1,655.27 km) |
| Harrow to Sintra | 985.20 mi (1,585.53 km) |
| Harrow to Sobrado de Paiva | 820.01 mi (1,319.68 km) |
| Harrow to Sobral de Monte Agraco | 966.30 mi (1,555.11 km) |
| Harrow to Soure | 889.88 mi (1,432.13 km) |
| Harrow to Tabua | 857.61 mi (1,380.19 km) |
| Harrow to Tavira | 1,061.40 mi (1,708.16 km) |
| Harrow to Tomar | 913.99 mi (1,470.93 km) |
| Harrow to Tondela | 848.77 mi (1,365.96 km) |
| Harrow to Torre de Moncorvo | 786.15 mi (1,265.18 km) |
| Harrow to Torres Novas | 924.88 mi (1,488.45 km) |
