| Houghton Regis to Santarem | 958.86 mi (1,543.14 km) |
| Houghton Regis to Santiago do Cacem | 1,037.86 mi (1,670.27 km) |
| Houghton Regis to Santo Andre | 1,036.62 mi (1,668.28 km) |
| Houghton Regis to Santo Tirso | 820.73 mi (1,320.84 km) |
| Houghton Regis to Sao Bras de Alportel | 1,080.56 mi (1,739.00 km) |
| Houghton Regis to Sao Felix da Marinha | 842.92 mi (1,356.55 km) |
| Houghton Regis to Sao Joao da Madeira | 848.71 mi (1,365.87 km) |
| Houghton Regis to Sao Joao de Ver | 846.43 mi (1,362.20 km) |
| Houghton Regis to Sao Mamede de Infesta | 831.98 mi (1,338.95 km) |
| Houghton Regis to Sao Pedro do Sul | 849.44 mi (1,367.04 km) |
| Houghton Regis to Satao | 844.00 mi (1,358.28 km) |
| Houghton Regis to Seia | 863.47 mi (1,389.62 km) |
| Houghton Regis to Senhora da Hora | 833.97 mi (1,342.14 km) |
| Houghton Regis to Serpa | 1,023.50 mi (1,647.17 km) |
| Houghton Regis to Serta | 911.11 mi (1,466.29 km) |
