| Houghton Regis to Quarteira | 1,089.50 mi (1,753.37 km) |
| Houghton Regis to Queluz | 1,001.37 mi (1,611.54 km) |
| Houghton Regis to Reguengos de Monsaraz | 991.33 mi (1,595.39 km) |
| Houghton Regis to Resende | 824.67 mi (1,327.17 km) |
| Houghton Regis to Ribeira Brava | 1,565.64 mi (2,519.66 km) |
| Houghton Regis to Ribeira Grande | 1,550.35 mi (2,495.05 km) |
| Houghton Regis to Rio de Mouro | 1,001.59 mi (1,611.90 km) |
| Houghton Regis to Rio Maior | 957.39 mi (1,540.77 km) |
| Houghton Regis to Rio Tinto | 832.50 mi (1,339.79 km) |
| Houghton Regis to Sabugal | 856.99 mi (1,379.20 km) |
| Houghton Regis to Sacavem | 995.38 mi (1,601.90 km) |
| Houghton Regis to Salvaterra de Magos | 974.74 mi (1,568.69 km) |
| Houghton Regis to Santa Comba Dao | 872.83 mi (1,404.68 km) |
| Houghton Regis to Santa Cruz | 1,559.06 mi (2,509.06 km) |
| Houghton Regis to Santa Iria da Azoia | 991.70 mi (1,595.98 km) |
