| Houston to Redondela | 4,716.38 mi (7,590.29 km) |
| Houston to Reinosa | 4,908.22 mi (7,899.01 km) |
| Houston to Requena | 5,153.28 mi (8,293.41 km) |
| Houston to Reus | 5,205.93 mi (8,378.13 km) |
| Houston to Rianxo | 4,697.79 mi (7,560.36 km) |
| Houston to Ribadeo | 4,759.26 mi (7,659.29 km) |
| Houston to Rincon de la Victoria | 5,080.18 mi (8,175.75 km) |
| Houston to Ripoll | 5,222.61 mi (8,404.97 km) |
| Houston to Ripollet | 5,243.51 mi (8,438.61 km) |
| Houston to Rojales | 5,214.46 mi (8,391.87 km) |
| Houston to Ronda | 5,035.33 mi (8,103.58 km) |
| Houston to Roquetas de Mar | 5,162.07 mi (8,307.55 km) |
| Houston to Rosas | 5,265.25 mi (8,473.59 km) |
| Houston to Rubi | 5,237.88 mi (8,429.56 km) |
| Houston to Rute | 5,058.43 mi (8,140.76 km) |
