| Houston to Ratingen | 5,125.17 mi (8,248.16 km) |
| Houston to Ratzeburg | 5,187.25 mi (8,348.06 km) |
| Houston to Raubling | 5,450.92 mi (8,772.41 km) |
| Houston to Rauenberg | 5,264.87 mi (8,472.99 km) |
| Houston to Raunheim | 5,229.35 mi (8,415.82 km) |
| Houston to Ravensburg | 5,352.57 mi (8,614.14 km) |
| Houston to Recke | 5,122.72 mi (8,244.23 km) |
| Houston to Recklinghausen | 5,127.68 mi (8,252.21 km) |
| Houston to Regen | 5,446.60 mi (8,765.46 km) |
| Houston to Regensburg | 5,404.64 mi (8,697.94 km) |
| Houston to Regenstauf | 5,402.42 mi (8,694.36 km) |
| Houston to Rehau | 5,356.81 mi (8,620.95 km) |
| Houston to Rehburg-Loccum | 5,174.88 mi (8,328.17 km) |
| Houston to Rehlingen-Siersburg | 5,181.87 mi (8,339.42 km) |
| Houston to Reichelsheim | 5,254.76 mi (8,456.72 km) |
