| South Houston to Ratingen | 5,125.73 mi (8,249.07 km) |
| South Houston to Ratzeburg | 5,188.57 mi (8,350.19 km) |
| South Houston to Raubling | 5,451.18 mi (8,772.83 km) |
| South Houston to Rauenberg | 5,265.16 mi (8,473.45 km) |
| South Houston to Raunheim | 5,229.77 mi (8,416.50 km) |
| South Houston to Ravensburg | 5,352.63 mi (8,614.23 km) |
| South Houston to Recke | 5,123.57 mi (8,245.59 km) |
| South Houston to Recklinghausen | 5,128.33 mi (8,253.25 km) |
| South Houston to Regen | 5,447.17 mi (8,766.38 km) |
| South Houston to Regensburg | 5,405.14 mi (8,698.74 km) |
| South Houston to Regenstauf | 5,402.95 mi (8,695.20 km) |
| South Houston to Rehau | 5,357.54 mi (8,622.13 km) |
| South Houston to Rehburg-Loccum | 5,175.85 mi (8,329.72 km) |
| South Houston to Rehlingen-Siersburg | 5,182.03 mi (8,339.67 km) |
| South Houston to Reichelsheim | 5,255.14 mi (8,457.34 km) |
