| Houston to Rosolini | 5,995.79 mi (9,649.29 km) |
| Houston to Rossano | 5,958.66 mi (9,589.54 km) |
| Houston to Rottofreno | 5,447.14 mi (8,766.33 km) |
| Houston to Rovato | 5,447.49 mi (8,766.89 km) |
| Houston to Roverbella | 5,490.09 mi (8,835.44 km) |
| Houston to Rovereto | 5,479.09 mi (8,817.74 km) |
| Houston to Rovigo | 5,539.22 mi (8,914.52 km) |
| Houston to Rozzano | 5,418.91 mi (8,720.89 km) |
| Houston to Rubano | 5,525.64 mi (8,892.66 km) |
| Houston to Rubiera | 5,513.40 mi (8,872.95 km) |
| Houston to Ruffano | 6,010.23 mi (9,672.54 km) |
| Houston to Russi | 5,575.49 mi (8,972.88 km) |
| Houston to Rutigliano | 5,914.09 mi (9,517.81 km) |
| Houston to Ruvo di Puglia | 5,889.08 mi (9,477.55 km) |
| Houston to Sabaudia | 5,734.58 mi (9,228.91 km) |
