| Boulder City to Rosolini | 6,476.63 mi (10,423.13 km) |
| Boulder City to Rossano | 6,383.10 mi (10,272.60 km) |
| Boulder City to Rottofreno | 5,860.36 mi (9,431.34 km) |
| Boulder City to Rovato | 5,848.85 mi (9,412.82 km) |
| Boulder City to Roverbella | 5,889.10 mi (9,477.60 km) |
| Boulder City to Rovereto | 5,866.12 mi (9,440.61 km) |
| Boulder City to Rovigo | 5,931.62 mi (9,546.02 km) |
| Boulder City to Rozzano | 5,830.67 mi (9,383.55 km) |
| Boulder City to Rubano | 5,912.81 mi (9,515.75 km) |
| Boulder City to Rubiera | 5,921.64 mi (9,529.95 km) |
| Boulder City to Ruffano | 6,411.53 mi (10,318.36 km) |
| Boulder City to Russi | 5,976.24 mi (9,617.83 km) |
| Boulder City to Rutigliano | 6,316.48 mi (10,165.40 km) |
| Boulder City to Ruvo di Puglia | 6,293.24 mi (10,127.99 km) |
| Boulder City to Sabaudia | 6,171.20 mi (9,931.59 km) |
