| Boulder to Rosolini | 5,913.27 mi (9,516.49 km) |
| Boulder to Rossano | 5,830.49 mi (9,383.27 km) |
| Boulder to Rottofreno | 5,306.54 mi (8,540.05 km) |
| Boulder to Rovato | 5,297.45 mi (8,525.42 km) |
| Boulder to Roverbella | 5,338.49 mi (8,591.47 km) |
| Boulder to Rovereto | 5,317.94 mi (8,558.40 km) |
| Boulder to Rovigo | 5,382.74 mi (8,662.68 km) |
| Boulder to Rozzano | 5,276.95 mi (8,492.42 km) |
| Boulder to Rubano | 5,364.94 mi (8,634.03 km) |
| Boulder to Rubiera | 5,369.29 mi (8,641.03 km) |
| Boulder to Ruffano | 5,864.12 mi (9,437.38 km) |
| Boulder to Russi | 5,425.87 mi (8,732.10 km) |
| Boulder to Rutigliano | 5,768.15 mi (9,282.95 km) |
| Boulder to Ruvo di Puglia | 5,744.36 mi (9,244.65 km) |
| Boulder to Sabaudia | 5,614.65 mi (9,035.90 km) |
