| Potomac to Rosolini | 4,786.09 mi (7,702.47 km) |
| Potomac to Rossano | 4,756.27 mi (7,654.48 km) |
| Potomac to Rottofreno | 4,251.02 mi (6,841.36 km) |
| Potomac to Rovato | 4,253.76 mi (6,845.77 km) |
| Potomac to Roverbella | 4,296.40 mi (6,914.38 km) |
| Potomac to Rovereto | 4,288.08 mi (6,901.00 km) |
| Potomac to Rovigo | 4,346.40 mi (6,994.86 km) |
| Potomac to Rozzano | 4,223.35 mi (6,796.82 km) |
| Potomac to Rubano | 4,334.09 mi (6,975.04 km) |
| Potomac to Rubiera | 4,317.60 mi (6,948.51 km) |
| Potomac to Ruffano | 4,811.24 mi (7,742.95 km) |
| Potomac to Russi | 4,380.57 mi (7,049.85 km) |
| Potomac to Rutigliano | 4,715.72 mi (7,589.22 km) |
| Potomac to Ruvo di Puglia | 4,690.61 mi (7,548.81 km) |
| Potomac to Sabaudia | 4,531.91 mi (7,293.40 km) |
