| Port Huron to Rosolini | 4,873.47 mi (7,843.08 km) |
| Port Huron to Rossano | 4,822.50 mi (7,761.06 km) |
| Port Huron to Rottofreno | 4,305.39 mi (6,928.85 km) |
| Port Huron to Rovato | 4,303.58 mi (6,925.94 km) |
| Port Huron to Roverbella | 4,346.03 mi (6,994.25 km) |
| Port Huron to Rovereto | 4,332.96 mi (6,973.22 km) |
| Port Huron to Rovigo | 4,394.33 mi (7,071.98 km) |
| Port Huron to Rozzano | 4,276.70 mi (6,882.68 km) |
| Port Huron to Rubano | 4,379.80 mi (7,048.61 km) |
| Port Huron to Rubiera | 4,371.13 mi (7,034.65 km) |
| Port Huron to Ruffano | 4,869.79 mi (7,837.17 km) |
| Port Huron to Russi | 4,432.25 mi (7,133.02 km) |
| Port Huron to Rutigliano | 4,773.25 mi (7,681.80 km) |
| Port Huron to Ruvo di Puglia | 4,748.41 mi (7,641.83 km) |
| Port Huron to Sabaudia | 4,599.50 mi (7,402.18 km) |
