| Port Huron to Rosemont (California) | 2,040.91 mi (3,284.53 km) |
| Port Huron to Rosemount (Minnesota) | 542.82 mi (873.59 km) |
| Port Huron to Rosenberg (Texas) | 1,187.52 mi (1,911.14 km) |
| Port Huron to Roseville (California) | 2,033.59 mi (3,272.75 km) |
| Port Huron to Roseville (Michigan) | 41.41 mi (66.64 km) |
| Port Huron to Roseville (Minnesota) | 550.35 mi (885.70 km) |
| Port Huron to Rossmoor (California) | 2,014.75 mi (3,242.43 km) |
| Port Huron to Rossville (Maryland) | 398.43 mi (641.21 km) |
| Port Huron to Roswell (Georgia) | 626.44 mi (1,008.16 km) |
| Port Huron to Roswell (New Mexico) | 1,365.24 mi (2,197.14 km) |
| Port Huron to Round Lake (Illinois) | 291.24 mi (468.70 km) |
| Port Huron to Round Lake Beach (Illinois) | 289.55 mi (465.98 km) |
| Port Huron to Round Rock (Texas) | 1,200.81 mi (1,932.52 km) |
| Port Huron to Rowland Heights (California) | 1,999.16 mi (3,217.33 km) |
| Port Huron to Rowlett (Texas) | 1,034.09 mi (1,664.21 km) |
