| Port Huron to Roy (Utah) | 1,515.78 mi (2,439.41 km) |
| Port Huron to Royal Kunia (Hawaii) | 4,509.97 mi (7,258.10 km) |
| Port Huron to Royal Oak (Michigan) | 48.86 mi (78.64 km) |
| Port Huron to Royal Palm Beach (Florida) | 1,131.60 mi (1,821.13 km) |
| Port Huron to Royse City (Texas) | 1,021.81 mi (1,644.45 km) |
| Port Huron to Ruskin (Florida) | 1,055.44 mi (1,698.57 km) |
| Port Huron to Russellville (Alabama) | 651.01 mi (1,047.70 km) |
| Port Huron to Russellville (Arkansas) | 781.33 mi (1,257.43 km) |
| Port Huron to Ruston (Louisiana) | 910.40 mi (1,465.15 km) |
| Port Huron to Rutherford (New Jersey) | 453.58 mi (729.97 km) |
| Port Huron to Rutland (Vermont) | 477.45 mi (768.39 km) |
| Port Huron to Sabana Grande (Puerto Rico) | 1,943.91 mi (3,128.42 km) |
| Port Huron to Sachse (Texas) | 1,032.47 mi (1,661.59 km) |
| Port Huron to Saco (Maine) | 603.32 mi (970.95 km) |
| Port Huron to Sacramento (California) | 2,046.11 mi (3,292.90 km) |
