| Port Huron to Ridgeland (Mississippi) | 841.61 mi (1,354.44 km) |
| Port Huron to Ridgewood (New Jersey) | 449.18 mi (722.88 km) |
| Port Huron to Rifle (Colorado) | 1,331.93 mi (2,143.54 km) |
| Port Huron to Rincon (Georgia) | 741.33 mi (1,193.06 km) |
| Port Huron to Ringwood (New Jersey) | 438.27 mi (705.32 km) |
| Port Huron to Río Grande (Puerto Rico) | 1,957.00 mi (3,149.49 km) |
| Port Huron to Rio Grande City (Texas) | 1,471.51 mi (2,368.17 km) |
| Port Huron to Rio Linda (California) | 2,041.78 mi (3,285.93 km) |
| Port Huron to Rio Rancho (New Mexico) | 1,398.31 mi (2,250.37 km) |
| Port Huron to Rio Rico (Arizona) | 1,747.71 mi (2,812.66 km) |
| Port Huron to Ripon (California) | 2,050.35 mi (3,299.72 km) |
| Port Huron to River Edge (New Jersey) | 454.14 mi (730.87 km) |
| Port Huron to River Falls (Wisconsin) | 522.89 mi (841.50 km) |
| Port Huron to River Forest (Illinois) | 284.40 mi (457.70 km) |
| Port Huron to River Grove (Illinois) | 284.72 mi (458.21 km) |
