| Port Huron to Redondela | 3,623.75 mi (5,831.87 km) |
| Port Huron to Reinosa | 3,800.66 mi (6,116.56 km) |
| Port Huron to Requena | 4,060.16 mi (6,534.19 km) |
| Port Huron to Reus | 4,097.10 mi (6,593.65 km) |
| Port Huron to Rianxo | 3,603.04 mi (5,798.53 km) |
| Port Huron to Ribadeo | 3,654.62 mi (5,881.55 km) |
| Port Huron to Rincon de la Victoria | 4,016.51 mi (6,463.94 km) |
| Port Huron to Ripoll | 4,105.73 mi (6,607.54 km) |
| Port Huron to Ripollet | 4,130.37 mi (6,647.18 km) |
| Port Huron to Rojales | 4,129.41 mi (6,645.65 km) |
| Port Huron to Ronda | 3,974.53 mi (6,396.39 km) |
| Port Huron to Roquetas de Mar | 4,092.39 mi (6,586.06 km) |
| Port Huron to Rosas | 4,145.95 mi (6,672.27 km) |
| Port Huron to Rubi | 4,125.05 mi (6,638.63 km) |
| Port Huron to Rute | 3,990.43 mi (6,421.98 km) |
