| Duluth to Redondela | 3,925.22 mi (6,317.03 km) |
| Duluth to Reinosa | 4,079.26 mi (6,564.94 km) |
| Duluth to Requena | 4,353.78 mi (7,006.73 km) |
| Duluth to Reus | 4,369.15 mi (7,031.47 km) |
| Duluth to Rianxo | 3,902.22 mi (6,280.02 km) |
| Duluth to Ribadeo | 3,939.84 mi (6,340.56 km) |
| Duluth to Rincon de la Victoria | 4,343.13 mi (6,989.59 km) |
| Duluth to Ripoll | 4,365.37 mi (7,025.38 km) |
| Duluth to Ripollet | 4,395.48 mi (7,073.84 km) |
| Duluth to Rojales | 4,431.58 mi (7,131.94 km) |
| Duluth to Ronda | 4,304.60 mi (6,927.59 km) |
| Duluth to Roquetas de Mar | 4,411.79 mi (7,100.08 km) |
| Duluth to Rosas | 4,401.02 mi (7,082.77 km) |
| Duluth to Rubi | 4,390.71 mi (7,066.17 km) |
| Duluth to Rute | 4,313.16 mi (6,941.36 km) |
