| Sioux City to Redondela | 4,255.84 mi (6,849.11 km) |
| Sioux City to Reinosa | 4,416.82 mi (7,108.19 km) |
| Sioux City to Requena | 4,687.61 mi (7,543.98 km) |
| Sioux City to Reus | 4,708.96 mi (7,578.34 km) |
| Sioux City to Rianxo | 4,233.49 mi (6,813.15 km) |
| Sioux City to Ribadeo | 4,275.30 mi (6,880.43 km) |
| Sioux City to Rincon de la Victoria | 4,666.09 mi (7,509.35 km) |
| Sioux City to Ripoll | 4,708.23 mi (7,577.17 km) |
| Sioux City to Ripollet | 4,737.08 mi (7,623.59 km) |
| Sioux City to Rojales | 4,762.95 mi (7,665.23 km) |
| Sioux City to Ronda | 4,626.23 mi (7,445.20 km) |
| Sioux City to Roquetas de Mar | 4,737.44 mi (7,624.18 km) |
| Sioux City to Rosas | 4,745.00 mi (7,636.35 km) |
| Sioux City to Rubi | 4,732.17 mi (7,615.69 km) |
| Sioux City to Rute | 4,637.47 mi (7,463.28 km) |
