| Sioux City to Racale | 5,422.60 mi (8,726.82 km) |
| Sioux City to Racconigi | 4,809.47 mi (7,740.10 km) |
| Sioux City to Raffadali | 5,377.76 mi (8,654.67 km) |
| Sioux City to Ragusa | 5,447.72 mi (8,767.26 km) |
| Sioux City to Ramacca | 5,423.97 mi (8,729.04 km) |
| Sioux City to Randazzo | 5,408.96 mi (8,704.88 km) |
| Sioux City to Rapallo | 4,886.08 mi (7,863.39 km) |
| Sioux City to Ravanusa | 5,401.39 mi (8,692.69 km) |
| Sioux City to Ravenna | 4,991.95 mi (8,033.76 km) |
| Sioux City to Recanati | 5,088.94 mi (8,189.85 km) |
| Sioux City to Recco | 4,882.22 mi (7,857.18 km) |
| Sioux City to Reggello | 5,001.89 mi (8,049.77 km) |
| Sioux City to Reggio di Calabria | 5,424.20 mi (8,729.41 km) |
| Sioux City to Reggio Emilia | 4,921.66 mi (7,920.65 km) |
| Sioux City to Reggiolo | 4,918.35 mi (7,915.33 km) |
