| Sioux City to Benavente | 4,375.33 mi (7,041.41 km) |
| Sioux City to Bombarral | 4,347.86 mi (6,997.20 km) |
| Sioux City to Bougado | 4,294.25 mi (6,910.93 km) |
| Sioux City to Braga | 4,292.11 mi (6,907.48 km) |
| Sioux City to Braganca | 4,353.44 mi (7,006.18 km) |
| Sioux City to Cabeceiras de Basto | 4,310.13 mi (6,936.48 km) |
| Sioux City to Cacem | 4,360.44 mi (7,017.46 km) |
| Sioux City to Cadaval | 4,351.66 mi (7,003.31 km) |
| Sioux City to Caldas da Rainha | 4,343.32 mi (6,989.90 km) |
| Sioux City to Calheta | 4,231.10 mi (6,809.30 km) |
| Sioux City to Camara de Lobos | 4,241.30 mi (6,825.71 km) |
| Sioux City to Canico | 4,249.54 mi (6,838.97 km) |
| Sioux City to Cantanhede | 4,330.78 mi (6,969.72 km) |
| Sioux City to Carregal do Sal | 4,353.30 mi (7,005.96 km) |
| Sioux City to Cartaxo | 4,368.91 mi (7,031.08 km) |
