| Sioux City to Opole | 4,886.98 mi (7,864.83 km) |
| Sioux City to Orzesze | 4,937.65 mi (7,946.38 km) |
| Sioux City to Osowa | 4,721.67 mi (7,598.79 km) |
| Sioux City to Ostroda | 4,800.14 mi (7,725.08 km) |
| Sioux City to Ostroleka | 4,877.50 mi (7,849.57 km) |
| Sioux City to Ostrow Mazowiecka | 4,900.42 mi (7,886.46 km) |
| Sioux City to Ostrow Wielkopolski | 4,835.80 mi (7,782.47 km) |
| Sioux City to Ostrowiec Swietokrzyski | 4,979.59 mi (8,013.88 km) |
| Sioux City to Ostrzeszow | 4,850.64 mi (7,806.35 km) |
| Sioux City to Oswiecim | 4,957.82 mi (7,978.85 km) |
| Sioux City to Otwock | 4,916.30 mi (7,912.02 km) |
| Sioux City to Ozarow Mazowiecki | 4,897.62 mi (7,881.96 km) |
| Sioux City to Ozimek | 4,895.37 mi (7,878.34 km) |
| Sioux City to Ozorkow | 4,864.91 mi (7,829.31 km) |
| Sioux City to Pabianice | 4,883.45 mi (7,859.15 km) |
