| Oristano to Orzesze | 862.62 mi (1,388.25 km) |
| Oristano to Osowa | 1,102.97 mi (1,775.06 km) |
| Oristano to Ostroda | 1,091.39 mi (1,756.41 km) |
| Oristano to Ostroleka | 1,095.34 mi (1,762.77 km) |
| Oristano to Ostrow Mazowiecka | 1,090.06 mi (1,754.28 km) |
| Oristano to Ostrow Wielkopolski | 923.51 mi (1,486.25 km) |
| Oristano to Ostrowiec Swietokrzyski | 980.15 mi (1,577.40 km) |
| Oristano to Ostrzeszow | 912.67 mi (1,468.80 km) |
| Oristano to Oswiecim | 869.98 mi (1,400.10 km) |
| Oristano to Otwock | 1,036.85 mi (1,668.65 km) |
| Oristano to Ozarow Mazowiecki | 1,029.49 mi (1,656.80 km) |
| Oristano to Ozimek | 877.11 mi (1,411.56 km) |
| Oristano to Ozorkow | 976.66 mi (1,571.79 km) |
| Oristano to Pabianice | 961.52 mi (1,547.41 km) |
| Oristano to Parczew | 1,059.13 mi (1,704.51 km) |
