| Cassino to Orzesze | 642.47 mi (1,033.96 km) |
| Cassino to Osowa | 918.08 mi (1,477.51 km) |
| Cassino to Ostroda | 889.23 mi (1,431.08 km) |
| Cassino to Ostroleka | 876.33 mi (1,410.31 km) |
| Cassino to Ostrow Mazowiecka | 866.62 mi (1,394.69 km) |
| Cassino to Ostrow Wielkopolski | 726.04 mi (1,168.45 km) |
| Cassino to Ostrowiec Swietokrzyski | 744.52 mi (1,198.19 km) |
| Cassino to Ostrzeszow | 712.13 mi (1,146.06 km) |
| Cassino to Oswiecim | 644.13 mi (1,036.63 km) |
| Cassino to Otwock | 812.41 mi (1,307.44 km) |
| Cassino to Ozarow Mazowiecki | 809.41 mi (1,302.62 km) |
| Cassino to Ozimek | 667.34 mi (1,073.98 km) |
| Cassino to Ozorkow | 767.31 mi (1,234.86 km) |
| Cassino to Pabianice | 748.65 mi (1,204.84 km) |
| Cassino to Parczew | 819.78 mi (1,319.31 km) |
