| Cay to Opole | 1,050.51 mi (1,690.63 km) |
| Cay to Orzesze | 999.91 mi (1,609.21 km) |
| Cay to Osowa | 1,242.12 mi (1,999.00 km) |
| Cay to Ostroda | 1,167.27 mi (1,878.53 km) |
| Cay to Ostroleka | 1,096.68 mi (1,764.94 km) |
| Cay to Ostrow Mazowiecka | 1,073.91 mi (1,728.29 km) |
| Cay to Ostrow Wielkopolski | 1,104.77 mi (1,777.95 km) |
| Cay to Ostrowiec Swietokrzyski | 972.84 mi (1,565.64 km) |
| Cay to Ostrzeszow | 1,089.29 mi (1,753.04 km) |
| Cay to Oswiecim | 980.33 mi (1,577.69 km) |
| Cay to Otwock | 1,045.56 mi (1,682.67 km) |
| Cay to Ozarow Mazowiecki | 1,061.68 mi (1,708.61 km) |
| Cay to Ozimek | 1,042.62 mi (1,677.94 km) |
| Cay to Ozorkow | 1,083.18 mi (1,743.21 km) |
| Cay to Pabianice | 1,063.01 mi (1,710.76 km) |
