| Senec to Opole | 170.82 mi (274.90 km) |
| Senec to Orzesze | 146.69 mi (236.08 km) |
| Senec to Osowa | 431.42 mi (694.31 km) |
| Senec to Ostroda | 394.77 mi (635.32 km) |
| Senec to Ostroleka | 381.33 mi (613.69 km) |
| Senec to Ostrow Mazowiecka | 373.05 mi (600.36 km) |
| Senec to Ostrow Wielkopolski | 237.75 mi (382.62 km) |
| Senec to Ostrowiec Swietokrzyski | 259.34 mi (417.37 km) |
| Senec to Ostrzeszow | 222.22 mi (357.63 km) |
| Senec to Oswiecim | 150.27 mi (241.83 km) |
| Senec to Otwock | 318.99 mi (513.36 km) |
| Senec to Ozarow Mazowiecki | 314.40 mi (505.97 km) |
| Senec to Ozimek | 173.46 mi (279.15 km) |
| Senec to Ozorkow | 272.05 mi (437.82 km) |
| Senec to Pabianice | 252.92 mi (407.04 km) |
