| Serris to Orzesze | 720.44 mi (1,159.43 km) |
| Serris to Osowa | 772.42 mi (1,243.10 km) |
| Serris to Ostroda | 811.79 mi (1,306.46 km) |
| Serris to Ostroleka | 864.47 mi (1,391.23 km) |
| Serris to Ostrow Mazowiecka | 874.47 mi (1,407.33 km) |
| Serris to Ostrow Wielkopolski | 690.07 mi (1,110.55 km) |
| Serris to Ostrowiec Swietokrzyski | 838.49 mi (1,349.41 km) |
| Serris to Ostrzeszow | 692.34 mi (1,114.22 km) |
| Serris to Oswiecim | 741.27 mi (1,192.95 km) |
| Serris to Otwock | 840.48 mi (1,352.63 km) |
| Serris to Ozarow Mazowiecki | 821.98 mi (1,322.85 km) |
| Serris to Ozimek | 698.50 mi (1,124.13 km) |
| Serris to Ozorkow | 755.62 mi (1,216.05 km) |
| Serris to Pabianice | 756.37 mi (1,217.25 km) |
| Serris to Parczew | 904.70 mi (1,455.97 km) |
