| Ostrow Wielkopolski to Saarijarvi | 811.86 mi (1,306.56 km) |
| Ostrow Wielkopolski to Salo | 637.01 mi (1,025.17 km) |
| Ostrow Wielkopolski to Sastamala | 696.74 mi (1,121.30 km) |
| Ostrow Wielkopolski to Savonlinna | 818.64 mi (1,317.47 km) |
| Ostrow Wielkopolski to Seinajoki | 791.89 mi (1,274.42 km) |
| Ostrow Wielkopolski to Siilinjarvi | 868.22 mi (1,397.26 km) |
| Ostrow Wielkopolski to Sipoo | 667.24 mi (1,073.82 km) |
| Ostrow Wielkopolski to Sippola | 718.95 mi (1,157.03 km) |
| Ostrow Wielkopolski to Sodankyla | 1,129.26 mi (1,817.37 km) |
| Ostrow Wielkopolski to Somero | 657.78 mi (1,058.59 km) |
| Ostrow Wielkopolski to Sotkamo | 942.94 mi (1,517.52 km) |
| Ostrow Wielkopolski to Tampere | 716.38 mi (1,152.90 km) |
| Ostrow Wielkopolski to Tornio | 1,005.87 mi (1,618.78 km) |
| Ostrow Wielkopolski to Turku | 631.49 mi (1,016.28 km) |
| Ostrow Wielkopolski to Tuusula | 667.12 mi (1,073.62 km) |
