| Seinajoki to Oestrich-Winkel | 1,044.77 mi (1,681.40 km) |
| Seinajoki to Offenburg | 1,141.67 mi (1,837.34 km) |
| Seinajoki to Oftersheim | 1,072.57 mi (1,726.14 km) |
| Seinajoki to Ohrdruf | 941.47 mi (1,515.15 km) |
| Seinajoki to Ohringen | 1,066.47 mi (1,716.32 km) |
| Seinajoki to Olbernhau | 909.75 mi (1,464.11 km) |
| Seinajoki to Olching | 1,100.61 mi (1,771.26 km) |
| Seinajoki to Oldenburg | 851.30 mi (1,370.04 km) |
| Seinajoki to Oldenburg in Holstein | 725.65 mi (1,167.82 km) |
| Seinajoki to Olfen | 953.58 mi (1,534.63 km) |
| Seinajoki to Olpe | 985.97 mi (1,586.76 km) |
| Seinajoki to Olsberg | 952.28 mi (1,532.55 km) |
| Seinajoki to Oranienburg | 776.69 mi (1,249.96 km) |
| Seinajoki to Ortenberg | 1,002.08 mi (1,612.69 km) |
| Seinajoki to Oschatz | 871.99 mi (1,403.34 km) |
