| Seinajoki to Oria | 1,555.12 mi (2,502.72 km) |
| Seinajoki to Oristano | 1,687.74 mi (2,716.16 km) |
| Seinajoki to Orta Nova | 1,511.27 mi (2,432.16 km) |
| Seinajoki to Orte | 1,467.25 mi (2,361.31 km) |
| Seinajoki to Ortona | 1,453.31 mi (2,338.88 km) |
| Seinajoki to Orvieto | 1,453.19 mi (2,338.68 km) |
| Seinajoki to Orzinuovi | 1,304.82 mi (2,099.91 km) |
| Seinajoki to Osimo | 1,385.98 mi (2,230.51 km) |
| Seinajoki to Ospitaletto | 1,292.50 mi (2,080.08 km) |
| Seinajoki to Ostuni | 1,539.38 mi (2,477.40 km) |
| Seinajoki to Ottaviano | 1,554.53 mi (2,501.78 km) |
| Seinajoki to Ovada | 1,374.86 mi (2,212.62 km) |
| Seinajoki to Ozieri | 1,636.68 mi (2,633.98 km) |
| Seinajoki to Paceco | 1,768.01 mi (2,845.33 km) |
| Seinajoki to Pachino | 1,831.47 mi (2,947.46 km) |
