| Seinajoki to Oegstgeest | 994.44 mi (1,600.40 km) |
| Seinajoki to Oirschot | 1,013.50 mi (1,631.06 km) |
| Seinajoki to Oisterwijk | 1,011.02 mi (1,627.08 km) |
| Seinajoki to Oldebroek | 944.70 mi (1,520.35 km) |
| Seinajoki to Oldenzaal | 928.34 mi (1,494.02 km) |
| Seinajoki to Ommen | 928.71 mi (1,494.61 km) |
| Seinajoki to Oosterend | 909.33 mi (1,463.43 km) |
| Seinajoki to Oosterhout | 1,015.71 mi (1,634.63 km) |
| Seinajoki to Oosterwolde | 904.68 mi (1,455.95 km) |
| Seinajoki to Oostzaan | 970.16 mi (1,561.32 km) |
| Seinajoki to Opmeer | 953.58 mi (1,534.63 km) |
| Seinajoki to Oss | 992.98 mi (1,598.05 km) |
| Seinajoki to Oud-Beijerland | 1,016.80 mi (1,636.38 km) |
| Seinajoki to Oudenbosch | 1,026.78 mi (1,652.44 km) |
| Seinajoki to Oudewater | 994.13 mi (1,599.89 km) |
