| Helsinki to Oestrich-Winkel | 965.32 mi (1,553.54 km) |
| Helsinki to Offenburg | 1,053.63 mi (1,695.66 km) |
| Helsinki to Oftersheim | 985.34 mi (1,585.75 km) |
| Helsinki to Ohrdruf | 848.30 mi (1,365.21 km) |
| Helsinki to Ohringen | 972.17 mi (1,564.55 km) |
| Helsinki to Olbernhau | 796.46 mi (1,281.77 km) |
| Helsinki to Olching | 989.42 mi (1,592.32 km) |
| Helsinki to Oldenburg | 795.67 mi (1,280.50 km) |
| Helsinki to Oldenburg in Holstein | 661.62 mi (1,064.78 km) |
| Helsinki to Olfen | 890.92 mi (1,433.79 km) |
| Helsinki to Olpe | 914.71 mi (1,472.09 km) |
| Helsinki to Olsberg | 879.01 mi (1,414.63 km) |
| Helsinki to Oranienburg | 677.80 mi (1,090.81 km) |
| Helsinki to Ortenberg | 917.74 mi (1,476.96 km) |
| Helsinki to Oschatz | 764.04 mi (1,229.60 km) |
