| Halikko to Oestrich-Winkel | 928.02 mi (1,493.50 km) |
| Halikko to Offenburg | 1,019.47 mi (1,640.68 km) |
| Halikko to Oftersheim | 950.69 mi (1,529.99 km) |
| Halikko to Ohrdruf | 815.23 mi (1,311.98 km) |
| Halikko to Ohringen | 939.96 mi (1,512.72 km) |
| Halikko to Olbernhau | 770.96 mi (1,240.75 km) |
| Halikko to Olching | 963.73 mi (1,550.98 km) |
| Halikko to Oldenburg | 750.51 mi (1,207.83 km) |
| Halikko to Oldenburg in Holstein | 618.02 mi (994.60 km) |
| Halikko to Olfen | 848.18 mi (1,365.02 km) |
| Halikko to Olpe | 874.63 mi (1,407.58 km) |
| Halikko to Olsberg | 839.40 mi (1,350.89 km) |
| Halikko to Oranienburg | 645.95 mi (1,039.55 km) |
| Halikko to Ortenberg | 881.88 mi (1,419.24 km) |
| Halikko to Oschatz | 736.20 mi (1,184.81 km) |
