| Hallstahammar to Oerlinghausen | 604.23 mi (972.42 km) |
| Hallstahammar to Oestrich-Winkel | 739.93 mi (1,190.81 km) |
| Hallstahammar to Offenburg | 839.53 mi (1,351.09 km) |
| Hallstahammar to Oftersheim | 770.69 mi (1,240.30 km) |
| Hallstahammar to Ohrdruf | 644.45 mi (1,037.14 km) |
| Hallstahammar to Ohringen | 768.26 mi (1,236.40 km) |
| Hallstahammar to Olbernhau | 628.86 mi (1,012.06 km) |
| Hallstahammar to Olching | 813.42 mi (1,309.07 km) |
| Hallstahammar to Oldenburg | 541.88 mi (872.07 km) |
| Hallstahammar to Oldenburg in Holstein | 419.00 mi (674.32 km) |
| Hallstahammar to Olfen | 644.79 mi (1,037.69 km) |
| Hallstahammar to Olpe | 678.94 mi (1,092.64 km) |
| Hallstahammar to Olsberg | 646.09 mi (1,039.78 km) |
| Hallstahammar to Oranienburg | 487.96 mi (785.30 km) |
| Hallstahammar to Ortenberg | 699.61 mi (1,125.91 km) |
