| Hammond to Oerlinghausen | 4,264.76 mi (6,863.47 km) |
| Hammond to Oestrich-Winkel | 4,313.72 mi (6,942.26 km) |
| Hammond to Offenburg | 4,369.25 mi (7,031.63 km) |
| Hammond to Oftersheim | 4,359.41 mi (7,015.79 km) |
| Hammond to Ohrdruf | 4,382.39 mi (7,052.77 km) |
| Hammond to Ohringen | 4,400.24 mi (7,081.50 km) |
| Hammond to Olbernhau | 4,481.92 mi (7,212.96 km) |
| Hammond to Olching | 4,507.70 mi (7,254.44 km) |
| Hammond to Oldenburg | 4,205.50 mi (6,768.10 km) |
| Hammond to Oldenburg in Holstein | 4,255.33 mi (6,848.29 km) |
| Hammond to Olfen | 4,227.53 mi (6,803.56 km) |
| Hammond to Olpe | 4,269.66 mi (6,871.35 km) |
| Hammond to Olsberg | 4,281.04 mi (6,889.67 km) |
| Hammond to Oranienburg | 4,395.08 mi (7,073.19 km) |
| Hammond to Ortenberg | 4,339.37 mi (6,983.54 km) |
