| Katy to Oerlinghausen | 5,187.67 mi (8,348.75 km) |
| Katy to Oestrich-Winkel | 5,229.56 mi (8,416.16 km) |
| Katy to Offenburg | 5,279.47 mi (8,496.49 km) |
| Katy to Oftersheim | 5,273.87 mi (8,487.48 km) |
| Katy to Ohrdruf | 5,304.32 mi (8,536.47 km) |
| Katy to Ohringen | 5,315.41 mi (8,554.32 km) |
| Katy to Olbernhau | 5,406.44 mi (8,700.82 km) |
| Katy to Olching | 5,422.14 mi (8,726.08 km) |
| Katy to Oldenburg | 5,131.28 mi (8,258.00 km) |
| Katy to Oldenburg in Holstein | 5,186.24 mi (8,346.45 km) |
| Katy to Olfen | 5,148.26 mi (8,285.32 km) |
| Katy to Olpe | 5,188.68 mi (8,350.38 km) |
| Katy to Olsberg | 5,201.89 mi (8,371.63 km) |
| Katy to Oranienburg | 5,324.57 mi (8,569.07 km) |
| Katy to Ortenberg | 5,257.78 mi (8,461.58 km) |
