| Katy to Oberkirch | 5,283.13 mi (8,502.38 km) |
| Katy to Obernburg am Main | 5,279.06 mi (8,495.83 km) |
| Katy to Obernkirchen | 5,194.03 mi (8,358.98 km) |
| Katy to Oberschleissheim | 5,430.02 mi (8,738.78 km) |
| Katy to Oberstdorf | 5,410.13 mi (8,706.76 km) |
| Katy to Obertraubling | 5,426.59 mi (8,733.24 km) |
| Katy to Obertshausen | 5,259.34 mi (8,464.08 km) |
| Katy to Oberursel | 5,244.78 mi (8,440.66 km) |
| Katy to Ochsenfurt | 5,321.28 mi (8,563.77 km) |
| Katy to Ochsenhausen | 5,373.11 mi (8,647.19 km) |
| Katy to Ochtrup | 5,124.86 mi (8,247.67 km) |
| Katy to Odenthal | 5,160.88 mi (8,305.64 km) |
| Katy to Oelde | 5,173.02 mi (8,325.17 km) |
| Katy to Oelsnitz | 5,372.71 mi (8,646.54 km) |
| Katy to Oer-Erkenschwick | 5,145.75 mi (8,281.29 km) |
