| Knightdale to Oberkirch | 4,280.15 mi (6,888.24 km) |
| Knightdale to Obernburg am Main | 4,288.07 mi (6,900.98 km) |
| Knightdale to Obernkirchen | 4,222.04 mi (6,794.71 km) |
| Knightdale to Oberschleissheim | 4,433.63 mi (7,135.25 km) |
| Knightdale to Oberstdorf | 4,404.70 mi (7,088.68 km) |
| Knightdale to Obertraubling | 4,436.88 mi (7,140.48 km) |
| Knightdale to Obertshausen | 4,269.29 mi (6,870.77 km) |
| Knightdale to Oberursel | 4,255.15 mi (6,848.01 km) |
| Knightdale to Ochsenfurt | 4,331.17 mi (6,970.34 km) |
| Knightdale to Ochsenhausen | 4,371.39 mi (7,035.08 km) |
| Knightdale to Ochtrup | 4,147.76 mi (6,675.17 km) |
| Knightdale to Odenthal | 4,174.20 mi (6,717.72 km) |
| Knightdale to Oelde | 4,195.13 mi (6,751.41 km) |
| Knightdale to Oelsnitz | 4,393.85 mi (7,071.21 km) |
| Knightdale to Oer-Erkenschwick | 4,164.21 mi (6,701.64 km) |
