| Amarillo to Oberkirch | 5,227.86 mi (8,413.43 km) |
| Amarillo to Obernburg am Main | 5,210.38 mi (8,385.29 km) |
| Amarillo to Obernkirchen | 5,107.06 mi (8,219.02 km) |
| Amarillo to Oberschleissheim | 5,364.83 mi (8,633.86 km) |
| Amarillo to Oberstdorf | 5,355.68 mi (8,619.14 km) |
| Amarillo to Obertraubling | 5,354.06 mi (8,616.53 km) |
| Amarillo to Obertshausen | 5,189.95 mi (8,352.42 km) |
| Amarillo to Oberursel | 5,175.19 mi (8,328.67 km) |
| Amarillo to Ochsenfurt | 5,250.94 mi (8,450.57 km) |
| Amarillo to Ochsenhausen | 5,314.92 mi (8,553.54 km) |
| Amarillo to Ochtrup | 5,044.24 mi (8,117.92 km) |
| Amarillo to Odenthal | 5,089.57 mi (8,190.87 km) |
| Amarillo to Oelde | 5,092.34 mi (8,195.33 km) |
| Amarillo to Oelsnitz | 5,289.62 mi (8,512.82 km) |
| Amarillo to Oer-Erkenschwick | 5,069.31 mi (8,158.27 km) |
