| Amstetten to Olympia Heights (Florida) | 5,141.96 mi (8,275.19 km) |
| Amstetten to Omaha (Nebraska) | 4,963.03 mi (7,987.22 km) |
| Amstetten to On Top of the World Designated Place (Florida) | 5,055.66 mi (8,136.29 km) |
| Amstetten to Onalaska (Wisconsin) | 4,662.82 mi (7,504.08 km) |
| Amstetten to Oneida (New York) | 4,127.38 mi (6,642.37 km) |
| Amstetten to Oneonta (New York) | 4,131.30 mi (6,648.69 km) |
| Amstetten to Ontario (California) | 6,047.38 mi (9,732.32 km) |
| Amstetten to Ontario (Oregon) | 5,432.60 mi (8,742.92 km) |
| Amstetten to Opa-locka (Florida) | 5,129.59 mi (8,255.27 km) |
| Amstetten to Opelika (Alabama) | 5,004.57 mi (8,054.08 km) |
| Amstetten to Opelousas (Louisiana) | 5,378.78 mi (8,656.31 km) |
| Amstetten to Orange (California) | 6,067.62 mi (9,764.90 km) |
| Amstetten to Orange (Texas) | 5,464.92 mi (8,794.94 km) |
| Amstetten to Orange City (Florida) | 5,022.32 mi (8,082.64 km) |
| Amstetten to Orangeburg (South Carolina) | 4,780.79 mi (7,693.93 km) |
