| Prostejov to Olympia Heights (Florida) | 5,201.70 mi (8,371.33 km) |
| Prostejov to Omaha (Nebraska) | 4,974.17 mi (8,005.15 km) |
| Prostejov to On Top of the World Designated Place (Florida) | 5,107.19 mi (8,219.23 km) |
| Prostejov to Onalaska (Wisconsin) | 4,676.37 mi (7,525.89 km) |
| Prostejov to Oneida (New York) | 4,163.11 mi (6,699.87 km) |
| Prostejov to Oneonta (New York) | 4,169.07 mi (6,709.47 km) |
| Prostejov to Ontario (California) | 6,033.87 mi (9,710.57 km) |
| Prostejov to Ontario (Oregon) | 5,408.44 mi (8,704.05 km) |
| Prostejov to Opa-locka (Florida) | 5,189.18 mi (8,351.19 km) |
| Prostejov to Opelika (Alabama) | 5,045.73 mi (8,120.32 km) |
| Prostejov to Opelousas (Louisiana) | 5,412.99 mi (8,711.36 km) |
| Prostejov to Orange (California) | 6,054.00 mi (9,742.97 km) |
| Prostejov to Orange (Texas) | 5,497.06 mi (8,846.66 km) |
| Prostejov to Orange City (Florida) | 5,075.62 mi (8,168.42 km) |
| Prostejov to Orangeburg (South Carolina) | 4,827.21 mi (7,768.65 km) |
