| Prestwick to Olympia Heights (Florida) | 4,220.52 mi (6,792.28 km) |
| Prestwick to Omaha (Nebraska) | 3,993.94 mi (6,427.63 km) |
| Prestwick to On Top of the World Designated Place (Florida) | 4,115.71 mi (6,623.60 km) |
| Prestwick to Onalaska (Wisconsin) | 3,692.87 mi (5,943.09 km) |
| Prestwick to Oneida (New York) | 3,164.20 mi (5,092.29 km) |
| Prestwick to Oneonta (New York) | 3,170.32 mi (5,102.13 km) |
| Prestwick to Ontario (California) | 5,103.43 mi (8,213.18 km) |
| Prestwick to Ontario (Oregon) | 4,512.25 mi (7,261.76 km) |
| Prestwick to Opa-locka (Florida) | 4,207.81 mi (6,771.81 km) |
| Prestwick to Opelika (Alabama) | 4,047.58 mi (6,513.96 km) |
| Prestwick to Opelousas (Louisiana) | 4,414.23 mi (7,104.02 km) |
| Prestwick to Orange (California) | 5,123.80 mi (8,245.96 km) |
| Prestwick to Orange (Texas) | 4,498.72 mi (7,239.98 km) |
| Prestwick to Orange City (Florida) | 4,086.04 mi (6,575.85 km) |
| Prestwick to Orangeburg (South Carolina) | 3,831.74 mi (6,166.59 km) |
