| Plock to Olympia Heights (Florida) | 5,221.84 mi (8,403.74 km) |
| Plock to Omaha (Nebraska) | 4,908.09 mi (7,898.81 km) |
| Plock to On Top of the World Designated Place (Florida) | 5,112.13 mi (8,227.18 km) |
| Plock to Onalaska (Wisconsin) | 4,615.28 mi (7,427.58 km) |
| Plock to Oneida (New York) | 4,142.40 mi (6,666.55 km) |
| Plock to Oneonta (New York) | 4,151.99 mi (6,681.98 km) |
| Plock to Ontario (California) | 5,925.02 mi (9,535.40 km) |
| Plock to Ontario (Oregon) | 5,284.73 mi (8,504.96 km) |
| Plock to Opa-locka (Florida) | 5,209.08 mi (8,383.21 km) |
| Plock to Opelika (Alabama) | 5,031.77 mi (8,097.86 km) |
| Plock to Opelousas (Louisiana) | 5,385.43 mi (8,667.00 km) |
| Plock to Orange (California) | 5,944.94 mi (9,567.46 km) |
| Plock to Orange (Texas) | 5,465.58 mi (8,796.00 km) |
| Plock to Orange City (Florida) | 5,083.96 mi (8,181.84 km) |
| Plock to Orangeburg (South Carolina) | 4,823.57 mi (7,762.79 km) |
