| Planken to Olympia Heights (Florida) | 4,929.97 mi (7,934.03 km) |
| Planken to Omaha (Nebraska) | 4,817.63 mi (7,753.23 km) |
| Planken to On Top of the World Designated Place (Florida) | 4,853.67 mi (7,811.23 km) |
| Planken to Onalaska (Wisconsin) | 4,514.53 mi (7,265.44 km) |
| Planken to Oneida (New York) | 3,948.09 mi (6,353.84 km) |
| Planken to Oneonta (New York) | 3,949.19 mi (6,355.60 km) |
| Planken to Ontario (California) | 5,938.81 mi (9,557.60 km) |
| Planken to Ontario (Oregon) | 5,344.16 mi (8,600.60 km) |
| Planken to Opa-locka (Florida) | 4,917.78 mi (7,914.41 km) |
| Planken to Opelika (Alabama) | 4,816.00 mi (7,750.60 km) |
| Planken to Opelousas (Louisiana) | 5,198.86 mi (8,366.76 km) |
| Planken to Orange (California) | 5,959.18 mi (9,590.38 km) |
| Planken to Orange (Texas) | 5,287.68 mi (8,509.69 km) |
| Planken to Orange City (Florida) | 4,818.21 mi (7,754.16 km) |
| Planken to Orangeburg (South Carolina) | 4,585.74 mi (7,380.03 km) |
