| Harenkarspel to Olympia Heights (Florida) | 4,624.10 mi (7,441.77 km) |
| Harenkarspel to Omaha (Nebraska) | 4,417.47 mi (7,109.23 km) |
| Harenkarspel to On Top of the World Designated Place (Florida) | 4,527.43 mi (7,286.20 km) |
| Harenkarspel to Onalaska (Wisconsin) | 4,116.88 mi (6,625.48 km) |
| Harenkarspel to Oneida (New York) | 3,585.87 mi (5,770.90 km) |
| Harenkarspel to Oneonta (New York) | 3,591.02 mi (5,779.18 km) |
| Harenkarspel to Ontario (California) | 5,514.82 mi (8,875.24 km) |
| Harenkarspel to Ontario (Oregon) | 4,912.13 mi (7,905.31 km) |
| Harenkarspel to Opa-locka (Florida) | 4,611.52 mi (7,421.53 km) |
| Harenkarspel to Opelika (Alabama) | 4,466.75 mi (7,188.54 km) |
| Harenkarspel to Opelousas (Louisiana) | 4,836.66 mi (7,783.85 km) |
| Harenkarspel to Orange (California) | 5,535.14 mi (8,907.94 km) |
| Harenkarspel to Orange (Texas) | 4,921.83 mi (7,920.91 km) |
| Harenkarspel to Orange City (Florida) | 4,496.12 mi (7,235.80 km) |
| Harenkarspel to Orangeburg (South Carolina) | 4,247.35 mi (6,835.45 km) |
