| Hasselt to Olympia Heights (Florida) | 4,676.25 mi (7,525.70 km) |
| Hasselt to Omaha (Nebraska) | 4,509.21 mi (7,256.87 km) |
| Hasselt to On Top of the World Designated Place (Florida) | 4,587.27 mi (7,382.51 km) |
| Hasselt to Onalaska (Wisconsin) | 4,207.27 mi (6,770.95 km) |
| Hasselt to Oneida (New York) | 3,659.72 mi (5,889.74 km) |
| Hasselt to Oneonta (New York) | 3,663.13 mi (5,895.24 km) |
| Hasselt to Ontario (California) | 5,620.09 mi (9,044.65 km) |
| Hasselt to Ontario (Oregon) | 5,023.31 mi (8,084.23 km) |
| Hasselt to Opa-locka (Florida) | 4,663.81 mi (7,505.67 km) |
| Hasselt to Opelika (Alabama) | 4,535.73 mi (7,299.56 km) |
| Hasselt to Opelousas (Louisiana) | 4,911.25 mi (7,903.89 km) |
| Hasselt to Orange (California) | 5,640.44 mi (9,077.41 km) |
| Hasselt to Orange (Texas) | 4,998.01 mi (8,043.51 km) |
| Hasselt to Orange City (Florida) | 4,554.33 mi (7,329.48 km) |
| Hasselt to Orangeburg (South Carolina) | 4,311.78 mi (6,939.14 km) |
