| Westervoort to Olympia Heights (Florida) | 4,685.40 mi (7,540.42 km) |
| Westervoort to Omaha (Nebraska) | 4,489.30 mi (7,224.84 km) |
| Westervoort to On Top of the World Designated Place (Florida) | 4,591.28 mi (7,388.96 km) |
| Westervoort to Onalaska (Wisconsin) | 4,188.48 mi (6,740.70 km) |
| Westervoort to Oneida (New York) | 3,653.74 mi (5,880.13 km) |
| Westervoort to Oneonta (New York) | 3,658.42 mi (5,887.66 km) |
| Westervoort to Ontario (California) | 5,588.02 mi (8,993.05 km) |
| Westervoort to Ontario (Oregon) | 4,985.19 mi (8,022.89 km) |
| Westervoort to Opa-locka (Florida) | 4,672.87 mi (7,520.26 km) |
| Westervoort to Opelika (Alabama) | 4,533.36 mi (7,295.74 km) |
| Westervoort to Opelousas (Louisiana) | 4,904.84 mi (7,893.57 km) |
| Westervoort to Orange (California) | 5,608.34 mi (9,025.75 km) |
| Westervoort to Orange (Texas) | 4,990.42 mi (8,031.30 km) |
| Westervoort to Orange City (Florida) | 4,559.44 mi (7,337.71 km) |
| Westervoort to Orangeburg (South Carolina) | 4,312.60 mi (6,940.46 km) |
