| Zierikzee to Olympia Heights (Florida) | 4,605.11 mi (7,411.21 km) |
| Zierikzee to Omaha (Nebraska) | 4,430.35 mi (7,129.97 km) |
| Zierikzee to On Top of the World Designated Place (Florida) | 4,513.96 mi (7,264.52 km) |
| Zierikzee to Onalaska (Wisconsin) | 4,128.50 mi (6,644.18 km) |
| Zierikzee to Oneida (New York) | 3,583.13 mi (5,766.49 km) |
| Zierikzee to Oneonta (New York) | 3,586.88 mi (5,772.53 km) |
| Zierikzee to Ontario (California) | 5,541.46 mi (8,918.13 km) |
| Zierikzee to Ontario (Oregon) | 4,945.73 mi (7,959.39 km) |
| Zierikzee to Opa-locka (Florida) | 4,592.62 mi (7,391.12 km) |
| Zierikzee to Opelika (Alabama) | 4,460.21 mi (7,178.01 km) |
| Zierikzee to Opelousas (Louisiana) | 4,834.61 mi (7,780.56 km) |
| Zierikzee to Orange (California) | 5,561.82 mi (8,950.89 km) |
| Zierikzee to Orange (Texas) | 4,921.08 mi (7,919.72 km) |
| Zierikzee to Orange City (Florida) | 4,481.45 mi (7,212.20 km) |
| Zierikzee to Orangeburg (South Carolina) | 4,237.29 mi (6,819.25 km) |
