| Zollikon to Olympia Heights (Florida) | 4,883.98 mi (7,860.00 km) |
| Zollikon to Omaha (Nebraska) | 4,775.98 mi (7,686.20 km) |
| Zollikon to On Top of the World Designated Place (Florida) | 4,807.99 mi (7,737.71 km) |
| Zollikon to Onalaska (Wisconsin) | 4,472.67 mi (7,198.06 km) |
| Zollikon to Oneida (New York) | 3,903.74 mi (6,282.47 km) |
| Zollikon to Oneonta (New York) | 3,904.64 mi (6,283.92 km) |
| Zollikon to Ontario (California) | 5,900.78 mi (9,496.39 km) |
| Zollikon to Ontario (Oregon) | 5,308.64 mi (8,543.43 km) |
| Zollikon to Opa-locka (Florida) | 4,871.79 mi (7,840.39 km) |
| Zollikon to Opelika (Alabama) | 4,770.98 mi (7,678.15 km) |
| Zollikon to Opelousas (Louisiana) | 5,154.36 mi (8,295.14 km) |
| Zollikon to Orange (California) | 5,921.16 mi (9,529.18 km) |
| Zollikon to Orange (Texas) | 5,243.34 mi (8,438.35 km) |
| Zollikon to Orange City (Florida) | 4,772.45 mi (7,680.51 km) |
| Zollikon to Orangeburg (South Carolina) | 4,540.38 mi (7,307.04 km) |
