| Horgen to Olympia Heights (Florida) | 4,886.51 mi (7,864.07 km) |
| Horgen to Omaha (Nebraska) | 4,780.05 mi (7,692.75 km) |
| Horgen to On Top of the World Designated Place (Florida) | 4,810.83 mi (7,742.28 km) |
| Horgen to Onalaska (Wisconsin) | 4,476.70 mi (7,204.54 km) |
| Horgen to Oneida (New York) | 3,907.19 mi (6,288.01 km) |
| Horgen to Oneonta (New York) | 3,908.03 mi (6,289.36 km) |
| Horgen to Ontario (California) | 5,905.33 mi (9,503.71 km) |
| Horgen to Ontario (Oregon) | 5,313.42 mi (8,551.12 km) |
| Horgen to Opa-locka (Florida) | 4,874.33 mi (7,844.47 km) |
| Horgen to Opelika (Alabama) | 4,774.18 mi (7,683.30 km) |
| Horgen to Opelousas (Louisiana) | 5,157.75 mi (8,300.60 km) |
| Horgen to Orange (California) | 5,925.71 mi (9,536.51 km) |
| Horgen to Orange (Texas) | 5,246.79 mi (8,443.89 km) |
| Horgen to Orange City (Florida) | 4,775.22 mi (7,684.98 km) |
| Horgen to Orangeburg (South Carolina) | 4,543.42 mi (7,311.93 km) |
