| Chiclana de la Frontera to Olympia Heights (Florida) | 4,347.51 mi (6,996.64 km) |
| Chiclana de la Frontera to Omaha (Nebraska) | 4,621.44 mi (7,437.49 km) |
| Chiclana de la Frontera to On Top of the World Designated Place (Florida) | 4,338.44 mi (6,982.05 km) |
| Chiclana de la Frontera to Onalaska (Wisconsin) | 4,319.35 mi (6,951.33 km) |
| Chiclana de la Frontera to Oneida (New York) | 3,615.28 mi (5,818.23 km) |
| Chiclana de la Frontera to Oneonta (New York) | 3,599.67 mi (5,793.11 km) |
| Chiclana de la Frontera to Ontario (California) | 5,868.06 mi (9,443.73 km) |
| Chiclana de la Frontera to Ontario (Oregon) | 5,393.52 mi (8,680.03 km) |
| Chiclana de la Frontera to Opa-locka (Florida) | 4,336.99 mi (6,979.72 km) |
| Chiclana de la Frontera to Opelika (Alabama) | 4,383.83 mi (7,055.09 km) |
| Chiclana de la Frontera to Opelousas (Louisiana) | 4,799.87 mi (7,724.65 km) |
| Chiclana de la Frontera to Orange (California) | 5,888.08 mi (9,475.95 km) |
| Chiclana de la Frontera to Orange (Texas) | 4,899.86 mi (7,885.57 km) |
| Chiclana de la Frontera to Orange City (Florida) | 4,291.03 mi (6,905.74 km) |
| Chiclana de la Frontera to Orangeburg (South Carolina) | 4,125.05 mi (6,638.62 km) |
