| Santiago de Compostela to Olympia Heights (Florida) | 4,138.31 mi (6,659.97 km) |
| Santiago de Compostela to Omaha (Nebraska) | 4,269.28 mi (6,870.75 km) |
| Santiago de Compostela to On Top of the World Designated Place (Florida) | 4,098.67 mi (6,596.17 km) |
| Santiago de Compostela to Onalaska (Wisconsin) | 3,964.13 mi (6,379.65 km) |
| Santiago de Compostela to Oneida (New York) | 3,296.58 mi (5,305.33 km) |
| Santiago de Compostela to Oneonta (New York) | 3,286.70 mi (5,289.42 km) |
| Santiago de Compostela to Ontario (California) | 5,491.60 mi (8,837.88 km) |
| Santiago de Compostela to Ontario (Oregon) | 4,986.03 mi (8,024.23 km) |
| Santiago de Compostela to Opa-locka (Florida) | 4,126.92 mi (6,641.63 km) |
| Santiago de Compostela to Opelika (Alabama) | 4,110.09 mi (6,614.55 km) |
| Santiago de Compostela to Opelousas (Louisiana) | 4,517.06 mi (7,269.51 km) |
| Santiago de Compostela to Orange (California) | 5,511.85 mi (8,870.47 km) |
| Santiago de Compostela to Orange (Texas) | 4,613.73 mi (7,425.08 km) |
| Santiago de Compostela to Orange City (Florida) | 4,056.08 mi (6,527.63 km) |
| Santiago de Compostela to Orangeburg (South Carolina) | 3,860.31 mi (6,212.56 km) |
