| San Cugat del Valles to Olympia Heights (Florida) | 4,690.49 mi (7,548.62 km) |
| San Cugat del Valles to Omaha (Nebraska) | 4,773.03 mi (7,681.45 km) |
| San Cugat del Valles to On Top of the World Designated Place (Florida) | 4,648.08 mi (7,480.36 km) |
| San Cugat del Valles to Onalaska (Wisconsin) | 4,467.05 mi (7,189.02 km) |
| San Cugat del Valles to Oneida (New York) | 3,824.78 mi (6,155.38 km) |
| San Cugat del Valles to Oneonta (New York) | 3,817.53 mi (6,143.72 km) |
| San Cugat del Valles to Ontario (California) | 5,968.14 mi (9,604.79 km) |
| San Cugat del Valles to Ontario (Oregon) | 5,427.01 mi (8,733.92 km) |
| San Cugat del Valles to Opa-locka (Florida) | 4,679.07 mi (7,530.23 km) |
| San Cugat del Valles to Opelika (Alabama) | 4,652.40 mi (7,487.32 km) |
| San Cugat del Valles to Opelousas (Louisiana) | 5,055.76 mi (8,136.46 km) |
| San Cugat del Valles to Orange (California) | 5,988.53 mi (9,637.61 km) |
| San Cugat del Valles to Orange (Texas) | 5,151.08 mi (8,289.86 km) |
| San Cugat del Valles to Orange City (Florida) | 4,606.18 mi (7,412.93 km) |
| San Cugat del Valles to Orangeburg (South Carolina) | 4,405.40 mi (7,089.80 km) |
