| Los Barrios to Olympia Heights (Florida) | 4,387.37 mi (7,060.78 km) |
| Los Barrios to Omaha (Nebraska) | 4,661.05 mi (7,501.23 km) |
| Los Barrios to On Top of the World Designated Place (Florida) | 4,378.71 mi (7,046.86 km) |
| Los Barrios to Onalaska (Wisconsin) | 4,358.85 mi (7,014.88 km) |
| Los Barrios to Oneida (New York) | 3,655.47 mi (5,882.90 km) |
| Los Barrios to Oneonta (New York) | 3,639.93 mi (5,857.90 km) |
| Los Barrios to Ontario (California) | 5,906.98 mi (9,506.36 km) |
| Los Barrios to Ontario (Oregon) | 5,430.69 mi (8,739.85 km) |
| Los Barrios to Opa-locka (Florida) | 4,376.87 mi (7,043.89 km) |
| Los Barrios to Opelika (Alabama) | 4,424.30 mi (7,120.22 km) |
| Los Barrios to Opelousas (Louisiana) | 4,840.35 mi (7,789.79 km) |
| Los Barrios to Orange (California) | 5,927.00 mi (9,538.59 km) |
| Los Barrios to Orange (Texas) | 4,940.34 mi (7,950.71 km) |
| Los Barrios to Orange City (Florida) | 4,331.25 mi (6,970.47 km) |
| Los Barrios to Orangeburg (South Carolina) | 4,165.50 mi (6,703.72 km) |
