| Port Lavaca to Odenton (Maryland) | 1,347.99 mi (2,169.39 km) |
| Port Lavaca to Odessa (Texas) | 408.83 mi (657.95 km) |
| Port Lavaca to Ogden (Utah) | 1,226.91 mi (1,974.52 km) |
| Port Lavaca to Oildale (California) | 1,390.34 mi (2,237.54 km) |
| Port Lavaca to Ojus (Florida) | 1,026.87 mi (1,652.58 km) |
| Port Lavaca to Okemos (Michigan) | 1,187.82 mi (1,911.61 km) |
| Port Lavaca to Oklahoma City (Oklahoma) | 476.08 mi (766.18 km) |
| Port Lavaca to Okmulgee (Oklahoma) | 484.69 mi (780.03 km) |
| Port Lavaca to Olathe (Kansas) | 716.77 mi (1,153.53 km) |
| Port Lavaca to Old Jamestown (Missouri) | 794.19 mi (1,278.13 km) |
| Port Lavaca to Oldsmar (Florida) | 849.29 mi (1,366.79 km) |
| Port Lavaca to Olean (New York) | 1,379.02 mi (2,219.31 km) |
| Port Lavaca to Olive Branch (Mississippi) | 591.82 mi (952.45 km) |
| Port Lavaca to Olivehurst (California) | 1,595.37 mi (2,567.50 km) |
| Port Lavaca to Olney (Maryland) | 1,332.41 mi (2,144.31 km) |
