| Port Lavaca to Orangeburg (South Carolina) | 990.52 mi (1,594.09 km) |
| Port Lavaca to Orangevale (California) | 1,569.45 mi (2,525.78 km) |
| Port Lavaca to Orchards (Washington) | 1,836.27 mi (2,955.19 km) |
| Port Lavaca to Orcutt (California) | 1,459.18 mi (2,348.32 km) |
| Port Lavaca to Oregon (Ohio) | 1,166.27 mi (1,876.93 km) |
| Port Lavaca to Oregon (Wisconsin) | 1,067.52 mi (1,718.00 km) |
| Port Lavaca to Oregon City (Oregon) | 1,826.61 mi (2,939.64 km) |
| Port Lavaca to Orem (Utah) | 1,175.15 mi (1,891.22 km) |
| Port Lavaca to Orinda (California) | 1,602.33 mi (2,578.70 km) |
| Port Lavaca to Orland Park (Illinois) | 1,023.80 mi (1,647.64 km) |
| Port Lavaca to Orlando (Florida) | 927.46 mi (1,492.60 km) |
| Port Lavaca to Ormond Beach (Florida) | 939.13 mi (1,511.39 km) |
| Port Lavaca to Oro Valley (Arizona) | 892.70 mi (1,436.66 km) |
| Port Lavaca to Oroville (California) | 1,605.56 mi (2,583.90 km) |
| Port Lavaca to Oshkosh (Wisconsin) | 1,153.76 mi (1,856.80 km) |
