| Port Talbot to Orangevale (California) | 5,150.61 mi (8,289.11 km) |
| Port Talbot to Orchards (Washington) | 4,794.07 mi (7,715.31 km) |
| Port Talbot to Orcutt (California) | 5,342.09 mi (8,597.26 km) |
| Port Talbot to Oregon (Ohio) | 3,649.54 mi (5,873.37 km) |
| Port Talbot to Oregon (Wisconsin) | 3,823.96 mi (6,154.06 km) |
| Port Talbot to Oregon City (Oregon) | 4,815.33 mi (7,749.53 km) |
| Port Talbot to Orem (Utah) | 4,755.61 mi (7,653.42 km) |
| Port Talbot to Orinda (California) | 5,226.03 mi (8,410.49 km) |
| Port Talbot to Orland Park (Illinois) | 3,825.24 mi (6,156.12 km) |
| Port Talbot to Orlando (Florida) | 4,184.50 mi (6,734.30 km) |
| Port Talbot to Ormond Beach (Florida) | 4,133.95 mi (6,652.95 km) |
| Port Talbot to Oro Valley (Arizona) | 5,155.74 mi (8,297.36 km) |
| Port Talbot to Oroville (California) | 5,115.11 mi (8,231.97 km) |
| Port Talbot to Oshkosh (Wisconsin) | 3,743.06 mi (6,023.87 km) |
| Port Talbot to Oskaloosa (Iowa) | 4,023.23 mi (6,474.76 km) |
