| Port Talbot to Odessa (Texas) | 4,864.18 mi (7,828.14 km) |
| Port Talbot to Ogden (Utah) | 4,714.90 mi (7,587.90 km) |
| Port Talbot to Oildale (California) | 5,265.27 mi (8,473.63 km) |
| Port Talbot to Ojus (Florida) | 4,260.40 mi (6,856.45 km) |
| Port Talbot to Okemos (Michigan) | 3,641.63 mi (5,860.64 km) |
| Port Talbot to Oklahoma City (Oklahoma) | 4,494.25 mi (7,232.80 km) |
| Port Talbot to Okmulgee (Oklahoma) | 4,428.74 mi (7,127.36 km) |
| Port Talbot to Olathe (Kansas) | 4,221.67 mi (6,794.12 km) |
| Port Talbot to Old Jamestown (Missouri) | 4,048.54 mi (6,515.49 km) |
| Port Talbot to Oldsmar (Florida) | 4,262.04 mi (6,859.09 km) |
| Port Talbot to Olean (New York) | 3,431.05 mi (5,521.74 km) |
| Port Talbot to Olive Branch (Mississippi) | 4,217.89 mi (6,788.05 km) |
| Port Talbot to Olivehurst (California) | 5,138.74 mi (8,270.00 km) |
| Port Talbot to Olney (Maryland) | 3,503.14 mi (5,637.75 km) |
| Port Talbot to Olympia (Washington) | 4,728.28 mi (7,609.43 km) |
