| Llanelli to Odessa (Texas) | 4,847.32 mi (7,801.01 km) |
| Llanelli to Ogden (Utah) | 4,698.75 mi (7,561.90 km) |
| Llanelli to Oildale (California) | 5,249.19 mi (8,447.76 km) |
| Llanelli to Ojus (Florida) | 4,244.13 mi (6,830.26 km) |
| Llanelli to Okemos (Michigan) | 3,624.73 mi (5,833.44 km) |
| Llanelli to Oklahoma City (Oklahoma) | 4,477.38 mi (7,205.65 km) |
| Llanelli to Okmulgee (Oklahoma) | 4,411.85 mi (7,100.19 km) |
| Llanelli to Olathe (Kansas) | 4,204.82 mi (6,767.00 km) |
| Llanelli to Old Jamestown (Missouri) | 4,031.64 mi (6,488.30 km) |
| Llanelli to Oldsmar (Florida) | 4,245.52 mi (6,832.50 km) |
| Llanelli to Olean (New York) | 3,414.16 mi (5,494.56 km) |
| Llanelli to Olive Branch (Mississippi) | 4,201.00 mi (6,760.85 km) |
| Llanelli to Olivehurst (California) | 5,123.05 mi (8,244.76 km) |
| Llanelli to Olney (Maryland) | 3,486.33 mi (5,610.71 km) |
| Llanelli to Olympia (Washington) | 4,713.30 mi (7,585.33 km) |
