| Llanelli to Scottsboro (Alabama) | 4,062.73 mi (6,538.33 km) |
| Llanelli to Scottsdale (Arizona) | 5,101.84 mi (8,210.62 km) |
| Llanelli to Scranton (Pennsylvania) | 3,330.70 mi (5,360.25 km) |
| Llanelli to Seabrook (Maryland) | 3,484.57 mi (5,607.87 km) |
| Llanelli to Seabrook (Texas) | 4,678.91 mi (7,529.98 km) |
| Llanelli to Seaford (New York) | 3,272.70 mi (5,266.90 km) |
| Llanelli to Seagoville (Texas) | 4,582.25 mi (7,374.42 km) |
| Llanelli to Seal Beach (California) | 5,311.71 mi (8,548.37 km) |
| Llanelli to Searcy (Arkansas) | 4,262.60 mi (6,860.00 km) |
| Llanelli to Seaside (California) | 5,270.87 mi (8,482.64 km) |
| Llanelli to SeaTac (Washington) | 4,674.32 mi (7,522.59 km) |
| Llanelli to Seattle (Washington) | 4,665.19 mi (7,507.89 km) |
| Llanelli to Sebastian (Florida) | 4,166.37 mi (6,705.12 km) |
| Llanelli to Sebring (Florida) | 4,222.73 mi (6,795.83 km) |
| Llanelli to Secaucus (New Jersey) | 3,291.56 mi (5,297.26 km) |
