| Penarth to Somersworth (New Hampshire) | 3,104.55 mi (4,996.30 km) |
| Penarth to Somerton (Arizona) | 5,305.79 mi (8,538.84 km) |
| Penarth to Somerville (Massachusetts) | 3,148.15 mi (5,066.45 km) |
| Penarth to Somerville (New Jersey) | 3,368.84 mi (5,421.63 km) |
| Penarth to Sonoma (California) | 5,238.27 mi (8,430.18 km) |
| Penarth to Soquel (California) | 5,296.47 mi (8,523.84 km) |
| Penarth to South Bend (Indiana) | 3,789.28 mi (6,098.26 km) |
| Penarth to South Bradenton (Florida) | 4,316.33 mi (6,946.46 km) |
| Penarth to South Burlington (Vermont) | 3,151.78 mi (5,072.29 km) |
| Penarth to South Charleston (West Virginia) | 3,758.60 mi (6,048.88 km) |
| Penarth to South Daytona (Florida) | 4,165.03 mi (6,702.97 km) |
| Penarth to South El Monte (California) | 5,338.51 mi (8,591.50 km) |
| Penarth to South Elgin (Illinois) | 3,854.40 mi (6,203.06 km) |
| Penarth to South Euclid (Ohio) | 3,608.54 mi (5,807.38 km) |
| Penarth to South Farmingdale (New York) | 3,314.55 mi (5,334.25 km) |
