| National City to Sugar Hill (Georgia) | 1,900.58 mi (3,058.69 km) |
| National City to Sugar Land (Texas) | 1,284.71 mi (2,067.54 km) |
| National City to Sugarland Run (Virginia) | 2,249.34 mi (3,619.97 km) |
| National City to Sugarmill Woods (Florida) | 2,064.27 mi (3,322.12 km) |
| National City to Suisun City (California) | 474.30 mi (763.31 km) |
| National City to Suitland (Maryland) | 2,274.05 mi (3,659.72 km) |
| National City to Sulphur (Louisiana) | 1,406.59 mi (2,263.68 km) |
| National City to Sulphur Springs (Texas) | 1,244.65 mi (2,003.08 km) |
| National City to Summerfield (Maryland) | 2,276.87 mi (3,664.27 km) |
| National City to Summerfield (North Carolina) | 2,120.93 mi (3,413.30 km) |
| National City to Summerlin South (Nevada) | 259.31 mi (417.31 km) |
| National City to Summerville (South Carolina) | 2,132.23 mi (3,431.49 km) |
| National City to Summit (Illinois) | 1,719.53 mi (2,767.32 km) |
| National City to Summit (New Jersey) | 2,407.23 mi (3,874.07 km) |
| National City to Sumner (Washington) | 1,041.09 mi (1,675.48 km) |
