| Rio Grande City to Sumter (South Carolina) | 1,215.95 mi (1,956.89 km) |
| Rio Grande City to Sun City (Arizona) | 946.67 mi (1,523.52 km) |
| Rio Grande City to Sun City Center (Florida) | 1,016.59 mi (1,636.05 km) |
| Rio Grande City to Sun City West (Arizona) | 952.23 mi (1,532.46 km) |
| Rio Grande City to Sun Lakes (Arizona) | 912.71 mi (1,468.87 km) |
| Rio Grande City to Sun Prairie (Wisconsin) | 1,279.88 mi (2,059.77 km) |
| Rio Grande City to Sun Valley (Nevada) | 1,513.40 mi (2,435.58 km) |
| Rio Grande City to Sun Village (California) | 1,268.89 mi (2,042.09 km) |
| Rio Grande City to Sunland Park (New Mexico) | 600.94 mi (967.12 km) |
| Rio Grande City to Sunny Isles Beach (Florida) | 1,158.90 mi (1,865.06 km) |
| Rio Grande City to Sunnyside (Washington) | 1,801.18 mi (2,898.72 km) |
| Rio Grande City to Sunnyvale (California) | 1,552.98 mi (2,499.29 km) |
| Rio Grande City to Sunrise (Florida) | 1,146.70 mi (1,845.44 km) |
| Rio Grande City to Sunrise Manor (Nevada) | 1,170.49 mi (1,883.72 km) |
| Rio Grande City to Sunset (Florida) | 1,146.45 mi (1,845.04 km) |
