| Rio Grande City to Kalispell (Montana) | 1,725.20 mi (2,776.44 km) |
| Rio Grande City to Kaneohe (Hawaii) | 3,709.72 mi (5,970.22 km) |
| Rio Grande City to Kankakee (Illinois) | 1,193.90 mi (1,921.40 km) |
| Rio Grande City to Kannapolis (North Carolina) | 1,244.34 mi (2,002.57 km) |
| Rio Grande City to Kansas City (Kansas) | 911.47 mi (1,466.86 km) |
| Rio Grande City to Kansas City (Missouri) | 914.39 mi (1,471.57 km) |
| Rio Grande City to Kapaa (Hawaii) | 3,790.94 mi (6,100.93 km) |
| Rio Grande City to Kapolei (Hawaii) | 3,728.11 mi (5,999.81 km) |
| Rio Grande City to Katy (Texas) | 297.69 mi (479.08 km) |
| Rio Grande City to Kaukauna (Wisconsin) | 1,369.51 mi (2,204.02 km) |
| Rio Grande City to Kaysville (Utah) | 1,259.11 mi (2,026.34 km) |
| Rio Grande City to Kearney (Missouri) | 932.72 mi (1,501.07 km) |
| Rio Grande City to Kearney (Nebraska) | 989.55 mi (1,592.53 km) |
| Rio Grande City to Kearns (Utah) | 1,241.65 mi (1,998.24 km) |
| Rio Grande City to Kearny (New Jersey) | 1,724.52 mi (2,775.35 km) |
