| Rio Grande City to Kennewick (Washington) | 1,766.60 mi (2,843.06 km) |
| Rio Grande City to Kenosha (Wisconsin) | 1,278.90 mi (2,058.19 km) |
| Rio Grande City to Kent (Ohio) | 1,425.31 mi (2,293.81 km) |
| Rio Grande City to Kent (Washington) | 1,928.39 mi (3,103.44 km) |
| Rio Grande City to Kentwood (Michigan) | 1,362.21 mi (2,192.27 km) |
| Rio Grande City to Kerman (California) | 1,435.57 mi (2,310.32 km) |
| Rio Grande City to Kernersville (North Carolina) | 1,291.33 mi (2,078.20 km) |
| Rio Grande City to Kerrville (Texas) | 253.52 mi (408.00 km) |
| Rio Grande City to Kettering (Maryland) | 1,539.40 mi (2,477.43 km) |
| Rio Grande City to Kettering (Ohio) | 1,248.98 mi (2,010.05 km) |
| Rio Grande City to Kewanee (Illinois) | 1,145.08 mi (1,842.82 km) |
| Rio Grande City to Key Biscayne (Florida) | 1,158.18 mi (1,863.92 km) |
| Rio Grande City to Key Largo (Florida) | 1,147.97 mi (1,847.48 km) |
| Rio Grande City to Key West (Florida) | 1,069.74 mi (1,721.57 km) |
| Rio Grande City to Keystone (Florida) | 1,002.91 mi (1,614.02 km) |
