| Rio Grande City to Ashtabula (Ohio) | 1,480.25 mi (2,382.23 km) |
| Rio Grande City to Ashwaubenon (Wisconsin) | 1,385.93 mi (2,230.44 km) |
| Rio Grande City to Aspen Hill (Maryland) | 1,532.10 mi (2,465.67 km) |
| Rio Grande City to Astoria (Oregon) | 1,935.72 mi (3,115.24 km) |
| Rio Grande City to Atascadero (California) | 1,435.92 mi (2,310.89 km) |
| Rio Grande City to Atascocita (Texas) | 332.42 mi (534.98 km) |
| Rio Grande City to Atchison (Kansas) | 935.23 mi (1,505.11 km) |
| Rio Grande City to Athens (Alabama) | 912.93 mi (1,469.22 km) |
| Rio Grande City to Athens (Georgia) | 1,059.17 mi (1,704.57 km) |
| Rio Grande City to Athens (Ohio) | 1,315.75 mi (2,117.50 km) |
| Rio Grande City to Athens (Tennessee) | 1,048.52 mi (1,687.43 km) |
| Rio Grande City to Athens (Texas) | 440.77 mi (709.35 km) |
| Rio Grande City to Atlanta (Georgia) | 999.21 mi (1,608.07 km) |
| Rio Grande City to Atlantic Beach (Florida) | 1,091.93 mi (1,757.30 km) |
| Rio Grande City to Atlantic City (New Jersey) | 1,666.63 mi (2,682.17 km) |
