| Rio Grande City to Baraboo (Wisconsin) | 1,286.02 mi (2,069.66 km) |
| Rio Grande City to Barberton (Ohio) | 1,409.43 mi (2,268.27 km) |
| Rio Grande City to Bardstown (Kentucky) | 1,109.62 mi (1,785.77 km) |
| Rio Grande City to Barrington (Illinois) | 1,246.66 mi (2,006.31 km) |
| Rio Grande City to Barstow (California) | 1,229.23 mi (1,978.25 km) |
| Rio Grande City to Bartlesville (Oklahoma) | 735.16 mi (1,183.12 km) |
| Rio Grande City to Bartlett (Illinois) | 1,234.52 mi (1,986.76 km) |
| Rio Grande City to Bartlett (Tennessee) | 811.30 mi (1,305.66 km) |
| Rio Grande City to Bartow (Florida) | 1,049.64 mi (1,689.23 km) |
| Rio Grande City to Batavia (Illinois) | 1,223.93 mi (1,969.72 km) |
| Rio Grande City to Batavia (New York) | 1,632.48 mi (2,627.22 km) |
| Rio Grande City to Batesville (Arkansas) | 775.44 mi (1,247.95 km) |
| Rio Grande City to Baton Rouge (Louisiana) | 544.90 mi (876.93 km) |
| Rio Grande City to Battle Creek (Michigan) | 1,341.88 mi (2,159.54 km) |
| Rio Grande City to Battle Ground (Washington) | 1,870.24 mi (3,009.87 km) |
