| Rio Grande City to Pawtucket (Rhode Island) | 1,886.63 mi (3,036.24 km) |
| Rio Grande City to Payson (Arizona) | 921.15 mi (1,482.45 km) |
| Rio Grande City to Payson (Utah) | 1,200.40 mi (1,931.86 km) |
| Rio Grande City to Peabody (Massachusetts) | 1,925.15 mi (3,098.23 km) |
| Rio Grande City to Peachtree City (Georgia) | 980.21 mi (1,577.49 km) |
| Rio Grande City to Peachtree Corners (Georgia) | 1,015.33 mi (1,634.01 km) |
| Rio Grande City to Pearl (Mississippi) | 664.58 mi (1,069.54 km) |
| Rio Grande City to Pearl City (Hawaii) | 3,719.97 mi (5,986.71 km) |
| Rio Grande City to Pearl River (New York) | 1,739.77 mi (2,799.89 km) |
| Rio Grande City to Pearland (Texas) | 306.23 mi (492.83 km) |
| Rio Grande City to Pebble Creek (Florida) | 1,018.75 mi (1,639.52 km) |
| Rio Grande City to Pecan Grove (Texas) | 292.71 mi (471.07 km) |
| Rio Grande City to Pecos (Texas) | 448.12 mi (721.18 km) |
| Rio Grande City to Peekskill (New York) | 1,750.91 mi (2,817.82 km) |
| Rio Grande City to Pekin (Illinois) | 1,112.77 mi (1,790.82 km) |
