| Rio Grande City to Poinciana (Florida) | 1,070.91 mi (1,723.46 km) |
| Rio Grande City to Point Pleasant (New Jersey) | 1,705.83 mi (2,745.26 km) |
| Rio Grande City to Pomona (California) | 1,246.35 mi (2,005.81 km) |
| Rio Grande City to Pompano Beach (Florida) | 1,156.60 mi (1,861.37 km) |
| Rio Grande City to Pompton Lakes (New Jersey) | 1,724.92 mi (2,775.99 km) |
| Rio Grande City to Pompton Plains (New Jersey) | 1,722.80 mi (2,772.58 km) |
| Rio Grande City to Ponca City (Oklahoma) | 721.99 mi (1,161.93 km) |
| Rio Grande City to Ponce (Puerto Rico) | 2,133.05 mi (3,432.82 km) |
| Rio Grande City to Pontiac (Illinois) | 1,159.02 mi (1,865.26 km) |
| Rio Grande City to Pontiac (Michigan) | 1,425.21 mi (2,293.66 km) |
| Rio Grande City to Pooler (Georgia) | 1,128.63 mi (1,816.35 km) |
| Rio Grande City to Poplar Bluff (Missouri) | 870.64 mi (1,401.16 km) |
| Rio Grande City to Poquoson (Virginia) | 1,508.76 mi (2,428.12 km) |
| Rio Grande City to Port Angeles (Washington) | 2,004.87 mi (3,226.52 km) |
| Rio Grande City to Port Arthur (Texas) | 382.83 mi (616.10 km) |
