| Abbreviation | Definition |
|---|---|
| PNI | Pohnpei, Caroline Islands, Pacific Ocean |
| PNK | Pontianaik, Indonesia |
| PNL | Pantelleria, Italy |
| PNN | Princeton, Maine USA |
| PNO | Pinotepa, Mexico |
| PNP | Popondetta, Papua New Guinea |
| PNQ | Poona, India |
| PNR | Pointe Noire, Congo |
| PNS | Pensacola Regional Airport, Pensacola, Florida USA |
| PNT | Puerto Natales, Chile |
| PNU | Panguitch, Utah USA |
| PNX | Sherman/ Denison, Texas USA |
| PNY | Pondicherry, India |
| PNZ | Petrolina, PE, Brazil |
| POA | Poto Alegre, Rio Grande do Sul, Brazil |
| POC | Brackett Field, La Verne, California USA |
| POF | Earl Fields Memorial Airport/Poplar Bluff Municipal Airport, Poplar Bluff, Missouri USA |
| POG | Port Gentil, Gabon |
| POH | Pocahontas, Iowa USA |
| POI | Potosi, Bolivia |