The code is: PIE
The 3-letter code for the Adelaide Airport is ADL.
The airport code for Zagreb Airport is ZAG.
The airport code for Jammu Airport is IXJ.
The airport code for Shannon Airport is SNN.
The airport code for Miyako Airport is MMY.
The airport code for Seoul Air Base is SSN.
Honolulu, HI - Honolulu Airport (HNL).
The airport code for Gao International Airport is GAQ.
The airport code for Altay Airport is AAT.
The airport code for Oshawa Airport is YOO.
The airport code for Tandag Airport is TDG.
The airport code for Hokitika Airport is HKK.