City Codes
Most airlines require you to memorize a large amount of airport codes. Below is a list that may help you out. The most common are listed. 
 ABE  Lehigh Valley International 
 AKL  Auckland, New Zealand
 ATL  Atlanta 
 BDL  Hartford 
 CLT  Charlotte 
 SFO  San Francisco 
 BUR  Burbank 
 DCA  Washington - National 
 DEN  Denver 
 DTW  Detroit 
 EWR  New York City - Newark 
 FLL  Ft. Lauderdale 
 IAD  Washington - Dulles 
 JFK  New York - JFK 
 LAS  Las Vegas 
 LAX  Los Angeles 
 MIA  Miami 
 MSP  Minneapolis 
 
 SNA  Santa Ana 
 PVG  Shanghai - Pudong 
 DXB  Dubai 
 LHR  London(Heathrow) 
 BKK  Bangkok 
 BAH  Bahrain 
 KWI  Kuwait 
 BEY  Beyruit 
 CDG  Paris 
 FRA  Frankfurt 
 DUB  Dublin 
 SIN  Singapore 
 SYD  Sydney 
 BOS  Boston 
 AUH  Abu Dhabi 
 MCT  Muscat 
 KHI  Karachi 
 DEL  Delhi 
 HKG  Hong Kong 
 BOM  Mumbai
 PEK  Beijing 
 STO  Stockholm 
 KEF  Reyjavik 
 PHL  Philadelphia 
 SJJ  Sarajevo 
 ISB  Islamabad 
 
 NBO  Nairobi 
 MSN  Madison 
 MAD  Madrid 
 ROM  Rome 
 YEG  Edmonton 
 SEA  Seattle 
 AQJ  Aqaba 
 JNB  Johannesburg 
 NAS  Bahamas 
 BEG  Belgrade 
 HEL  Helsinki 
 MEL  Melbourne 
 DRW  Darwin 
 HAV  Havana 
 RSW  Fort Myers 
 MRU  Mauritius Island 
 RUN  Reunion Island 
 IPT  Williamsport, Pa 
Phonetic alphabet
The phonetic alphabet is used to avoid misunderstandings and to avoid emergencies.
A alpha B bravo c charlie d delta e echo f foxtrot g golf h hotel i india j juliet k kilo L lima m mike n november o oscar p papa q quebic r romeo s sierra t tango u uniform v victor w wiskey x x-ray y yankey z zulu