AEP AFL AKN ANC ATH ATL BAL BOB BOS BRC BUR BWI CAN
CDG CLT CUN CVG DCA DEN DTW EWR EZE FTE HAK HFE IAH
ICN IPC JFK JZH KOA LAG LAS LAX LHR LUN MBA MEM MEX
MIA MYD NBO NRT ORD PEK PHL PHX PIT PPT PVG RKV SAN
SAT SCL SEA SFO SHA SHE SJC SJO SJU SLC SNA SZX TIJ
TSN XIY XMN YUL YYC