These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Queenstown Intl Airport to Raleigh-Durham Airport flight would often be abbreviated as a ZQN to RDU flight. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Greensboro/H. Point Airport (GSO), Fayetteville Airport (FAY), Lynchburg Preston-Glenn Field Airport (LYH), Pitt-Greenville Airport (PGV), Winston-Salem Smith-Reynolds Airport (INT).