Great question - BFN to SHA just means Bloemfontein Intl Airport to Shanghai Hongqiao Intl Airport. Now you’ll know what these unique codes when you look for flights! Guangzhou Baiyun Airport (CAN), Shanghai Pu Dong Airport (PVG), Beijing Capital Airport (PEK), Shenzhen Airport (SZX), Qingdao Jiaodong Intl Airport (TAO) are some additional IATA codes for airports related to your trip.