Cathay Pacific Inter-Airline Through Check-in (IATCI) Agreements
AS Alaska Airlines HKG, BOS, EWR, IAD, JFK, LAX, ORD,SEA, SFO, YVR, YYZ
B6 Jetblue Airways BOS, EWR, JFK, LAX, ORD, SFO
DL Delta Airlines HKG, ATL, JFK, LAX, SEA
UA United Airlines All stations
AA American Airlines All stations
理论上御三家+B6 AS都能挂，不过现实是非联程票这些地勤基本都不愿意。做好在始发机场被拒绝的打算吧