It is about the following three companies:
Delta Airlines, China Eastern Airlines, and Orbitz
My itinerary is: SAN->PVG, PVG->DTW, DTW->SAN (San Diego to Shanghai, to Detroit, then back to San Diego)
Including all transit flights, the complete itinerary is:
SAN->LAX->PVG->JFK->DTW->MSP->SAN, involving the following flights:
DL 4712, MU 586, MU 587, DL 1435, DL 1055, DL 1787.
My original departure date is Dec 16, SAN->PVG, and the return date is Dec 28, PVG->DTW, the third leg ...