I need to change my flight back to China earlier.
I called ctrip, where I booked the flight (I should do a better job in getting around them). Their term:
Sorry. We cannot do it since it is international flight. You have to give up your back leg, and book a new ticket. If you just change the date, you need to pay 1500 RMB change fee. Let me check what a single trip ticket from San Francisco to Shanghai is. That can be very expensive
Well. I decided not to change, but later, I thought of American Airline, the carrier. I called them, and they said:
Everything has been changed as you wish. BTW, since there is a change in the price of your new route, we are giving $400 back to you
Hmm… For the same question, maybe we need to try different channels.