Originally Posted by
FinalF137
I just bought an Air China ticket through the AMEX website; it didn’t have seat assignments listed, but I called the Air China’s US support at 1-800-882-8122 and gave them the ticket number that started with 999 and they were able to give me seat assignments 3 months out from my departure date. She also said to just use the printed itinerary from AMEX for any documentation for the airport.
Yes this is correct. Printed itinerary with the 999 ticket number on it and your passport is all you need to check in.