我也查了 分享下
美国中国之间国航
Free checked baggage requirements for Economy Class cabin
Economy Class passengers with adult-fare or child-fare tickets are allowed
up to two pieces of baggage free of charge, each weighing no more than 23kg
and with total linear dimensions of each piece not exceeding 158cm
应该是2个158箱子 23kg以内就可以
听听大家怎么说吧