可以随身带. 一些可以carry on的小行李箱里面也专门设计了一层来装西服, 但因为箱子小, 衣服还是会皱. 软包的那种, 没用过. 就是装衣服了. 平时拎着应该不容易皱. 如果往行李架里塞, 就不好说了. 我想是不是可以上飞机后交给空乘人员, 帮你挂起来?

Yes, you can handoff your garment bag to the steward, if there is still room in the closet, you can hang it there.  Although some of the smaller airplane don't have closet.  If you only have one suit, i would go with a suiter/roller combo.  Once you arrive at the destination, just hang it up and let the wrinkle fall off.