I remember if you fly from canada to us, the us custom is at canada side. So they verify your immigration status when you board the plane. Then it is like us domestic flight when you transfer.
【在 s*****c 的大作中提到】 : I remember if you fly from canada to us, the us custom is at canada side. : So they verify your immigration status when you board the plane. Then it is : like us domestic flight when you transfer.