Roughly a billion passengers make their way through airports across the United States each year — but some of them are having a better experience than others.

Correction: A previous version of this article referred to J.D. Power by the company’s former name. (WJET/WFXP) – Roughly a billion passengers make their way through airports across the United States each year — but some of them are having a better experience than others.

International Airport’s ratings slid over the past year to rank near the bottom of the list in J.D. Power’s North America Airport Satisfaction Study for airports of its size.