L. M. Clayton Airport is a public airport three miles east of Wolf Point, in Roosevelt County, Montana. The airport is served by one airline, subsidized by the Essential Air Service program. Reportedly, it is smallest airport in the 48 contiguous states with scheduled air service.
The Federal Aviation Administration says this airport had 321 passenger boardings (enplanements) in calendar year 2008, 900 in 2009 and 494 in 2010. The National Plan of Integrated Airport Systems for 2011-2015 categorized it as a general aviation airport (the commercial service category requires at least 2,500 enplanements per year). * Source: Wikipedia