Conroe-North Houston Regional Airport is a public-use airport in Conroe, Texas, United States, 37 miles north of the central business district of Houston. It is publicly owned by Montgomery County. Conroe-North Houston Regional Airport was constructed during World War II to serve as a military facility, but was converted in 1945 to be a predominantly civ…Conroe-North Houston Regional Airport is a public-use airport in Conroe, Texas, United States, 37 miles north of the central business district of Houston. It is publicly owned by Montgomery County. Conroe-North Houston Regional Airport was constructed during World War II to serve as a military facility, but was converted in 1945 to be a predominantly civilian airfield.