Definition of a regional airport

Answer 1

According to wikipedia ..... (found in wikipedia - Types of Airports - selected Regional) = Regional airport =

A regional airport is an airport serving traffic within a relatively small or lightly populated geographical area. A regional airport usually does not have customs and Immigration facilities to process traffic between countries. In Canada regional airports usually service connections within Canada and some flights to the United States. A few U.S. regional airports, some of which actually call themselves international airports, may have customs and immigration facilities staffed on an as-needed basis, but the vast majority serve domestic traffic only. Aircraft using these airports tend to be smaller business jets, private aircraft and regional airliners of both turboprop propelled or regional jetliner varieties. These flight usually go a shorter distance to a larger regional hub. For medium-size countries like France, Germany, Sweden, a regional airport is an airport used with smaller planes, even though they go to the national hub, just like flight from larger domestic airports.