Domestic airport

Some small countries or regions do not have any public domestic airports, or even public domestic flights, due to their size or political reasons, or due to having alternatives to domestic flights such as high-speed rail (e.g. Belgium, Kuwait, Hungary, Lithuania, Luxembourg, Serbia, Singapore, Slovakia, and the United Arab Emirates).

A regional airport usually does not have customs and immigration facilities to process traffic between countries.

A few U.S. regional airports, some of which 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 airports usually have shorter runways, which exclude heavy planes with much fuel.