Douglas–Charles Airport, formerly known as Melville Hall Airport, is an airport located on the northeast coast of Dominica, 2 mi northwest of Marigot. It is about one hour away from the second largest city Portsmouth. It is one of only two airports in the island nation of Dominica, the other being Canefield Airport located three miles northeast of Ros…Douglas–Charles Airport, formerly known as Melville Hall Airport, is an airport located on the northeast coast of Dominica, 2 mi northwest of Marigot. It is about one hour away from the second largest city Portsmouth. It is one of only two airports in the island nation of Dominica, the other being Canefield Airport located three miles northeast of Roseau.