The Maldives is an archipelago of lagoons situated in the Indian Ocean. I think it would make for an excellent region.
The main airport would be Malé Intl. This would be where all you jets are.
There are hundreds of other airports, several of which are seaports. This would go well with Seaplanes.
The region would not be ideal for jets as the only airport they could use is Malé, but it is perfect for smaller planes, which are a necessity.
The archipelago’s islands are all low lying, and many of the airports’ runways cut out into the turquoise sea.
Criticism of the idea is fine.