There’re 2 actives volcanoes at West Nusa Tenggara Province. In Lombok Rinjani Mt. (3726m asl) and in Sumbawa Tambora Mt. (2800m asl)
Fly Down Rinjani
Rinjani have 2 optional for fly down. North side and South side. All depend wheather and wind direction.
Fly Down Tambora
Tambora have 2 optional for fly down. Fly down caldera and fly down Tambora. All fly down use south side route. Tambora Mt. have 4 route to get the summit.

Tambora 2

Tambora 1

Tambora 3

Tambora 4