Aircraft units can be produced at the Airport.
The following types of Aircraft are available:
Airfields are needed to store your aircraft and are used for takeoff and landing. Airfelds are part of your airport.
All aircraft consume fuel from Kerosene continuously while flying and therefore need to be resupplied at airfields in between flights. All aircraft use a different amount of fuel per second and have varying fuel capacities related to size.
The Aircrafts are haunted by a glitch that is actually quite weird. It's not easy to do, but if the player lands an airplane and does it properly when commanding it to fly to another location, the plane will remain on the ground, but move like normal. The giant advantage is that it doesn't consume any fuel, so it can fly forever. However, it's a bit unsure if it's able to attack or if it takes damage when attacked by an enemy.
As of Patch 2.0, this glitch no longer works.
Aircrafts are not only used for military purposes, though none of those extra functions can be used by the player in any way. Eco Executive Mansions usually have a small aircraft used by the Executives to travel in the city, giving Eco cities a unique outlook compared to the Tycoons. Other than this, Leo Moreaus' people use aircrafts around all his warehouses, but their purpose is unknown.