Like I said, yesterday everything was functioning fine but today nothing’s moving on the ground and there are about 12 planes total circling in 2 groups. One group is going clockwise while the other group is going counterclockwise. I go to a different part of the city and come back to find the tarmacs of both the cargo airport and cargo airport hub full of planes and planes circling over the two international airports in opposing directions. Today I built an extension off the interchange that goes to the airport complex and put the ChirpX launch platform on the extension as well as some lower buildings that shouldn’t impact the landing path of the planes going to any of the airports.

Planes taking off and landing like they’re supposed to. The airports and cargo air terminals were added on Tuesday morning and no circling. You will then have two airports connected to their own outside connection and the planes will have efficient loads. Only allow one of them to be used by this airport and connect the other to a different airport.

In this case (if it is two outside connections), remove a piece of the air route (mod/s required to do so) to create two independent routes to each outside connection. Use only one terminal to connect to a single outside connection. It is the same for trains, boats and planes. Not only that, the loads per vehicles spawned will be shared, resulting in inefficient loads per vehicle. This causes vehicles to be spawned at the outside connections and results in overspawning and congestion. You have a terminal linked to air routes that are connecting to multiple outside connections. It isn't a bug, it is how the game works and by not understanding the mechanic, you are causing the issue. The planes will however come back again after a few minutes. You get rid of them by closing and reopening your airports. Originally posted by ErnoT:I have this bug as well.

Cargo airport hub cities skylines