how can return/give back the terminated (leasing)aircraft?

I pressed "terminate", and no flight route belonging. It is still on my hand. how can return the leasing aircraft?

The aircraft will be cleared and returned when the current leasing period ends.

On a side-note: I’m glad you seem to enjoy AirlineSim and that you are interested in the game’s features and workings. But I’d like to ask you to post your questions in the community support forum: Other than that I think a lot of your questions can be answered by studying the wiki at

aren’t here any mods, that can switch the threads over