Caz, an old lawyer friend of mine advises "don't ask a question you don't already have an answer to." I asked in part to smoke out the hand waivers and assumers. I've already looked at the map and saw a number of obstacles to easy movement of military personnel by air through airspace of other countries.
Why do you assume that Iran will give the green light to Turkey to move Turkish troops through their airspace to do this?
Have they done so in the past?
Iran has skin in this game: do they want the Turks to upstage them?
I don't make the assumption that there is an easy button in Ankara to push and off they go.
Perhaps the political arrangements are in place, perhaps not.
Part of what I am asking is about the unknown: is that political accord in place between Iran and Turkey, or not? I don't know, so now ask that explicitly. Do you know, or are you guessing?