It's a pretty sky, but the shot lacks tension. Having the tree off center might have made this more interesting. It might have been cool to have the airplanes' contrails reach all the way across the picture, with the tree in the right of the frame. See what it is like to crop off some of the right and the top. The top (in particular) is ultimately not that interesting.

I like the position of the tree in the shot. Good job.