Arial Photography gives freedom to photographers for capturing a large panoramic landscape in a single frame. However, when it comes to Arial Photography through commercial Aircraft Window pane, it adds a lot of limitation to this free expression.
The most difficult situation will be to cover a horizontally large landscape. Instead what you may get in your viewfinder could be a vertically large span of area with clear sky horizon. To generate Interesting shots, look for dark or huge cloud formations or significantly visible point of interests.
Also keep your camera ready when the flight is taking off or just about to land to get interesting view of the city.