You already got an answer, wireless sucks! Unfortunately there isn't much you can do to help it, or fix it.
Wireless works ok for web browsing and eve some games, but a flight sim style game has a ton of information that has to be update reliably and very often. With planes flying at 350 mph how much space do you think you cover each second? That data has to be run to your computer and back a bunch of times every minute to place each plane. Picture a furball!
Wireless is too restrictive and just can't keep up with the info so you get packet loss which turns into warps. Running a cable isn't that big a deal. Second story, throw it out a window, down the hall only run it out when you fly but run it down the hallway floor.