There seems to be a distinct lack of anything supersonic in Minecraft (there is probably a reason for it but I can't see it). At any rate, it would complete many a disappointing airfield even if they didn't move and sort of just sat there as excellent statues. So, I propose that even if it's not feasible to make them move at a real-life speed, they would still be good as a decoration.
Flan's mod added planes, but they were just prop planes and not jets. I would like to see this in Minecraft. Maybe you could talk to the guy who took up Flan's Mod and ask him to add Jets into the mod.