It looks almost identical to this picture:
Photo © Jerry Search
But now the problem: it was flying high over the Nashville airport, going east I believe. Jetblue does not fly anywhere in the southeast outside of Florida, right? To any of the jetBlue folks, do you have any idea what city pairs could make this route over Nashville? BTW, this was at 5:42pm.
Or, what other airline has a similar color scheme? This plane looks like an Airbus from the shape of the tailcone. I know it cant be United. Their blue bottom goes all the way to the end. And its not Northwest because NWA does not have blue engines.