I’m currently modelling a 737-800. Although I’m having trouble getting the nose point right. I’m also struggling to get windows, doors and the cockpit windows. It would be much appreciated if somebody can tell me how to do it.
As always: BlenderGuru 
okay some kind of kidding here, but to build a simple one this is the way. And if you model windows and doors just from the side and project them onto the surface with shrinkwrap modifier you are just doing the way actual tutorials on the internet will teach you.