If so, I apologize, and please direct me to the thread in which it's been discussed. I read the guidelines for posting, and I don't think this is a commonly asked (or thought of) question.
Well, I would assume that FE proponents agree with the rest of us that the shortest distance between two points is a straight line, no matter what our earth looks like. This, for the most part, is how airplanes fly. If the earth were flat, planes would take a slightly different route to get from A to B than if we lived on a round earth. Wouldn't a quick look at both maps from each earth-shape and any trans-continental flight plan clear up this whole issue?
I look forward to any answers.