> when it comes to filling a 737 That brings up an interesting point. I wonder how much of a factor fuel is in dictating the preferred size for an airliner.

> when it comes to filling a 737 That brings up an interesting point. I wonder how much of a factor fuel is in dictating the preferred size for an airliner. Maybe if the fuel economics and physics change, we'll see an evolution towards larger numbers of smaller point-to-point airliners.