Airline Safety

Great Table CheenaGringo but one other thing should be looked at before
judging Age of a plane. Maintenance does matter. I would rather fly in a
very well maintained older plane than a new plane operated by folks who
push the maintenence schedule a little bit too far and many of them do.
I had no idea Southwest fleet is that old but they just ordered over 100
of the new 737neo which is like a 737 with new engines and a better
wing flight wise (fuel use). American which just declared bankruptsy has
a huge amount of planes on order.

Z

The age of a plane is a better indicator of fuel efficiency that of safety.