When I much younger,a teen(so long ago). To build miles I used to go through as many hubs as possible,for example:
1.AUS-DFW-ORD-BWI
2.AUS-DEN-ORD-DET
3.AUS-DFW-ATL-CVG-WAS(you had to start out early in the morning for this and pray that there is clear weather across the country.)

Again,that was long ago,today time dictates nonstop flights when possible. My question is whoelse have done the same? Or continues.