Originally Posted by
3Cforme
Delta has been using married segment availability on awards since November 2014. You might be frustrated getting from AUS to an international gateway. (Unless you were just thinking Aeromexico!) Delta does have 20+ carriers available for booking online in contrast with AA's eight, so in that regard award bookings are easier.
Not speaking to the specifics of your destinations, Delta will get you more AVOD, more 2Ku satellite wifi, fewer CR2/E145 single-class planes. You'll find better on-time performance, fewer cancellations, and quicker and more reliable baggage handling.
I would look at the networks very carefully for one's own flying patterns. Delta has 8x to ATL tomorrow while AA has 11x to DFW; if you're headed west Delta can't match AA.
DL offers x3 to LAX, x1 to SEA, and x3 to SLC
AA offers x4 to LAX and x4 to PHX
UA offers x5 to DEN, x5 to SFO, x2 to LAX
I know one can back track some to DFW or IAH and have many more options, but just looking a flights headed west, UA has the edge while AA/DL are even, but DL offers one more destination.
But DL is getting more gates at AUS, who knows what else will be added.