Originally Posted by
FLLDL
Others were new NW routes which are somewhat redundant post-merger. DTW-PVG would basically be in competition with ATL-PVG and would drive down loads/yields for both.
It would be very impractical to drive
all PVG traffic for the largest airline in the world through ATL.
People need to remember that NW has a significant customer/passenger base and the new airline isn't going to be able to dismiss former NW routes simply because they're already operated out of a DL hub.