Originally Posted by
MSPeconomist
Can't you also get a refund for a change from mainline to DL Connection?
Yes and I use this all the time to change my DTW-ORD and other flights all the time. I even once got an agent to change a DTW-MYR flight that changed from mainline to a express carrier to DTW-BNA-ATL-MYR to stay on mainline all the way.