Well, Delta from CWA to MSP to PHX on the 17th went smoothly for my daughter. Flights back were a different story! Flight leaving Phoenix was delayed (mechanical problems). Delta put her up overnight in Minneapolis and provided a food voucher. Then the first flight of the day to CWA was cancelled! And she reports that the GA at MSP were surly and not helpful.
She'll have to do it all over again at Christmas, so we hope she had several trips worth of delays and snafus this time.