My bro was flying GEG-MSP-LGA-PWM yesterday, departing 9:45am arriving 9:36pm. He was rebooked to the 7pm GEG-SEA, Red-eye SEA-ATL, ATL-PWM. They cancelled the ATL-PWM flight and now he's been rebooked into BOS sometime today. Does he have enough reason to ask for a full or partial refund since Delta is no longer getting him back into his original destination?