I've managed to become confused again, and looking for some help. I'm traveling on a reward: SFO-FRA-MAD MAD-FRA-EWR (Stopover) EWR-SFO I want to change my last flight to come home from DTW-SFO. Is that a valid open jaw? If not, can I change my return to EWR-DTW and terminate there? Thanks in advance.