I have an upcoming reward coming up the return is set up like this BKK-CDG-FRA-PHL-IAH all on one day. There are no stopovers planned, but I was wondering if I could switch the FRA-PHL to FRA-EWR (stopover)-IAH, the connection from CDG-FRA would be less than 24 hours (more time in the LH FCT) and then in EWR stopover or end my travel there. How long of a stopover is allowed? Or if I can't stopover can I end travel in EWR even though my origination was IAH?