My wife and I are both GM’s and we are traveling with her using a AMEX platinum card companion ticket on a 2 leg itinerary. LAX-ATL-FLL. We would like to take an earlier flight for the second leg, ATL- FLL in order to arrive home 1.5 hours earlier than the original itinerary that was booked where we were limited to the availability of flights.

Can we do SDC? If yes can we contact Delta within 24 hours of the first flight or do we have to wait for 24 hours or less on the second flight? Also is it possible to do a change before the 24 hour window as they are waiving change fees where are we limited because this is a companion ticket?