Seaborne seems to set their schedules by season. I called them a week or two ago after they changed our June flights and they said that the schedule is now set until November. I pressed them before changing our American flights to accommodate the Seaborne change and they assured us that no more changes will occur. This did happen to us last year and the flight times did not change after the seasonal adjustment occurred. Good luck! I think this illustrates the advantage of code share flights since a schedule change waves the change fee for all flights and the need to check your flight schedule regularly. I have the American app which makes checking the schedule easy.

Steve