This seems like the only schedule-change thread.

I got an 11 hour schedule change for a flight at the end of next month, from landing at noon to eleven at night. No refund or change option was offered in the email, they merely rebooked for the same day. For whatever reason, the flight is on this schedule for just three weeks in May and June, after which it reverts to the 'original' timing. It's flown less than daily and like many spokes, is only serviced from one city (ATL).

What would Frontier's invol policy allow? I'm assuming I can't change the flight by three weeks when the time of the itinerary is suitable again. Would one week be possible? Is my only choice to cancel if the already auto-rebooked option doesn't suit?