I noticed that last week. We are using our frequent flyer miles, but DD's friend has decided to come with us, so I was checking online to give her an idea of the cost of the air.
However, we originally booked leaving Aug. 15 on a non-stop flight from SDF to MCO, leaving at 7 am and arriving around 9 am. We've taken that flight before and I really like it. Delta cancelled that flight on that one day!
I checked every other day of that week and it's still available. Just on Tuesday they don't have it anymore. So I'm trying to decide if I should keep the flight they changed us to, which leaves at 6:30 am and arrives at 10:30 or try to change it, or wait to see if they put the 7 am flight back in their schedule.

But we'll have a great time regardless!