My family had a 9 hour delay in Aruba last week going to jfk due to an airplane door issue. Then when we got to jfk it took 2 hours to get our luggage. They said it was due to a shift change. Delta has emailed me vouchers for 75 dollars per family member. I read on line that if the flight is 8 or more hours that you get a refund. I have been emailing them but have not heard back in a few days.