I prefer JetBlus over Delta. But, that's due to the free first checked bag, and the entertainment system with JB. I also find that Delta makes more changes than JB does. I just flew JB...Boston to Orlando..in the past week. The flight down was scheduled to depart at 7:10am, but there was a mechanical issue. We were taken off the plane and then put on another one at 10ish. We were give $50 credit vouchers...didn't quite make up for the time I lost, and meets I missed, in WDW, but it's more than Delta tends to do.