I had to change my Delta flight a few months back when my vacation dates got shifted, and I was worried it’d cost a fortune. Turns out, Delta doesn’t charge change fees anymore for most main cabin or higher fares—you just pay the fare difference if the new flight is more expensive. I called 877-764-3622, and the agent explained everything clearly before making the switch. It took maybe ten minutes total, and the fare difference was way less than I expected. I’ve learned it’s always worth calling that number first because they can instantly tell you the cost, available flights, and even help rebook on the spot.