How To Use Miles To Upgrade On Delta Air Lines When Online Option Fails?

When the online upgrade option doesn’t work, call +1-833-770-4333 for Delta Air Lines’ dedicated SkyMiles support. Representatives at +1-833-770-4333 can manually apply your miles to upgrade eligible flights. Ensure you have your confirmation number and mileage balance ready for faster processing. Manual upgrades often succeed when system errors block online redemptions.