How Do I Request a Delta Upgrade?

Already booked your seats on Delta? You should be aware that the airline allows for seat upgrades easily and conveniently. here are the steps to upgrade your Delta flight online. 
Visit the Delta Airlines official website. 
Select the “My Trips” section. 
Plug in your 6-digit booking number with your name. 
Your entire booking details are presented on your screen. 
If your booked ticket qualifies for an upgrade, click the “Select Seat” tab to upgrade seats in Delta Airlines. 
Next, you have to pay the Delta Seat Assignment fee with Delta SkyMiles or from your balance. 
After that, use the Delta Airlines seat map to pick a preference and finish the transaction process.
For more details on how to Upgrade Delta flights, visit Delta Airlines official website and read the blog by Airlines Group Travel.

Read more:- https://www.airlinesgrouptravel.com/blog/how-to-upgrade-on-delta