First, you have to find your booking in My Trip section on delta.com or the Fly Delta app. If an upgrade is available, then you will get an option of Select Seats for miles or money. Then, you must pick an available seat on the seat map and finish the process.
As a SkyMiles member with Delta Airlines Platinum Business Card or SkyMiles Platinum, you are eligible to enjoy unlimited complimentary upgrades after booking card members to Delta Comfort+, First Class, Plus, etc.
The cost to upgrade a seat on Delta varies at the time of check-in, usually ranges from $50 to over $1,000 based on the seat availability, flight routes, and the class of cabin.
Yes, you can use Delta Airlines SkyMiles to upgrade your seat to any preferred class of cabin. However, you have to first check your eligibility in order to upgrade your seat.
Customers can upgrade from Main Cabin to Delta One, First Class, Delta Premium Select, Delta Comfort+, or from Delta Comfort+ to Delta One, Delta Premium Select or First Class anytime after confirming their ticket until 90 minutes before the departure or until the check-in period has closed.
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