Originally Posted by
xliioper
Delta has 24-hour risk-free cancellation window for refunds on new bookings (actually, it's until midnight the following day). One technique is to book a ticket to see what upgrade offer is available, and then cancel ticket for refund if you'd don't find pricing to be reasonable.
https://www.delta.com/us/en/change-c...-flight#24hour
I spoke with an agent about another flight and then asked her about this. She said to try going through the booking and something might pop up at the end of the transaction. I tried comfort and got an offer to upgrade with points or cash to Select but not to Delta One.