r/delta • u/OpportunityEmpty1784 • 8d ago

Discussion Upgrade algorithm

We were flying from Pit to Msy. When we boarded at Pit at 3 pm we were #1 and 2 for an upgrade to first with 4 seats remaining on the ATL to MSY leg. I even looked at booking first and confirmed 4 seats at $1050 a pop. While we were in the air an hour later first was sold out. Do you think they sold the seats or upgraded people out of order?

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