Flight Requirements
Premier Silver Fly 7,000 PQM or 8 PQS on flights operated by United, United Express or Copa to
retain Premier Silver status
Premier Gold Fly 12,500 PQM or 15 PQS on flights operated by United, United Express or Copa to
retain Premier Gold status
Premier Platinum Fly 18,000 PQM or 22 PQS on flights operated by United, United Express or Copa to
retain Premier Platinum status
MileagePlus Premier Status Match Challenge
Bolding mine. Reads a bit oddly, as if it's a way to retain current status that you missed requalifying for on UA, until you realize that the "metals" match up between Delta & UA.