Originally Posted by
wco81
If you try to upgrade with miles and copay on an economy ticket, would they only upgrade you to Premium Plus, not Business?
You can waitlist for Business only or PP & Business.
If you do the latter and get PP, you will be waitlisted for Business still.
If you get nothing the miles and copay are returned
If you only get PP, the copay is returned but the miles are consumed.
More specific UA states
If you requested an upgrade to the United Polaris business class cabin, and we moved you to a United® Premium Plus seat, we’ll refund the difference in co-pay and miles after departure.
But presently none of the PP mileage upgrades have copays and in most cases, the mileage is the same for PP & Business