Does anyone know what the formula UA uses to determine how many miles the offer us on the buy up option on a ticket? Last month I got offered 7k miles on a IAH-BOS rt flight (I grabbed then when thr price dropped to 2.1cpm) and it was more than the double they used to offer. I have a IAH-EWR for next month and they were offering 5k miles, less than double. (Up until last night was holding at 2.1 but dropped to 1.9 so, yes I grabbed then) and I booked a IAH-ATL run ad they offered 3k miles...again more than double and at 1.9 right from the get go. It looks like sometimes they round up and others they round down. I sort of liked the old way better where it was, just take the flight miles and multiply by 2 or 4. And the eqm's were running at 9.9 out the door. I grabbed then on the ATL flight to put me at 24k eqm's before the trip. After the flight I will be silver again I figured I might as well take advantage of my Pres plus cc PQD waver and get silver as my PQD's were only going to be at $2k max this year. The extra bonus miles on the EWR trip will be nice and I'll at least be on the upgrade list (plus the bonus miles while going to HNL and BCN next year will be nice Sent using a small piece of fruit.