You'll get one (1) elite-qualifying segment (EQS) for each pd, qual flight segment you complete on flights operated by UA & *A partners (including AC.) You get 1.5 EQSs for each pd, qual. flight segment you complete on flights operated by UA, US, & LH (only when purchased w/ UA flight #) if it's a first class, biz class, or unrestricted economy class ticket, which are Y or B fares on UA or L# (that's the carrier code for UA code-share flights operated by LH that Mileage Plus sees when they pull up MP account flight histories) Not sure of high-yield fare classes for US. You might want to review your segment history, chances are there's a high-yield bonus EQS in there somewhere. I use to work for MP Cust. Serv. so unless the rules of program have changed dramatically, the above info should be correct. BTW, UA defines a flight segment as "one takeoff, one landing, one flight #." Hope this is helpful.