Flying BOS-SFO tomorrow, 11/29/17, on UA2400, on a K fare, with a waitlisted GPU. I called the 1K Desk yesterday, and while the agent didn't have access to the priority order of the wait list, she said that there were 20 1K's on the list.

United is still selling Q fares in economy, so my question is - What is my likelihood of clearing if I upfare from K to Q to improve my chances of the GPU clearing? Availability is as follows: J3 JN3 C3 D1 Z0...

FWIW, this is an "old" GPU that expires next year, and this will probably be the longest flight I take in the next six months...so the $230 upfare seems worth it (should I clear.)