Originally Posted by
terminalc
I'm new to *A as a CO Onepass member and, of course, new to trying to get an SQ upgrade. I am CO Platinum/*G and am considering booking economy (B fare) IAH-SGN on SQ61/62 for a Jan departure.
Right now business is wide open on most dates. I've read that SQ is very stingy with upgrades so my question: will they clear all waitlisted upgrades if seats are available?
There are two issues:
1) You cannot waitlist for partner upgrades.
2) SQ doesn't release O/I inventory for 77W and A380 flights. You need I inventory to upgrade using partner miles. You can use D inventory if using SQ miles albeit at higher mileage level.
To answer your question, yes SQ does clear upgrade waitlists, often within days or hours of flight. But you can only waitlist in D class using SQ miles.