I'm trying to gather from the DPs in this thread how soon points transfer from the different credit cards. So MR points transfer instantly and UR points take a few days, generally speaking? I have not yet transferred to SQ at all, so it would be a first time. Would that possibly delay a transfer? I'll need about 450k points, so it's a considerable amount.

I plan to transfer MR, unless UR would happen to have a transfer bonus at the time of booking.