RPU success Sun 5/28 (day before Memorial Day)

UA319 IAD-LAX B739 cleared T-20 days
UA517 SFO-IAD B739 cleared T-24h (at about F8)

UA 1K, G-fare

Both flights had empty seats in F, so CPU waitlist would have cleared. SFO has all those ATC delays (due to runway construction), so not surprised if they hold F inventory as long as they can, to protect inbound international pax. But if I was them, I wouldn't clear CPU until boarding...which they didn't do. So a bit hard to explain.