My CO flights DCA-IAH, IAH-SJC, SJC-IAH this past Sat were completely packed. Only one not completely full was IAH-DCA in the evening.

Also completely packed CO flights the week before DCA-IAH, IAH-ONT on a Friday, and ONT-IAH on a Monday.

The SJC-IAH was sold out in F, I was #1 on the list - but did not make it. So some routes are still full in Y.