No WX, no strike. Simply no pax that evening. That was the reason the AS agent told me for why they canceled the block of flights and it made sense given that after CX all those flights, they still only had 14 people on a 737. GEG is very boring when you have already turned your rental car in and have got a 5 hour wait for a flight - I got a nice voucher from that though. Right that the partnership ended last spring in that you could no longer book codeshares. The partnership started phasing out well before then. One of the first cuts was that you could no longer credit AS flights to skymiles. This coincided with DL beginning service on a handful of routes that AS was the dominant carrier for. One of the first such routes was SEA-GEG. That was probably 4 years ago, and this happened a year before that (hence the reason I was on AS, not DL).