Collateral Damage from DL/AS Codeshare Cancellations
 

Resolved.

Nevermind.

Move along.

Even if it was resolved within an hour, what was the issue? It might affect other people who need to know what the issue is and what you did to resolve it.

Ok, fair enough. I had booked a SEA-YVR flight on Alaska/Horizon after the date where DL stopped codesharing with them on that route. It was booked as part of a DL ticket from Shanghai.

Today, when I went to check for any flight changes, I saw that the SEA-YVR flight wasn't showing on either the Fly Delta app or delta.com, and that this particular leg of my trip was now showing as ending at SEA. All my other flights were still there.

I went ahead and called my local DL customer center (I am abroad right now) and was rebooked at no charge onto a DL/Skywest flight. This being an international itinerary, I didn't have the option of changing it online, so I'm not sure if that would be an option for someone in my position (a canceled AS/QX flight due to a codeshare termination, which is the only reason I can think of for why this happened) with a purely domestic itinerary.