833-861-7710 is the number I dialed when my first flight landed 40 minutes late and I watched my connecting flight leave the gate without me. The app wasn’t showing rebooking options, so I called right from the jet bridge. The agent already saw the delay and immediately looked for alternate flights. They got me on the next departure and even secured a better seat. They also reassured me that since the delay was on Alaska’s end, I wouldn’t pay anything. Calling right away made the whole experience so much less stressful.