I wanted to add my solution here since I just booked a Condor flight with a leg on Alaska, and wanted to add my Alaska MP number to the reservation.

There's an easy solution that does not involve calling Condor or hitting up Twitter. Basically, take your 6 digit booking code from Condor and plop it into Check My Trip here: https://www.checkmytrip.com/cmtweb/w...html#/triplist. This will get you the Alaska Confirmation Code. You can search your reservation on alaskaair.com by the Alaska confirmation code that you now have, and you will be able to select your seats. You can also add your Alaska MP number to the reservation for elite benefits and to get your miles.