Originally Posted by
milesandmoremiles
Incorrect. Check in time has no impact at all on upgrade priority. Only upgrade request time stamp is the factor. With a SDFC, you do retain the time stamp, so if you move to another flight, you fall on the list according to the time stamp of your upgrade request, not according to when you originally checked in.
You're right, I misspoke. Are complimentary upgrade requests initiated at the time of booking, then?