Originally Posted by
freeman300
Can it happen on say ARN-ORD? Can all M pax sign up if they want? Is there a upper maximum per flight?
Definitely, I upgraded ARN-ORD (from economy plus) and ORD-ARN (from economy) last week. ARN-ORD was full in all classes, ORD-ARN was half-full in C. Looked like a lot of upgrades and crew relations in both cases.