Originally Posted by
Quail
You need the ticket number to begin with 014, i.e. be issued by AC.
This does not necessarily mean that all the flights are AC coded (014 tickets can include UA marketed flights). But, if you book on the UA website you will get 016, not 014.
I see. So I'll get SQM and SQS (the most important one for me) but not SQD. That's OK. Highly unlikely I'll reach the next tier for SQD anyways.
Are there any other differences or benefits when booking one over the other?