"Hello fellow travelers,

I'm currently in the process of booking a ticket from Japan to IAD (Washington Dulles) in Premium Economy class. However, I'm a bit confused about the miles accrual rate for a specific situation, and I was hoping someone here might be able to provide some insight.

The flight I'm looking at is operated by All Nippon Airways (NH) but is marketed under a United Airlines (UA) codeshare. The two booking classes available for Premium Economy are R and A, but I'm unsure about the corresponding miles accrual rates (put in NH program) for these classes.

Upon checking ANA's miles chart, I couldn't find any information about the R booking class, which has left me a little perplexed. Additionally, the A booking class is typically associated with First Class, which adds to my confusion.

I'm eager to understand the miles accrual rates for these specific booking classes on this NH-operated but UA codeshare flight. If anyone has experience or knowledge about this particular scenario, I would greatly appreciate your input.

Thank you in advance for your help!"