Originally Posted by FlyPurdue

D1s get you higher up the list, ahead of all D2s D2Ts, but behind D1Ts. Once all the revenue standbys, upgrades, oversales, etcetera are cleared - you will then be assigned a seat in list order. If premium seats remain, and you are listed for premium - you would get assigned a premium seat in list order.

Two caveats to remember:

1. I have been saved when the flight was full in main, there were 5 or so revenue standbys, and 1 premium 'no show'. I made the flight as the revenue standbys were not eligible though tier, or otherwise for the premium seat.

2. On a long haul flight - passengers may only be eligible for a Y-->J/W upgrade, meaning you could bypass them if seats remain open in Flagship First (only on the 77Ws).

Hope that helps!