Can anyone share their experience with a BKK turnaround? I'm doing NRT-BKK-NRT. Arrive 11:25pm on UA and leave 8:25am the next morning on UA codeshare on NH metal. Will I have any problem staying airside? I will try to get my NH departure boarding pass in NRT the day before.
No problem at all. Hundreds do this every night.
However the sleeping area (flat benches, dark & quiet) is likely to be full by the time you arrive.
If you don't have the BP for BKK-NRT the transfer desk will likely open 3 hours or so before departure.