Sorry to drudge up an old thread, based on the comments, i understand that there is no official policy for same day standby for intra-asia flights, but the agents are pretty lenient? I'm have a HKG-TPE flight that I may want to take an earlier one, I assume that should be no issue if there are seats, since there are literally flights on the hour.

I've been able to do it easily on JAL flights, they have a "standby checkin desk" that allows you to pick your flight, you're even given priority with your OW status. Super efficient, but I would expect nothing less from a Japanese carrier.

Not the end of the world if not, i'm connecting thru DFW and my if my flight is early, I'd like to hop on an earlier flight, if not, more lounge time is not going to kill me.