I am flying RT into HK in a couple weeks, but while I am there I will be stopping over in SIN and BKK, the only way I could work it out is to leave BKK the same day of my return flight home from HKG-SFO. I am on the first flight out of BKK on Air Asia in the AM around 6 am I believe and i gets me into HKG at 10-10:30, my UA flight leaves at 12:45 PM.

Will I be okay on getting to my flight? I have a 22inch carry on bag that I know qualifies fine for the United flight, but not sure if they will allow me to carry that on to the Air Asia flight from BKK-HKG. If I cant carry it on, is it gate checked or checked to HKG for claim?

Worst case scenario to claim the bag, is the 2:30 enough time to make my connection? Is Air Asia generally on time the first flight of the day?