I will be already checked in as I have a conecting flight from Khon Kaen. I just have to walk to immigration for the re-entry. i called immigration because I wanted to make the re entry in avdance but they said since I live 80 kilometers from their office, I can do it at the airport no problem at all and I just wanted to hear what would ppl say about that in this group. Since I'm already checked in, it seems 90 minutes will be more than enough...