yes open 24hrs and whenever they have flights. Dont worry about it and it is the same at both Suvarnabhumi and Don Muang.... Just ask them before entering that where is reentry and they will guide you.....Reentry at suvarnabhumi is at the common immigration clearance area if i am not wrong
Thanks all....re entry desk is after immigration clearance on the left....ensure you have all forms and photocopies and photo or they will charge you and extra 200 baht
alright i will be flying 8am on sunday and i totally forgot i had to do a reentry permit so i will have to leave it till the last minute at the airport