Do both flights arrive and leave from the same terminal? When I flew SQ out of CAI earlier this year, I connected via BEY (my homebase) on ME. The ME flight landed in the "domestic" terminal and SQ left from the "international" terminal. It is not a simple walk from one terminal to the other. They had to arrange for a bus to take me from one end to the other (a good 5-10 minute ride). Arranging for a bus (and going through customs, immigration and baggage handlers) is a whole new chapter. Let's just say it isn't as "simple" as one might imagine it to be. I am not sure if that is going to be your case too. I think it is almost easier to exit the airport (need to buy a visa from the "banks" just next to immigration) and then check back in later. The hotels next to the airprot (Movenpick and Novotel) are nothing, NOTHING to write home about. Good luck.