Suvarnabhumi Airport Departures
Bangkok departures are fairly easy. The departure hall is on Level Four of the main terminal building. Large monitors display information about where to check in for your flight.
After checking in, international passengers go through security and then immigration at the back of the main terminal hall. Once you've passed through immigration and security, you enter the concourse, with all of its duty free shopping opportunities.
Domestic passengers go through a security checkpoint at the rear of the main terminal hall to gain access to the domestic departure concourses, where you'll find a few shops, airline lounges and a food court.