Departing From Bangkok's Don Muang Airport

Check-in for departing flights from Don Muang Airport is on the second floor. Note that you'll need to scan your baggage before you can reach the check-in counters.

After checking-in you pass through a single security scan to get into the departure lounge. Note that there are no facilities in the departure lounge, aside from a small smoking room and toilets. If you want to eat something or buy a newspaper, do it before passing through security.

After the security scan there's an identity check. You need to present your boarding pass and passport at the counters just beyond the security checkpoint.