KLM Airlines BKK Terminal from Bangkok’s Suvarnabhumi Airport (BKK). The main terminal building in Concourse G is where travelers can find KLM. Three hours before the scheduled departure time, the check-in desks may be found in Row M. For those traveling in style, the airline offers priority check-in, among other helpful amenities. Before their trip, passengers can unwind in the grandeur of the Sky Lounge. Employees at KLM are ready to assist with any questions.