Travelers arriving at Madrid-Barajas Airport (MAD) Terminal 4 are served by KLM Airlines MAD Terminal Numerous facilities are available at this station, such as retail centers, a variety of dining options, and cozy lounges. Through expedited security and check-in procedures, KLM guarantees a seamless travel encounter. Travelers' comfort and convenience are improved by the sleek, well-designed Terminal 4, which contributes to a pleasurable experience.