Delta Airlines uses Terminal 1 (T1) at Adolfo Suárez Madrid–Barajas Delta Airlines MAD Terminal Passengers can find check-in counters and baggage drop in this terminal. If you have already checked in online, you can go straight to security. Terminal 1 offers many services, including shops, restaurants, and free Wi-Fi. While Delta does not have its own lounge, business class passengers or SkyMiles members can access partner lounges in For easy access, follow the signs to Terminal  from other terminals or use the free airport shuttle.