The Adolfo Suárez Madrid-Barajas Airport (MAD) is located within Zone A of the Madrid Metro system, which covers the main municipality of Madrid. However, even though it is in Zone A, the airport carries a unique pricing structure. Travelers using Line 8 to reach the "Aeropuerto T1-T2-T3" or "Aeropuerto T4" stations must pay a special Airport Supplement of €3 on top of the standard fare. If you are using a standard "Single" or "10-trip" ticket on your Multi Card, you must load this supplement to exit the turnstiles at the airport. The only travelers who do not need to pay this extra fee are those with a valid Tourist Travel Pass (A or T zones) or a personal monthly season ticket. In 2026, despite the expansion of Line 5 and other transit projects, the Zone A designation remains the standard for the airport, ensuring it stays accessible to city center commuters while still generating revenue through the mandatory tourist and traveler supplements.