Aena to Invest €4.48B in Madrid-Barajas Expansion from 2027-2031Aena will invest €4.48 billion to expand Madrid-Barajas Airport from 2027-2031, targeting an annual capacity of 90 million passengers.Mar 12, 2026•5 min•Madrid-BarajasAenaAirport ExpansionDORA IIISpainAIRPORTS