Dunkin' Donuts is an American coffee and donut chain that has gained popularity worldwide. In Madrid-Barajas Airport, Dunkin' Donuts offers a variety of coffee drinks, including their signature Dunkin' Original Blend Coffee. They also serve a wide range of donuts, bagels, and sandwiches. The café has a vibrant and energetic atmosphere, making it a great place to grab a quick coffee and snack before your flight.