Yes, you can use a Viva Viagem card (now often branded under the navegante® occasional card system) immediately upon arriving at Lisbon Airport (LIS). The airport is directly connected to the "Aeroporto" metro station on the Red Line (Linha Vermelha). You can purchase the card for €0.50 at the automated vending machines or the ticket office in the station. Once purchased, you can top it up with a single journey, a 24-hour pass, or "Zapping" (pre-paid credit). In 2026, the "Zapping" method remains the most flexible option for travelers, as it allows you to use the card across the Metro, Carris buses, trams (including the famous Tram 28), and even the trains to Sintra or Cascais. It is important to remember that the card is individual—each traveler must have their own—and you must validate it at the yellow readers every time you enter a station or board a vehicle to avoid significant fines from transit inspectors.