Purchase a rechargeable Viva Viagem card (€0.50) and load with credit or day passes. Works on metro, trams, buses, funiculars. The Lisboa Card includes unlimited transport plus free/discounted entry to attractions (€31/24 hours, €51/48 hours, €62/72 hours for adults; valid through 31 March 2027).
Cream or black-green taxis are metered and reasonably priced. Uber and Bolt operate throughout the city and are often cheaper than taxis. Useful for hills and late nights.
Humberto Delgado Airport is 7km from center. Options: Metro Red Line (single ticket €1.90, about 20 minutes), Aerobus (direct to center; check the operator for the fare), taxi (€15-20, 20-30 minutes), or Uber (€10-15).
Important: Always validate tickets before boarding. Inspectors check frequently with steep fines for invalid tickets.