The cheapest way to the airport. Nothing listed is quicker.
Metro, red line
Vermelha · Metropolitano de LisboaPickup, hours & luggage
Boards at. Saldanha station, on the red line platforms
Tap a contactless bank card: EUR 1.92, valid across the network — the cheapest option if you arrive with nothing. A navegante occasional card (EUR 0.50) plus a single ticket (EUR 1.90) costs EUR 2.40 instead. Zapping is cheapest per journey at EUR 1.72, but needs the card and a EUR 3 minimum top-up.
Luggage. No stated limit. Note that Carris caps luggage on city buses at 55x40x20 cm; the metro does not.
Hours. The same hours as the rest of the network, every day including weekends and holidays: about every 6 to 10 minutes through the day, widening near opening and closing.