The cheapest flight to Amsterdam you can get by boooking 58 days before departure.
The most popular airlines on the route Lisbon - Amsterdam: TAP Air Portugal (TP), Lufthansa (LH), KLM (KL).
The cheapest flights you can book on the route Portela (LIS) - Schiphol (AMS).
Direct flights last about 2h 55min.
Direct flights available 7 days a week.
Direct flights: TAP Air Portugal (TP), Iberia (IB), Vueling (VY).