The cheapest Lisbon to Singapore return flight on the radar right now is €550, flying with Finnair via one or more connections. It covers departures in November 2026, and every dated link below opens that exact LIS–SIN search on Skyscanner. That is roughly 20% below the €688 this route usually costs. Across 77 recorded checks it has ranged between €525 and €1,532. Our sampling points to November 2026 as the cheapest month to fly Lisbon to Singapore.
Every fare here is re-confirmed against Skyscanner automatically, and each one is stamped with the moment it was last checked, so you can see how fresh it is instead of taking it on trust. Not flying from Lisbon? We track 61 other departure cities for Singapore, listed at the foot of this page.
Fares move quickly. If this Lisbon to Singapore price has gone by the time you search, shift the dates a day or two either side, because the same route is often still cheap just next door.