The cheapest Madrid to Hong Kong return flight on the radar right now is €586, flying with KLM + Air France via one or more connections. It covers departures in October 2026, and every dated link below opens that exact MAD–HKG search on Skyscanner. The price we usually record on this route is €602. Across 74 recorded checks it has ranged between €522 and €4,320. Our sampling points to October 2026 as the cheapest month to fly Madrid to Hong Kong.
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 Madrid? We track 62 other departure cities for Hong Kong, listed at the foot of this page.
Fares move quickly. If this Madrid to Hong Kong 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.