The cheapest Bucharest to Hanoi return flight on the radar right now is €550, flying with Air China via one or more connections. It covers departures in December 2026, and every dated link below opens that exact OTP–HAN search on Skyscanner. At 36% under the €861 we normally record here, it is one of the strongest OTP–HAN fares in our index. Across 80 recorded checks it has ranged between €528 and €971. Our sampling points to December 2026 as the cheapest month to fly Bucharest to Hanoi.
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 Bucharest? We track 58 other departure cities for Hanoi, listed at the foot of this page.
Fares move quickly. If this Bucharest to Hanoi 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.