The cheapest Bucharest to Chiang Mai return flight on the radar right now is €557, flying with Air China via one or more connections. It covers departures in November 2026, and every dated link below opens that exact OTP–CNX search on Skyscanner. At 34% under the €838 we normally record here, it is one of the strongest OTP–CNX fares in our index. Across 79 recorded checks it has ranged between €381 and €910. Our sampling points to November 2026 as the cheapest month to fly Bucharest to Chiang Mai.
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 45 other departure cities for Chiang Mai, listed at the foot of this page.
Fares move quickly. If this Bucharest to Chiang Mai 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.