The cheapest Frankfurt to Ulaanbaatar return flight on the radar right now is €647, flying with MIAT Mongolian Airlines non-stop. It covers departures in November 2026, and every dated link below opens that exact FRA–ULN search on Skyscanner. Across 19 recorded checks it has ranged between €604 and €928. Our sampling points to November 2026 as the cheapest month to fly Frankfurt to Ulaanbaatar.
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 Frankfurt? We track 49 other departure cities for Ulaanbaatar, listed at the foot of this page.
Fares move quickly. If this Frankfurt to Ulaanbaatar 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.