The cheapest Glasgow to Ulaanbaatar return flight on the radar right now is £728, flying with KLM + MIAT Mongolian Airlines via one or more connections. It covers departures in January 2027, and every dated link below opens that exact GLA–ULN search on Skyscanner. The price we usually record on this route is £799. Across 8 recorded checks it has ranged between £728 and £5,241. Our sampling points to January 2027 as the cheapest month to fly Glasgow to Ulaanbaatar.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from Glasgow? We track 23 other departure cities for Ulaanbaatar, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since Glasgow to Ulaanbaatar is often still worth booking within a day or two of the fare we found.