The cheapest Glasgow to Seoul return flight on the radar right now is £721, flying with British Airways + Air India via one or more connections. It covers departures in May 2027, and every dated link below opens that exact GLA–ICN search on Skyscanner. The price we usually record on this route is £589. Across 43 recorded checks it has ranged between £484 and £732. Our sampling points to May 2027 as the cheapest month to fly Glasgow to Seoul.
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 62 other departure cities for Seoul, 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 Seoul is often still worth booking within a day or two of the fare we found.