In general, when looking for the cheapest flight to Busan, try to choose a flight departing in February for the best deal.
Most flyers found that booking flight tickets 53 days in advance of their planned departure date is, on average, the best time to get cheap flights to Busan.
In general, booking your departure to Busan for a Monday represents the best deal on airfare. Try to avoid a Saturday departure to stay away from the highest prices.
Typically, cheap prices to Busan are most often found for midday flights. Cheap prices are less likely for evening flights.