Free hotel during transfer
Korean Air offers free accommodation during long-haul connections. This includes accommodation in a four-star or five-star hotel with breakfast and a transfer to and from the airport. The condition is that you fly only with this airline for your entire journey (i.e. until your final destination). For Economy Class passengers, accommodation is provided in one direction only on a return ticket, while Business and First class passengers can be accommodated in both directions. In addition, you must use the first available connecting flight of that airline and the transfer time must be a minimum of 12 hours.
If you purchase ticket directly with the carrier, use the email mohnesorg@koreanair.com to book your hotel room.

Korean Air