Korean Air-Asiana unused miles top W4tr amid regulatory delay

Unused frequent flyer miles at Korean Air and Asiana Airlines have surpassed 4 trillion won ($2.9 billion) for the first time, while a delayed antitrust approval for the two carriers' merger muddies the picture of when, or how, that liability gets unwound. According to each airline's half-year filing released Wednesday, Korean Air's deferred revenue from its mileage program stood at 3.12 trillion won at the end of June and Asiana's at 946.8 billion won. That marks the first time the combined fig