South Korea’s full-service carrier Korean Air Lines Co. will revise its mileage redemption program for reward flights and upgrades based on distance instead of region from April. Some customers may be unhappy with the new system as they have to redeem more miles than before for long-haul services.
The airline had pushed back the introduction of the new program by two years in 2021 as travel demand vanished after the Covid outbreak in 2020 prompted governments to…