If you thinking of using Korean Air Skypass miles in the next year, you may want to look at their awards charts. Some of their requirements are going up for tickets issued after March 31, 2014. The one I saw that is of interest to me is that the mileage required to upgrade off-peak from economy to prestige (from North America and Oceania) will go from 75,000 to 100,000. Some aren't going up. It looks like it will still take 85,000 to get an off-peak economy award ticket and 125,000 peak.