I'm not surprised that they are starting once a day, but that can be self-defeating. It looks like the QKB-DEN is aimed at the late bank of flights from DEN, which can be problematic for eastbound flights (not everyone wants to get home from vacation at midnight). I could see a morning QKB-DEN being added as the first expansion. Given traffic on I-70 on Friday and Sunday afternoons, it will be interesting to see if they have issues with this in the first couple weeks. The demand will likely take a nosedive starting in mid-April due to mud season.