Airline industry roundup: 1) Industry watchers see the recent fare hike fired off by Southwest Airlines (LUV +0.8%) sticking with other carriers soon to follow. The higher fares could hit an environment where capacity is already trimmed and oil prices are off highs. 2) Delta Air Lines (DAL -1%) has its own little gig going with a refinery now spitting out jet fuel - an event that has analysts sharpening pencils. Which carrier will follow? 3) US Airways (LCC +1%) still quietly looks for a way to make a merger with American Airlines (AAMRQ.PK) fly before the firm exits bankruptcy so management can get their hands on what would be a powerhouse combined airline.