United Airlines was bullish on Wednesday about a "strong finish" to the year as the carrier saw demand begin to rise earlier in the month amid decreased uncertainty.  The Chicago-based airline said in its second-quarter earnings report that demand posted a "sequential 6-point" acceleration beginning in early July, with business demand notching a "double-digit acceleration" compared to the second quarter. That uptick, United said, came from "less geopolitical and macroeconomic uncertainty."  "Importantly, Un ...