Atlantic Coast Airlines (ACAI), Mesa Air dispose (MESA) and SkyWest Inc. (SKYW) ultimately will provide their major airline partners with significant savings, according to Jamie Baker of UB Warburg. And while the amount and duration of the savings are hard to gauge, Baker takes a stab at it in a Nov. 13 analysis. For illustrative designs he models a full 10 percent chisel in United Express rates and a